Calculator Tools Directory
Over 193 free working calculators covering Home Loans, Income Tax, Conversions, Math, Physics, Engineering, Health, Aviation, Maritime and Finance — calibrated for Australia 2026.
All calculators
Mortgage Calculator
Borrowing power, repayments and refinance — modelled on current Australian lender criteria.
Tax Calculator
PAYG, sole trader and capital gains — updated for the current Australian tax year.
Stamp Duty Calculator
State-by-state transfer duty for all 8 Australian states — FHB concessions, FHOG & conveyancing. Updated 2026.
Business Costs & BAS
Quarterly P&L, GST/BAS, PAYG instalments and super guarantee — aligned to ATO 2025/2026.
Standard Calculator
A fast, safe arithmetic calculator for everyday math — built with a secure expression parser, no eval().
Percentage Calculator
Find X% of Y, what % X is of Y, or % change — instant live results for GST, discounts and salaries.
E6B Flight Computer
Interactive digital E6B — fuel burn, ground speed, wind correction angle, density altitude.
E6B Whizz Wheel
Analogue E6B flight computer — turn the circular slide rule and work the wind side, with a full how-to guide.
Density Altitude Calculator
Pressure and density altitude from elevation, QNH and OAT — °C/°F and ft/m support.
Pressure Altitude & ISA Calculator
Calculate Pressure Altitude (PA), ISA Standard Temp (15°C baseline, -2°C/1000ft), and ISA Deviation from QNH.
PNR & ETP Calculator
Point of No Return (PNR) and Equi-Time Point (ETP / Critical Point) for flight navigation and fuel reserve planning.
Glide Slope & Descent Calculator
Calculate 3° ILS glide slope descent rate (FPM), 3:1 Top of Descent (TOD) distance, and headwind ground speed penalty.
Flight Time, Fuel & CASA Reserves Calculator
Calculate trip fuel, contingency fuel, variable & fixed CASA 30/45-min legal reserves, and total fuel on board.
Runway Crosswind & Headwind Calculator
Compute precise crosswind, headwind, and tailwind runway components using trigonometric angular vectors.
Wind Correction Angle & Heading Calculator
Calculate Wind Correction Angle (WCA), True Heading (TH), and Ground Speed (GS) from wind vector triangles.
True, Calibrated & Equivalent Airspeed Calculator
Convert Indicated Airspeed (IAS) to Calibrated (CAS), Equivalent (EAS), and True Airspeed (TAS) with Mach number.
Aircraft Weight & Balance Envelope Calculator
Calculate total takeoff weight, total moments, and Center of Gravity (CG) location within forward/aft limits.
Holding Pattern Entry Calculator
Determine standard & non-standard holding pattern entry sectors: Direct, Parallel, or Teardrop (Offset) entries.
Compound Interest
Visualize wealth growth over time with monthly contributions, compounding frequency, and interactive chart.
Car Fuel Calculator
Exact fuel cost for your trip — Australian petrol prices, L/100km efficiency, passengers and CO₂.
Moon Phase & Solunar Fishing
Exact moon phase, illumination %, solunar fish feeding score, spring/neap tides, and lunar vs solar calendar.
Islamic Hijri Date & Birthday Converter
Convert Gregorian dates to Islamic (Hijri) lunar dates. Find your Muslim birthday, Arabic script, and lunar age.
Date Calculator & Day Counter
Calculate exact days between dates, working business days, weeks, and hours. Add or subtract calendar duration.
Exact Age Calculator
Find your exact chronological age in years, months, days, hours, and minutes with next birthday countdown.
Fraction Calculator
Solve fraction math problems with step-by-step reduction, mixed numbers, and decimal conversion.
Exponent & Power Calculator
Compute xⁿ powers, square roots, cube roots, natural log (ln), and log10 instantly.
GCD & LCM Calculator
Compute GCD (HCF) and LCM using Euclid's algorithm.
Ratio & Proportion Calculator
Calculate ratios, scale dimensions, recipes, and simplify proportion equations.
Quadratic Formula Calculator
Solve quadratic polynomial roots, discriminant Δ, and parabola vertex coordinates.
Pythagorean Theorem Calculator
Solve a² + b² = c² right triangle geometry, perimeter, and area.
Circle & Geometry Calculator
Calculate circle area (πr²), perimeter (2πr), and 3D sphere volume.
Statistics & Mean / Median / Mode
Enter numbers separated by commas to get average, median, range, variance, and standard deviation.
