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CALCULATOR · Converters

Length Converter

Convert millimeters to miles and everything between with exact international factors.

Show formula
base = factor × value (exact SI/international)

Inputs

Result

Your result appears here

Enter Value to convert and the result fills in as you type.

How it works

  1. Enter the value you want to convert.
  2. Pick the source and target units — use ⇄ to swap instantly.
  3. Read the converted result with full precision.

Frequently asked questions

Which factors are used?

Internationally agreed exact values: 1 mile = 1609.344 m, 1 inch = 2.54 cm, 1 nautical mile = 1852 m. No rounded approximations.

How many digits are shown?

Up to eight significant figures; tiny and huge values fall back to scientific notation.

How many centimetres are in an inch?

Exactly 2.54 cm. The inch has been defined as 25.4 mm since 1959.

How many feet are in a metre?

3.28084 ft. A foot is exactly 0.3048 m, so a metre is 1 ÷ 0.3048 feet.

Examples

How many centimetres is 5 ft 10 in?
177.8 cm: 5 ft is 152.4 cm and 10 in is 25.4 cm.
How many miles is 10 km?
6.2137 miles (10 ÷ 1.609344).
How many feet is 100 metres?
328.08 ft (100 ÷ 0.3048).

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