How precise are the conversions?

We use the official SI definitions: 1 inch = 0.0254 m, 1 mile = 1609.344 m. Results show up to 8 significant digits.

What is a nautical mile?

A nautical mile is exactly 1852 metres — one minute of arc along a meridian. It is used in aviation and shipping.

Very small or very large numbers are shown in scientific notation for readability.

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Convert any length between metric and imperial units: millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and nautical miles.

Millimeters (mm)

Centimeters (cm)

Meters (m)

Kilometers (km)

Inches (in)

Feet (ft)

Yards (yd)

Miles (mi)

Nautical miles