NautiCalc

Free · No sign-in

Nautical calculators
that get you there.

A focused set of navigation and passage-planning tools — precise, fast, and usable on a phone at the chart table or in the cockpit. No sign-in, no clutter, works offline.

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Calculators

• Distance & bearingGreat-circle and rhumb-line between waypoints
• Speed · Time · DistanceSolve any one from the other two, plus ETA
• Set & driftCurrent triangle and course-to-steer
• Dead reckoningPlot a DR position from course and log
• Tides & clearanceRule of twelfths and clearance under keel
• Fuel & rangeBurn rate, reserve, and endurance
• Anchor scopeRode length for depth, tide, and freeboard
• Distance to horizonSighting range for lights and objects
• Compass conversionTrue, magnetic, and compass with deviation

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