Engineering Calculators
Precision tools for Australian engineers and builders. Calculate concrete volume, structural load capacities, cable sizing, and hydraulic flow.
Explore Engineering Calculators(26)
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.
Vehicle Towing & Payload Capacity Calculator
Determine legal towing limits, combined vehicle mass (GCM), and remaining payload capacity.
Turbo & Supercharger Boost Compression Calculator
Compute dynamic forced induction compression ratio, manifold pressure in PSI and bar, and recommended fuel octane rating.
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.
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).
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.
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.