Calculators for nautical calculations

⚡ Popular Calculators

Port to Port Distance
Easily calculate the distance between two ports on the map.

Sea Distance Calculator
Calculate sea distance based on coordinates or waypoints.

Sea Mile to KM Converter
Convert sea miles to kilometers.

🆕 New Calculators

MPH to Knots Converter
Convert miles per hour to knots.

KMH to Knots Converter
Convert kilometers per hour to knots.

Sea Distance Calculator
Calculate sea distance based on coordinates or waypoints.

📏 All Distance Calculators

Sea Distance Calculator
Calculate sea distance based on coordinates or waypoints.

Port to Port Distance
Easily calculate the distance between two ports on the map.

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    Create your own Nautical Calculator!

    Do you have a great idea for a new calculator for use at sea that isn’t yet available on Nauticalculator? Let us know what kind of calculator you’d like: what should the input and output be, and what would you call it? Share your idea, and we’ll create it for you (yes, Captain, your name will be credited)!

    We can also create a custom calculator for use on your website, tailored to a specific route, sailing area, or vessel. Contact us to explore the possibilities!

    🌊 All Sea Condition Calculators

    Wave Height Calculator
    Calculate the wave height based on wind speed.

    Motion Sickness Risk Calculator
    Motion sickness risk based on movement and exposure time.

    🧭 All Navigation Calculators

    Lat & Long Finder
    Discover the latitude and longitude coordinates.

    Nautical Direction
    Calculate the nautical direction with an online compass.

    ⌛ All Time Calculators

    Boat Time Travel Calculator
    Calculate boat travel time based on speed and distance.

    🚢 All Speed Calculators

    Prop Slip Calculator
    Determine propeller efficiency based on boat speed and RPM.

    Boat Horsepower to Speed
    Easily convert boat horsepower to speed (miles per hour).

    Boat Speed Calculator
    Calculate boat speed using distance and travel time.

    💵 All Money Calculators

    Gas Savings Calculator
    Calculate fuel savings based on efficiency and distance.

    Boat Gas Mileage
    Easily calculate your boat’s gas mileage.

    Boat Depreciation
    Easily calculate the depreciation of your boat over time.

    Boat Fuel Consumption
    Easily calculate your boat’s fuel consumption.

    🔀 All Converters

    Sea Mile to KM Converter
    Convert sea miles to kilometers.

    KM to Sea Mile Converter
    Convert kilometers to sea miles.

    Knots to MPH Converter
    Convert knots to miles per hour.

    MPH to Knots Converter
    Convert miles per hour to knots.

    Horsepower to MPH
    Easily convert horspower to MPH.

    KMH to Knots Converter
    Convert kilometers per hour to knots.

    Knots to KMH Converter
    Convert knots to kilometers per hour.

    Mile to Nautical Mile
    Easily convert miles to nautical miles.

    Nautical Mile to Mile
    Easily convert nautical miles to miles.

    MPH to Horspower
    Easily convert MPH to horsepower.