2x2 Matrix Calculator
Compute 2x2 linear algebra matrix determinants, trace, and inverse matrix.
BIMDAS / BODMAS / PEMDAS Order of Operations Calculator
Solve complex math equations with step-by-step order of operations breakdown. Compares BIMDAS (Australia), BODMAS (UK/India), and PEMDAS (USA).
Vedic Mental Math & Chisanbop Finger Abacus Calculator
Master rapid Indian Vedic math mental shortcuts, Ekadhikena Purvena squaring, Nikhilam base multiplication, and Korean/Indian Chisanbop finger abacus arithmetic.
Length & Distance Converter
Precision metric and imperial distance unit converter.
Weight & Mass Converter
Convert weight between metric kg/g and imperial lbs/oz/stone.
Temperature Converter
Instant temperature unit conversion for °C, °F, and K.
Volume & Liquid Converter
Convert liquid volume units: L, mL, m³, cups, tsp, tbsp, fl oz, gallons.
Area Converter
Convert land area and room dimensions: m², sq ft, acres, hectares, km².
Speed Converter
Convert velocity units for driving, aviation, and physics.
Pressure Converter
Convert atmospheric, hydraulic, and weather pressure units.
Energy & Work Converter
Convert work, heat, food energy, and electricity consumption units.
Fuel & Liquid Weight Calculator
Instant conversion between Litres, US Gallons, Imperial Gallons, Kilograms, and Pounds based on standard fluid density.
Simple Interest Calculator
Compute simple interest I = P × r × t for loans, bonds, and deposits.
ROI & Investment Return Calculator
Evaluate investment profitability, net profit, and compound annual growth rate.
Savings Goal & Runway Calculator
Calculate how long it takes to save for a home deposit, emergency fund, or vehicle.
Inflation & Purchasing Power Calculator
Model the impact of CPI inflation on purchasing power over 1 to 30 years.
Asset Depreciation Calculator
Compute annual tax depreciation schedule for business equipment, vehicles, and assets.
Net Worth Calculator
Track real estate, superannuation, cash, investments against mortgage, car loans, and debts.
Break-Even Point Calculator
Compute unit break-even point, contribution margin, and target revenue for businesses.
Present / Future Value (PV/FV) Calculator
Discount future cash flows to present value or compound present capital to future value.
Currency Converter & Bank FX Fee Comparison
Convert global currencies (AUD, USD, EUR, GBP, NZD, JPY, CAD, SGD, CNY, INR, AED, SAR) and see how much banks charge in hidden markup fees.
Precious Metals, Gold, Silver & Platinum Bullion Calculator
Determine intrinsic value for Gold (24k, 22k, 18k, 14k, 9k), Silver (999 Fine, 925 Sterling), and Platinum bullion and jewelry.
10-Year Government Bond Yield & Commercial Lease Calculator
Price Australian Commonwealth & US Treasury government bonds, understand yield inverse price mechanics, and project 10-year commercial lease escalation schedules.
Crude Oil, Gas Refinery Crack Spread & BRICS Gold Reserve Calculator
Analyze global oil & gas economics, compute 3:2:1 refinery crack spreads (Crude to Petrol/Diesel), and value central bank bullion reserves in USD and AUD.
Borrowing Power Calculator
Assess how much an Australian bank will lend you for a home loan based on 2026 criteria.
Extra Mortgage Repayments Calculator
Calculate how extra repayments shorten your 30-year home loan and save tens of thousands in interest.
LMI (Lenders Mortgage Insurance) Estimator
Estimate Lenders Mortgage Insurance premiums for 5%, 10%, or 15% home loan deposits.
Mortgage Refinance Savings Calculator
Determine if switching home loan lenders saves money after discharge and application fees.
Rent vs Buy Home Calculator
Compare long-term wealth accumulation of home ownership vs renting.
Rental Yield & Investment Property Calculator
Evaluate investment property returns, gross rental yield, and cash flow after expenses.
GST / VAT Calculator
Calculate Australian 10% Goods and Services Tax (GST) for BAS invoices.
Capital Gains Tax (CGT) Calculator
Compute capital gains tax after cost base deductions and 50% CGT discount.
HECS / HELP Debt Repayment Calculator
Determine ATO compulsory HECS-HELP repayment rate based on income tiers.
Paycheck & Salary Take-Home Pay Calculator
Calculate net take-home salary based on Australian Stage 3 tax rates and Medicare levy.
