OceanCalc

Maritime Measurements

Nautical units, conversions, and definitions: nautical miles, knots, fathoms, and more.

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All Maritime Calculators

OceanCalc is a precision-focused maritime calculation platform built for sailors, navigators, and marine professionals. All formulas are derived from established navigation principles including great-circle computation, rhumb line navigation, and classical seamanship mathematics.

Hull SpeedRhumb LineGreat CircleBearing
NavigationDistanceWind & WavesSailing