Calculate nautical mile distances between coordinates, convert miles, km and meters, and estimate travel time, fuel, CO2, and arrival.

Nautical Mile Calculator

Enter coordinates or a distance, then click Calculate.

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Nautical Mile Formula

The following relationships can be used to convert between nautical miles, statute miles, and kilometers.

1~\text{NM} = 1.15078~\text{mi}
  • Where NM is a nautical mile
  • mi is a statute mile (mile)
1~\text{NM} = 1.852~\text{km}
  • Where NM is a nautical mile
  • km is kilometres

To calculate nautical miles from statute miles, divide the miles by 1.15078 (equivalently, multiply by 0.868976).

Nautical Mile Definition

A nautical mile is a unit of distance used in marine and air navigation. It is defined as exactly 1,852 meters (1.852 km), which is approximately one minute of latitude (one minute of arc along a meridian). This is about 1.15078 statute miles.

A knot is a unit of speed equal to one nautical mile per hour, so traveling at 1 knot for 1 hour covers 1 nautical mile.

Both knots and nautical miles are commonly used in maritime navigation and aviation. Since ships and aircraft travel great distances, using standard units tied to Earth-based navigation helps standardize distance and speed measurements.

Nautical Mile Example

How to calculate a nautical mile?

  1. First, measure the direct distance.

    Measure the direct distance in miles or kilometers.

  2. Next, convert to nautical miles.

    Using the formulas above, calculate the nautical miles.

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