Length Converter

Convert any length into every common metric and US unit at once.

Millimeters1,609,344
Centimeters160,934.4
Meters1,609.344
Kilometers1.609344
Inches63,360
Feet5,280
Yards1,760

How to use it

  1. Enter a number and choose its unit.
  2. All other units are listed below.

Formula

Example

1 mile = 1,609.344 m = 1.609 km. A 10K race is 10 ÷ 1.609344 ≈ 6.21 miles.

Questions

How many cm is 5 ft 10 in?

70 inches × 2.54 = 177.8 cm.

Are these exact?

Yes. The inch has been defined as exactly 2.54 cm since 1959.

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Last reviewed 2026-10-10. Found a mistake? Tell us.