Convert between metric and imperial length units. Enter a value and pick the units.
Converted
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In the target unit.Usage Tip
Handy anchors: 1 inch = 2.54 cm, 1 foot ≈ 0.305 m, 1 mile ≈ 1.61 km, 1 meter ≈ 3.28 ft.
THE MATH
Convert to a base unit, then to the target:
result = value × (from factor ÷ to factor)
result = value × (from factor ÷ to factor)
Length units convert by fixed ratios. Metric scales in powers of ten; imperial uses inches, feet, yards, and miles.
One inch is defined as exactly 2.54 cm, the bridge between the two systems.
One inch is defined as exactly 2.54 cm, the bridge between the two systems.
Convert through a common base unit (here, meters) to go between any two units.
Metric prefixes scale by ten: milli, centi, base, kilo.
For long distances tiny rounding barely matters; for machining, use full precision.
Metric prefixes scale by ten: milli, centi, base, kilo.
For long distances tiny rounding barely matters; for machining, use full precision.