Profit Margin & Markup Calculator
Compute margin vs markup from cost price and selling price.
Velocity, Distance & Time Calculator
Solve linear kinematics equations in m/s, km/h, and mph.
Acceleration & Newton’s Second Law
Solve Newton's second law of motion F = ma for mass, force, and acceleration.
Kinetic & Potential Energy Calculator
Compute mechanical energy, kinetic energy, and potential energy in Joules.
Ohm's Law & Electrical Power Calculator
Solve electrical circuits for Volts, Amperes, Ohms, and Watts.
Projectile Motion Calculator
Compute parabolic trajectory, range, max height, and time of flight for projectiles.
Density, Mass & Volume Calculator
Compute mass, volume, and volumetric density.
Bank Angle, G-Force & Stall Speed Calculator
Compute aerodynamic load factor Gs, accelerated stall speed increase, and turn radius for coordinated turns.
High Altitude Hypoxia & TUC Calculator
Determine Time of Useful Consciousness (TUC) window, ambient barometric pressure, and aviation oxygen regulations by altitude.
Bernoulli's Principle & Aerodynamic Lift Calculator
Compute aerodynamic lift, dynamic pressure in Pascals, and mass supported by an airfoil using Bernoulli's equation.
Speed of Sound & Mach Number Calculator
Determine the local speed of sound in air as a function of temperature and convert true airspeed to Mach numbers.
Speed of Light & Time Dilation Calculator
Compute Einstein's special relativity time dilation and Lorentz factor for spacecraft traveling near the speed of light (c).
Electromagnetic Waves & Frequency Calculator
Analyze the electromagnetic wave spectrum: Radio, Microwaves, Infrared, Visible Light, Ultraviolet, X-Rays, and Gamma Rays.
Earth Coordinates, Equator vs Pole & Solstice Calculator
Determine geographic meridian distances, Equator vs Pole comparisons, and summer/winter solar noon angles by latitude.
2D Vector Velocity & Kinematics Calculator
Resolve 2D motion vectors into horizontal (X) and vertical (Y) components using trigonometric vector kinematics.
Space Travel Time & Planetary Distance Calculator
Compute interplanetary and interstellar voyage durations, Astronomical Units (AU), and speed of light communication delay.
Atmosphere Layers & Ionosphere Temperature Profile Calculator
Analyze atmospheric temperature gradients, ozone heating, and HF radio wave reflection in the D, E, and F ionosphere layers.
Buoyancy & Archimedes' Fluid Displacement Calculator
Compute Archimedes' upward buoyant force in Newtons and kg, determine if an object floats or sinks, and calculate displaced volume.
Magnetic Variation, Compass Deviation & TVMDC Calculator
Compute navigation headings using the TVMDC cadence card (True, Variation, Magnetic, Deviation, Compass) and assess geomagnetic storms.
Concrete Volume & Bag Calculator
Estimate concrete volume for house slabs, footings, steps, and posts.
Electrical Voltage Drop & Wire Gauge
Compute voltage drop for single-phase 240V and 12V DC cables.
Hydraulic Cylinder Force & Pressure
Compute hydraulic cylinder extension force, retraction force, and piston area.
Resistor Color Code Calculator
Determine resistance value in Ohms and tolerance from color codes.
Thermal Expansion Calculator
Compute thermal growth and contraction of steel, aluminum, and copper.
Gear Ratio & RPM Calculator
Compute speed reduction and mechanical advantage for gear systems.
Topographic Map Scale Calculator
Calculate real-world ground distances from topographic maps using standard scales (1:25,000, 1:50,000, 1:100,000).
Contour Slope & Gradient Calculator
Determine terrain steepness, gradient percentage, and slope angle from topographic map contour intervals and horizontal distance.
Structural Arch, Rib & Bridge Load Calculator
Analyze structural arch bridge mechanics, compute abutment thrust (H = wL²/8h), and determine compressive loads across structural ribs.
Percentage Change Calculator
Compute percentage change, growth rate, and price variations.
Percentage Difference Calculator
Compute relative percentage difference compared against average value.
Discount & Sale Price Calculator
Compute sale discount percentage savings on retail items.
Tip & Bill Split Calculator
Split restaurant bills and total tip among guests instantly.
Fraction to Percentage Converter
Convert any fraction into percentage and decimal value.
BMI (Body Mass Index) Calculator
Calculate your Body Mass Index (BMI) using WHO standard metric or imperial formulas.
