Length Converter

Since 1959 the inch, foot, yard and mile have been defined exactly in metres, so conversions between metric and imperial lengths are exact, not approximations.

  • Last updated
  • Formula tested against reference values

Your numbers

Result

Result
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Calculating…

Unit
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Full table

How to use this calculator

  1. Enter or choose value.
  2. Enter or choose from.
  3. Enter or choose to.
  4. The result updates as you type. Use Copy result or Share to keep it.

Formula

Result=Value×metres per “from” unitmetres per “to” unit

Result = Value × (metres per “from” unit) ÷ (metres per “to” unit)

1 in
0.0254 m
1 ft
0.3048 m
1 yd
0.9144 m
1 mi
1,609.344 m
1 nmi
1,852 m

Worked example

  1. 1 mile = 1,609.344 m.
  2. 1 foot = 0.3048 m.
  3. 1,609.344 ÷ 0.3048 = 5,280.

One mile is exactly 5,280 feet.

What the result means

The table below the result shows the value in every unit at once, which is useful for checking a conversion at a glance.

Assumptions and limits

  • International (not US survey) feet and miles.
  • Results are shown to 12 significant figures.

Questions

How many centimetres are in an inch?

Exactly 2.54 cm.

How do I convert feet and inches to centimetres?

Multiply the feet by 30.48 and the inches by 2.54, then add. 5 ft 9 in = 152.4 + 22.86 = 175.26 cm.

Sources