Length Converter
Convert between metric and imperial length units.
Result
3.2808399
How it works
Enter a value, pick the source and target units, and the conversion updates as you type.
When this question comes up
Length conversion comes up in DIY and construction more than anywhere else: buying timber in feet while drawing in metres, or ordering cable by the metre from a supplier who quotes in feet. Clothing and shoe sizing use it too, though the nominal size there is a label rather than a measurement.
Rules and limits
- Exact international definitions are used: 1 inch = 25.4 mm, 1 foot = 0.3048 m, 1 mile = 1609.344 m.
- Results show up to 8 significant digits with trailing zeros trimmed.
Worked example
1 mi = 1.609344 km · 6 ft = 182.88 cm
Checking the result by hand
Use the exact definitions and round only at the end: 1 inch = 25.4 mm, 1 foot = 0.3048 m, 1 mile = 1609.344 m. Convert to metres first, then to the target unit. Rounding in the middle is the usual reason two people get slightly different answers for the same measurement.
FAQ
How precise are the results?
Up to 8 significant digits, with trailing zeros removed.