BMR (Basal Metabolic Rate) Calculator
Estimate your Basal Metabolic Rate (BMR) calories burned per day at rest.
TDEE (Total Daily Energy Expenditure) Calculator
Calculate your Total Daily Energy Expenditure (TDEE) based on activity multipliers.
Macronutrient Ratio Calculator
Distribute daily target calories into optimal grams of protein, carbs, and fats.
Calorie Burn & Exercise Calculator
Calculate calories burned during workouts based on MET intensity and body mass.
Target Heart Rate Zone Calculator
Determine your maximum heart rate and target training zones for optimal fitness.
Body Fat Percentage Calculator
Calculate body fat % using circumference measurements of waist, neck, and hips.
Daily Water Intake Calculator
Determine recommended fluid intake in liters and glasses per day.
EV Charging Cost & Time Calculator
Estimate electricity cost and charging time to charge EV battery from state of charge.
EV Battery Driving Range Estimator
Calculate expected EV driving range in km and miles from battery state of charge.
Vehicle Towing & Payload Capacity Calculator
Determine legal towing limits, combined vehicle mass (GCM), and remaining payload capacity.
Tire Size Circumference & Diameter Converter
Calculate tire physical dimensions from metric tire codes (e.g. 225/45R17).
Turbo & Supercharger Boost Compression Calculator
Compute dynamic forced induction compression ratio, manifold pressure in PSI and bar, and recommended fuel octane rating.
Jet Engine Thrust & Compression Ratio Calculator
Compute turbojet and turbofan net thrust, exhaust delta velocity, and propulsive efficiency from airflow mass.
Truck Diesel Fuel & AdBlue Long-Haul Calculator
Estimate long-haul interstate truck fuel burn (L/100km), AdBlue DEF usage, cost per kilometer, and heavy vehicle ATO fuel rebates.
Aircraft Takeoff Distance & Obstacle Clearance Calculator
Compute takeoff roll based on aircraft gross weight, pressure altitude, OAT temperature, headwind/tailwind vector, runway slope, and grass surface factor.
Aircraft Landing Distance & Runway Required Calculator
Calculate aircraft landing distance based on landing weight, elevation, temperature, wind, and runway surface conditions (dry paved, wet paved, dry grass, wet grass).
Aircraft Climb Performance & Rate of Climb (ROC) Calculator
Compute Rate of Climb (FPM), best rate (Vy) and best angle (Vx) climb gradients in ft/NM and %, time and fuel required to climb from departure to target cruise altitude.
Airspeed Calibration & Error Solver (IAS, CAS, EAS, TAS & Mach)
Detailed airspeed triangle solver accounting for pitot-static position error, air density ratio (sigma), standard atmosphere temperature, and compressibility.
ISO 2533 / ICAO Standard Atmosphere (ISA) Calculator & Table
Standard atmosphere converter from sea level to 65,000 ft based on ISO 2533 and ICAO Doc 7488 formulas. Computes standard temperature, pressure in hPa/inHg/psi, air density in kg/m³, and acoustic speed.
Diesel vs Petrol Car & Ute Breakeven Payback Calculator
Calculate whether buying a diesel engine vehicle saves money over petrol. Accounts for annual mileage, fuel consumption differences, pump price differentials, and vehicle purchase surcharges.
East-West Transcontinental Freight & Road Train Fuel Calculator
Model heavy freight haulage across Australia's transcontinental corridors (Nullarbor, Stuart Hwy, Hume Hwy) for Semis, B-Doubles, and Road Trains.
Loan Payoff, Extra Repayment & Amortization Schedule Calculator
Complete loan payoff and accelerated amortization schedule calculator. See exact debt-free date, interest saved, and month-by-month loan balance reduction curves.
ISO Metric & Whitworth Thread & Caliper Measurement Calculator
Precision engineering thread solver for ISO Metric 60° (ISO 261/965) and British Standard Whitworth 55° (BSW/BSF) threads. Computes major/minor/pitch diameters, tapping drill bit sizes, and vernier caliper / micrometer wire values.
Appliance Energy Usage & Electricity Bill Calculator
Accurate power cost calculator for home appliances, heaters, air conditioners, EV chargers, and workshop tools. Enter appliance wattage and running hours to get quarterly bills and annual carbon emissions.
