Free Tool
Maritime Unit Converter
Convert between the units maritime work actually uses — distances, speeds, weights, volumes and container capacity.
Exact unit definitions — 1 nautical mile = 1.852 km exactly; 1 cable = 0.1 nautical mile; 1 fathom = 6 ft = 1.8288 m; 1 knot = 1 nm/h; 1 bar = 100 kPa; 1 psi = 6.894757293168 kPa; 1 kgf/cm² = 98.0665 kPa; 1 long ton = 1.0160469088 tonnes; 1 FEU = 2 TEU. No rounded approximations.
How it works
Exact definitions, not approximations.
Defined conversions
Every factor uses the formal unit definition — 1 nautical mile equals 1.852 km exactly, 1 knot is one nautical mile per hour, 1 long ton is 1.0160469 metric tonnes.
Maritime-focused units
Cables, knots, long and short tons, oil barrels, and container capacity in TEU and FEU — the units that show up in real shipping documents.
Runs entirely in your browser
Conversions are computed locally — nothing you type leaves your device. Useful on shore and at sea alike.
Get in touch
Tools like this, built into the workflow.
Voyage Intel Pro carries maritime utilities inside the voyage environment — offline-first, where ships work.