MetaCAD QNH Converter

Convert pressure, bunker quantities and maritime units offline. Core calculators stay free; Lifetime Pro adds history, favorites and sharing.

Fast offline conversions for bridge, engine-room and cargo work. MetaCAD QNH Converter puts the most useful pressure, marine, fuel and engineering calculations in one focused app.

FREE TOOLS • QNH and pressure: convert hPa, inHg, mbar, kPa, mmHg, psi, bar and atm. • QFE to QNH: estimate sea-level pressure from field pressure, elevation and temperature. • Bunker quantity: convert barrels or other volume units to mass using the density you enter, and convert mass back to volume. • Marine and engineering units: distance, speed, mass, volume, temperature, power, flow and density. • Sea time and ETA: calculate voyage time and estimated arrival from distance, speed and departure time. • Diesel density: estimate density at a different temperature and calculate mass from volume. • Stowage factor: convert m³/t and ft³/long ton, allow for broken stowage, and estimate cargo quantity from usable volume.

BUILT FOR PRACTICAL WORK • Works offline after installation. • Clear input units and calculation results. • Quick access to QNH from the home screen. • No account is required for the free calculators.

LIFETIME PRO — US$4.99 One non-consumable purchase unlocks unlimited calculation history, favorites and result sharing. Every calculator listed above remains free. The App Store shows the final local price before purchase.

IMPORTANT QFE-to-QNH and diesel-density results are estimates based on the values and assumptions shown in the app. They do not replace approved operational tables, instruments, cargo documents or professional procedures. Verify critical calculations against the standards required for your operation.