Solar Panel System Output & Battery ROI Calculator
Comprehensive Australian solar return on investment calculator. Models daily/annual solar PV generation (kWh), grid avoided costs, feed-in tariff credits (FiT), and capital payback period.
Electric & Combustion Motor Torque, Power (kW/HP) & RPM Calculator
Engineering power and torque calculator for electric motors, gearboxes, and internal combustion engines. Converts between kilowatts (kW), horsepower (HP), rotational speed (RPM), and torque (N·m and lb-ft).
Electric Motor Full Load Amps (FLA) & Running Cost Calculator
Electrical motor sizing calculator for single-phase (240V) and 3-phase (415V) AC induction motors. Computes full-load operating current (Amperes), power factor, apparent power (kVA), circuit breaker protection, and electricity costs.
Structural Beam Deflection & Bending Stress Calculator
Structural engineering beam solver for simply supported and cantilever beams. Calculates maximum elastic deflection, peak bending moment, and extreme fiber flexural stress against AS 4100 / AS 1170.0 deflection limits (L/250 and L/360).
Fuel Cost per Kilometer & Commute Expense Calculator
Accurate road travel fuel cost calculator. Computes exact fuel cost per kilometer (¢/km and $/km), trip fuel expenses, weekly work commute budgets, and annual driving costs based on vehicle L/100km consumption and Australian fuel prices.
Energy Cost per Hour & Machinery Duty Cycle Calculator
Industrial and commercial power cost calculator. Computes hourly energy costs, duty cycle adjusted electricity consumption, shift costs, and monthly expenses for workshop machinery, server racks, electric motors, and HVAC systems.
Battery Runtime & Life Cycle Calculator (LiFePO4, AGM, UPS)
Deep-cycle battery runtime solver for solar power systems, 4WD camping setups, caravans, off-grid cabins, and uninterruptible power supplies (UPS). Models Lithium Iron Phosphate (LiFePO4), AGM Lead-Acid, and Li-ion battery chemistries with inverter efficiency derating.
Stress, Strain & Young's Modulus Calculator (Hooke's Law)
Materials science and mechanical engineering calculator. Computes tensile/compressive normal stress ($\sigma = F/A$), axial deformation strain ($\varepsilon = \Delta L / L_0$), Young's modulus of elasticity ($E$), and factor of safety against material yielding.
Pipe Flow Rate, Velocity & Reynolds Number Calculator
Fluid mechanics and piping hydraulics calculator. Calculates fluid flow velocity from pipe internal diameter and volumetric flow rate, evaluating flow regime (Laminar vs. Turbulent) via Reynolds Number ($Re = \frac{\rho v D}{\mu}$) and piping velocity guidelines.
ISO Camera Exposure, Shutter Speed, Aperture & EV Calculator
Photographic engineering and optical exposure solver. Calculates standard Exposure Value ($\text{EV}_{100}$), scene brightness in Lux and Foot-Candles, and equivalent shutter speed / aperture settings based on ISO sensitivity (100 to 12800).
Electric Motor Efficiency, Loss Segregation & Energy Waste Calculator
Industrial electrical motor efficiency calculator conforming to IEC 60034-2-1 and IEC 60034-30-1 standards. Breaks down motor thermal dissipation into stator/rotor copper $I^2R$, magnetic core iron, and friction/windage losses, estimating annual power bills and upgrading ROI.
Aircraft Stall Speed in Banked Turns & Flap Configurations
Aerodynamic flight theory stall calculator. Computes accelerated stall speed in level banked turns ($V_S' = V_S \sqrt{n} = V_S \sqrt{1/\cos\theta}$), load factor (G-force), flap deployment effects, and aircraft weight scaling for CASA and FAA pilot exams.
Aircraft Glide Ratio, Glide Range & Emergency Descent Calculator
Emergency flight planning glide calculator. Calculates maximum engine-out still-air gliding range, headwind/tailwind distance adjustments, steady rate of descent (ROD in FPM), and total glide duration from release altitude AGL.
Helicopter IGE & OGE Hover Ceiling Performance Calculator
Helicopter flight performance solver for Robinson R44/R66, Bell 206/407, Airbus H125 (AS350), and Sikorsky S-76. Computes maximum IGE and OGE hover ceilings based on gross weight, pressure altitude, ambient temperature, and density altitude.
Helicopter Aerodynamic Power Required & Fuel Burn Calculator
Rotary-wing aerodynamics and fuel consumption calculator. Decomposes total shaft horsepower into Induced Power, Profile Drag Power, and Parasite Drag Power, identifying the bucket minimum-power airspeed ($V_{mp}$), best range speed ($V_{br}$), and fuel endurance on usable tanks.
