6XC

Length Unit Converter

Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles and nautical miles — all at once, live.

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Millimeter (mm)—
Centimeter (cm)—
Meter (m)—
Kilometer (km)—
Inch (in)—
Foot (ft)—
Yard (yd)—
Mile (mi)—
Nautical Mile (nmi)—

Every Length Unit, At Once

Type a value in any unit and see it instantly converted to all the others — metric (mm to km) and imperial/nautical (inches to nautical miles) side by side, so you don't need to pick a "from" and "to" pair first.

Frequently Asked Questions

How precise are the conversions?

Exact, using standard international definitions (1 inch = 2.54 cm exactly, 1 mile = 1609.344 m exactly). Results are rounded for display but computed at full floating-point precision.

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