Length Converter

Meters, feet, inches, kilometers, miles — converted exactly.

Quick answer: Convert length units online. Calculate meters, feet, inches, kilometers, and miles accurately using international measurement standards.

Millimeters → Centimeters0.1

exact international definitions — computed locally

Convert between every common length unit, metric and imperial, with exact definitions.

How it works

  1. Select your starting length unit and your target length unit.
  2. Input the distance value you wish to translate.
  3. The engine multiplies by the exact SI definition factor for the result.

Frequently asked questions

How many feet in a meter?

About 3.28084 — exactly 1 ÷ 0.3048.

Miles vs kilometers quick rule?

Multiply miles by 1.609. For a head estimate, add 60%.

Why is the inch exactly 2.54 cm?

By international agreement (1959), the inch is defined as exactly 25.4 mm.

More in Unit Converters