Universal Holiday & Travel Destination Budget Calculator
Comprehensive travel budgeting calculator for international holidays. Select from major world destinations or custom settings to calculate daily and total trip expenses across Budget/Backpacker, Mid-Range, and Luxury tiers with currency conversion to AUD and USD.
Osaka Trip Cost & Travel Budget Calculator
Detailed travel budget calculator for Osaka, Japan. Computes daily and total costs in Japanese Yen (¥ JPY) and Australian Dollars (A$ AUD) for accommodation, street food (kushikatsu, takoyaki), Universal Studios Japan, and Osaka Amazing transit passes.
Kyoto Trip Cost & Travel Budget Calculator
Travel budget estimator for Kyoto, Japan. Calculates costs for temple entries (Kinkaku-ji, Fushimi Inari), ryokan stays with kaiseki dinners, subway/bus day passes, and travel to Nara in Japanese Yen and AUD.
Hong Kong Trip Cost & Vacation Budget Calculator
Vacation cost estimator for Hong Kong. Computes daily expenses in Hong Kong Dollars (HK$) and Australian Dollars (A$) across hotels, dim sum, Victoria Peak Tram, Star Ferry, and tourist Octopus card transit.
Phuket Holiday Cost & Beach Vacation Budget Calculator
Travel budget calculator for Phuket, Thailand. Calculates trip expenses in Thai Baht (฿ THB) and AUD for Patong/Kata hotels, island tours (Phi Phi, James Bond Island), beachside dining, and Grab/Songthaew transit.
Pattaya Trip Cost & Vacation Budget Calculator
Budget calculator for Pattaya, Thailand. Computes expenses in Thai Baht (฿ THB) and AUD for accommodation, Sanctuary of Truth, Koh Larn ferries, street food, and 10-Baht Songthaew loop buses.
Kuala Lumpur Trip Cost & Malaysia Travel Budget Calculator
Vacation budget planner for Kuala Lumpur, Malaysia. Calculates daily and total costs in Malaysian Ringgit (RM MYR) and AUD for 4-star infinity pool hotels, street food in Bukit Bintang, Batu Caves, and Grab rides.
Fukuoka Trip Cost & Kyushu Travel Budget Calculator
Travel budget calculator for Fukuoka, Japan. Computes expenses in Japanese Yen (¥ JPY) and AUD for Hakata ramen, Nakasu open-air yatai food stalls, Dazaifu Tenmangu shrine, and Fukuoka subway day passes.
Florence Trip Cost & Tuscany Holiday Budget Calculator
Travel budget planner for Florence (Firenze), Italy. Computes expenses in Euros (€ EUR) and AUD for historic center hotels, Uffizi & Accademia museum entries, Tuscan trattorias, and day trips to Chianti and Pisa.
Dublin Trip Cost & Ireland Vacation Budget Calculator
Travel cost calculator for Dublin, Ireland. Calculates expenses in Euros (€ EUR) and AUD for city center accommodation, Guinness Storehouse tours, Book of Kells, pub meals, and Leap card transport.
Porto Trip Cost & Portugal Holiday Budget Calculator
Budget calculator for Porto, Portugal. Computes vacation costs in Euros (€ EUR) and AUD for riverside hotels, wine tasting in Vila Nova de Gaia, Francesinha dinners, and Andante metro transport.
Berlin Trip Cost & Germany Travel Budget Calculator
Travel budget calculator for Berlin, Germany. Calculates daily expenses in Euros (€ EUR) and AUD for Mitte/Kreuzberg hotels, Museum Island passes, currywurst & döner street food, and BVG 24-hour transit tickets.
Munich Trip Cost & Bavaria Travel Budget Calculator
Vacation cost estimator for Munich (München), Germany. Calculates daily expenses in Euros (€ EUR) and AUD for Bavarian hotels, traditional beer gardens, Neuschwanstein day trips, and MVV transit passes.
Venice Trip Cost & Italian Holiday Budget Calculator
Travel budget planner for Venice (Venezia), Italy. Computes vacation expenses in Euros (€ EUR) and AUD for island hotels, gondola rides, ACTV Vaporetto waterbus passes, cicchetti wine bars, and Doge's Palace.
