Maritime & Metocean Calculators
Metocean and nautical calculators for Australian maritime operations. Calculate wave energy, tide offsets, vessel fuel consumption, and coastal hydrodynamics.
Explore Maritime Calculators(14)
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.