Length converter

Convert common metric, imperial, and US customary length units with a shared metre base.

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The length converter handles metres, kilometres, centimetres, millimetres, inches, feet, yards, and miles. It is useful when a measurement is supplied in a unit that does not match a drawing, journey plan, or product specification.

When to use this tool

  • Compare room or furniture dimensions stated in metres and feet.
  • Translate road distances between kilometres and miles.

How to use

  1. Enter a finite length value.
  2. Choose the unit used by the input and the unit required for the result.
  3. Review the converted value and copy it if needed.

Example

Metres to feet

Entering 1 metre and choosing feet returns approximately 3.280839895 feet.

How it works

  • Each unit is represented as a fixed factor relative to one metre; the input is multiplied by its source factor and divided by the destination factor.

Limits and notes

  • Displayed results are rounded to at most 10 fractional digits, so retain the raw source measurement for precision-sensitive work.
  • This tool converts length only; it does not convert area or volume by applying squared or cubed factors.

Frequently asked questions

How many feet are in one metre?

The converter uses the exact international foot definition of 0.3048 metre, so one metre is about 3.280839895 feet.

Can I enter a negative length?

The calculator accepts any finite number, including negative values, although a negative physical length may not make sense for the task.

References

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