Car Loan Repayment & Balloon Payment Calculator
Australian car and vehicle finance calculator. Computes monthly repayments, total interest, establishment fees, and the balloon residual payable at the end of the loan term.
Emergency Fund & Savings Buffer Calculator
Emergency fund calculator that measures your current runway in months, the shortfall to your target buffer, and how long it takes to close the gap at your current savings rate.
FIRE Calculator — Financial Independence & Early Retirement
Financial Independence Retire Early (FIRE) calculator. Works out your target portfolio from the 4% rule, the years remaining at your current savings rate, and your projected retirement income.
Credit Card Payoff & Minimum Payment Trap Calculator
Credit card payoff calculator showing months to clear your balance, total interest paid, and the difference between a fixed repayment and the minimum payment trap.
Offset Account Savings Calculator
Australian 100% offset account calculator. Computes interest saved, the reduced loan term, and the effective after-tax return your offset balance earns against your mortgage rate.
Interest-Only Loan Reversion & Repayment Shock Calculator
Interest-only reversion calculator for Australian home loans. Shows the interest-only repayment, the higher P&I repayment after reversion, the payment shock, and extra interest paid.
First Home Guarantee (FHBG) Eligibility & Deposit Calculator
Australian First Home Guarantee calculator. Checks the state property price cap, the 5% deposit required, LMI saved through the government guarantee, and your resulting loan amount.
Home Equity Release & Usable Equity Calculator
Australian home equity calculator. Works out total and usable equity at 80% LVR, the amount available to release for a deposit or renovation, and the repayments on the increased loan.
Sole Trader Tax & ABN Income Calculator
Australian sole trader tax calculator. Computes taxable profit after business deductions, income tax, Medicare levy, effective tax rate and the amount to set aside for your annual return.
Superannuation Concessional Cap & Salary Sacrifice Calculator
Australian superannuation calculator for the $32,500 concessional cap. Shows employer SG contributions, remaining headroom, tax saved by salary sacrifice, and any excess contributions.
Division 7A Loan & Minimum Repayment Calculator
Division 7A calculator for loans from a private company to a shareholder or associate. Computes the ATO minimum yearly repayment, interest at the benchmark rate, and the deemed dividend risk.
Novated Lease & FBT Calculator (EV Exemption)
Australian novated lease calculator with Fringe Benefits Tax. Computes pre-tax salary packaging savings, FBT payable under the statutory method, and the full FBT exemption for eligible electric vehicles.
Retaining Wall Block, Gravel & Drainage Calculator
Retaining wall materials calculator for segmental block walls. Estimates block quantities, base course, drainage aggregate volume and tonnage, geofabric area and agricultural drain length.
Timber Beam Span & Bearer Sizing Calculator
Timber beam span calculator using Australian F-grade stress ratings. Computes design load, bending moment, section modulus utilisation and mid-span deflection against the L/300 serviceability limit.
Solar DC String Cable Sizing & Voltage Drop Calculator
Solar DC cabling calculator for PV string circuits. Computes voltage drop over the run, the minimum conductor cross-section, and the derated current capacity at rooftop ambient temperature.
Pump Total Dynamic Head & Power Calculator
Pump sizing calculator using the Hazen-Williams equation. Computes friction head loss, total dynamic head, flow velocity, hydraulic power and the shaft power needed at your pump efficiency.
One-Rep Max (1RM) & Training Percentage Calculator
One-rep max calculator using the Epley and Brzycki formulas. Estimates your 1RM for bench, squat, deadlift, overhead press or row, plus a full percentage-based training load table.
FFMI & Lean Body Mass Calculator
Fat-Free Mass Index calculator. Computes FFMI, height-normalised FFMI, lean body mass and fat mass, with categories from below average through to the natural muscular potential threshold.
Pregnancy Due Date & Gestational Age Calculator
Pregnancy due date calculator using Naegele's rule with cycle-length adjustment, or an IVF blastocyst transfer date. Returns your EDD, current gestational age, conception date and milestone dates.
Blood Alcohol Content (BAC) Calculator — Widmark Formula
Blood alcohol content calculator using the Widmark formula. Estimates BAC from Australian standard drinks, body weight, gender and elapsed time, with hours to reach 0.05 and zero.
Centre of Gravity Fuel Burn-Off Calculator
Aircraft weight and balance fuel burn-off calculator. Computes takeoff and zero-fuel centre of gravity, checks both against the forward and aft limits, and tracks CG movement as fuel burns.
