Length Converter

Enter a value and pick the units to convert between inches, centimetres, feet, metres, miles and kilometres.

Results

1 mi =
1.609344 km
Millimetre
1,609,344 mm
Centimetre
160,934.4 cm
Metre
1,609.344 m
Inch
63,360 in
Foot
5,280 ft
Yard
1,760 yd
Nautical mile
0.86897624 nmi
1 mi in km
1.609344

Screen sizes come in inches, flight altitudes in feet, road distances in miles. This converter handles nine units of length and distance.

The factors are exact by definition: 1 inch is 2.54 cm, 1 foot is 30.48 cm, 1 yard is 91.44 cm and 1 mile is 1,609.344 metres.

How to calculate Length conversion

  1. Enter the value you want to convert.
  2. Choose the units to convert from and to.
  3. Read the result and the same length in the other units.

Length conversion formula

  • 1 in = 2.54 cm
  • 1 ft = 12 in = 0.3048 m
  • 1 mi = 1,609.344 m
  • 1 nautical mile = 1,852 m

Length conversion example

5 miles is 5 × 1.609344 = 8.04672 km. A 55-inch TV has a diagonal of 55 × 2.54 = 139.7 cm.

Length conversion: common questions

How many cm are in an inch?

Exactly 2.54. The other way round, 1 cm is about 0.3937 inches.

How many metres are in a foot?

A foot is 0.3048 m, and a metre is about 3.281 ft. For height, 5 ft 9 in is 175 cm.

Is a mile the same as a nautical mile?

No. A statute mile is 1,609 m and a nautical mile is 1,852 m. Nautical miles are used at sea and in aviation.