Unit Converter

Convert between units instantly — length, weight, area, volume, speed, time, data storage, and temperature.

ResultEnter a value to convert

What This Converter Supports

Length

mm, cm, m, km, inches, feet, yards, miles

Weight

mg, g, kg, tonnes, ounces, pounds, stone

Area

sq m, sq km, sq ft, sq yd, acres, hectares, sq mi

Volume

ml, litres, cubic m, tsp, tbsp, cups, fl oz, gallons

Speed

m/s, km/h, mph, knots, ft/s

Time

seconds, minutes, hours, days, weeks, months, years

Data

bits, bytes, KB, MB, GB, TB

Temperature

Celsius, Fahrenheit, Kelvin

Worked Example — 100 mm to inches

100 mm = 3.937 in

Frequently Asked Questions

A tool that converts a value from one unit of measurement to another within the same category — like millimeters to inches, or kilograms to pounds — instantly, without doing the multiplication by hand.

Common Mistakes to Avoid

  • Not every unit type is supported. Torque, pressure, density, power, and currency aren't included — only the eight categories above.
  • Temperature doesn't scale like the others. Celsius, Fahrenheit, and Kelvin use their own conversion formulas, not a shared base-unit multiplier the way length or weight do.

References

  • International System of Units (SI)
  • National Institute of Standards and Technology (NIST)

Last reviewed July 2026

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