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The complete boat maintenance management platform. Track tasks, collaborate with your crew, and keep your vessel in top condition.

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5% of our revenue goes to carbon removal via Stripe Climate.

    Free Sailing Tools

    Maritime calculators, charts, and reference tools for sailors - all free, no signup required.

    Free to use
    No signup required
    Instant results

    Unit Converter

    Nautical and metric conversions

    Wind Converter

    Wind speed and Beaufort scale

    Phonetic Alphabet

    NATO alphabet and text converter

    OpenSeaMap

    Interactive nautical charts

    Weather Charts

    European weather and wind maps

    Sail Trim

    Sailing optimization guide

    Mayday Emergency

    Distress call generator

    Navigation Calculator

    Course conversion, leeway, and current triangle

    Discover More Sailing Tools

    Register for ClearShip to manage boat maintenance, tasks, checklists, inventory, and collaborate with your crew - plus access all sailing tools.

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