Unit Conversion Calculator
Free unit converter with search: type “10 miles to km” or pick a category to convert length, mass, temperature, area, volume, speed, time, pressure, energy, power, data and more.
Categories
No category matches that search — try a unit name such as “kg”, “gallon” or “knots”.
Length converter
Result
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All length units
| Unit | Value |
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Click a row to convert to that unit, or its value to copy it.
How to use the unit converter
- Type a conversion in the search box — “5 ft to cm”, “100 km/h in mph”, “350 F to C” — and the answer appears instantly. Press Open in converter to keep working with it.
- Or pick a category (length, mass, temperature, area, volume, speed, time, pressure, energy, power, force, data, angle, frequency or fuel economy), choose the two units and enter a value. The table underneath shows the same value in every unit of that category.
- Search also works on a single unit (“knots”, “psi”, “gallon”) — it filters the categories down to the ones that contain it.
- Use Copy link to share the exact conversion you have on screen.
Accuracy
Conversions use exact or internationally agreed factors (for example 1 inch = 25.4 mm, 1 mile = 1,609.344 m, 1 US gallon = 3.785411784 L). Months are 30.4375 days and years 365.25 days; Mach is taken at sea level (340.29 m/s). Everything is calculated in your browser and nothing is sent to a server.
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