Altimeter Temperature Error Correction Calculator
Cold temperature altimeter correction calculator. Computes the height error caused by below-ISA temperatures and the corrected altitude to fly so true terrain clearance is maintained.
Bali Trip Cost & Indonesian Holiday Budget Calculator
Travel budget planner for Bali, Indonesia. Computes vacation expenses in Indonesian Rupiah (Rp IDR) and AUD for villas, warung and restaurant dining, scooter hire, Grab rides and temple entry fees.
Tokyo Trip Cost & Japan Holiday Budget Calculator
Travel budget planner for Tokyo, Japan. Computes vacation expenses in Japanese Yen (¥ JPY) and AUD for hotels, ramen and izakaya dining, Suica metro travel and attractions like teamLab.
London Trip Cost & UK Holiday Budget Calculator
Travel budget planner for London, United Kingdom. Computes vacation expenses in Pounds (£ GBP) and AUD for hotels, pub and restaurant dining, Oyster card travel, West End shows and attractions.
Paris Trip Cost & France Holiday Budget Calculator
Travel budget planner for Paris, France. Computes vacation expenses in Euros (€ EUR) and AUD for hotels, bistro and cafe dining, Metro and RER travel, and entry to the Louvre and Eiffel Tower.
Marine Fuel Consumption, Range & Trip Cost Calculator
Boat fuel calculator for safe passage planning. Computes cruising range, endurance, litres per nautical mile, passage fuel cost, and whether a planned trip fits inside your usable fuel.
Propeller Pitch, Slip & Boat Speed Calculator
Boat propeller calculator. Computes theoretical zero-slip speed, actual propeller slip percentage, and the pitch change needed to correct wide-open-throttle RPM on a planing hull.
Anchor Scope, Chain Length & Swing Circle Calculator
Anchoring calculator for boats. Computes rode length from scope ratio, accounting for depth, bow height and tidal range, plus swing circle radius and suggested anchor and chain sizing.
Hull Speed & Displacement Ratio Calculator
Hull speed calculator for displacement and planing boats. Computes theoretical hull speed from waterline length, speed/length ratio, displacement/length ratio and the operating regime.
Beaufort Wind Scale & Sea State Estimator
Beaufort scale calculator with sea state estimation. Converts wind speed to Beaufort force and sea description, and estimates significant wave height from wind, fetch and duration.
Significant Wave Height (Hs) & Wave Period Statistics Calculator
Significant wave height calculator using Rayleigh statistics. Converts Hs and zero-crossing period into Hrms, Hmean, H1/10, H1/100, spectral moment m0 and the expected maximum wave.
Ocean Wave Power & Energy Flux Calculator
Wave energy calculator for marine renewables. Computes deep-water wave power per metre of crest, mean energy density, group velocity, array output and annual energy yield in MWh.
Wave Base, Shoaling & Depth of Closure Calculator
Coastal engineering calculator for wave base and shoaling. Solves the dispersion relation for local wavelength, computes the shoaling coefficient, orbital motion at the seabed and depth of closure.
Wave Steepness & Breaking Limit Calculator
Wave breaking calculator using the Miche limiting steepness and McCowan depth criterion. Determines whether a wave breaks, the breaking mechanism, and the breaker type from the Iribarren number.
Directional Wave Spectrum & JONSWAP Parameter Calculator
JONSWAP directional wave spectrum calculator. Computes the Phillips constant, peak spectral density, spectral moments, derived periods and the directional spreading width from the cos^2s model.
Wave Run-Up, Setup & Coastal Inundation Calculator
Coastal inundation calculator using Stockdon et al. (2006). Computes wave setup, swash excursion, 2% exceedance run-up, total water level and freeboard against a dune or seawall crest.
Tidal Prism & Spring/Neap Tidal Range Calculator
Tidal prism calculator for estuaries and inlets. Computes spring and neap tidal range, exchanged volume, peak inlet discharge and velocity, and inlet stability against the O'Brien relationship.
Ocean Current Force & Mooring Drag Calculator
Mooring load calculator for current and wind drag. Computes hydrodynamic and aerodynamic drag force, combined environmental load, mooring line tension at lead angle, and required breaking load.
DWR Wave Buoy Data Interpreter (Hs, Hmax, Tz, Tp, Direction)
Directional Waverider data interpreter. Tests recorded Hmax against Rayleigh expectation and the rogue wave threshold, classifies sea character from the Tz/Tp ratio, and derives steepness and celerity.