Calculators

Unit Converter

Choose a category — Length, Weight, Temperature or Data — pick your from and to units, and convert instantly with correct factors and temperature offset formulas, plus a handy reference of common conversions.

Examples

Input
5 km to mi
Output
3.106856 mi
Input
100 C to F
Output
212 F

How it works

Four kinds of unit are covered. Length, weight and data are converted with exact factors (an inch is 2.54 cm, a pound is 453.59237 g); temperature uses the offset formulas. Results are rounded to six decimal places.

Units available
CategoryUnits
Lengthmm, cm, m, km, in, ft, yd, mi
Weightmg, g, kg, tonne, oz, lb
Temperature°C, °F, K
DataB, KB, MB, GB, TB

Data units step by 1,024, so 1 KB is 1,024 bytes. Drive makers count in steps of 1,000, which is why a “1 TB” drive shows as about 931 GB. The tonne is the metric tonne of 1,000 kg. Temperature: °F = °C × 9 ÷ 5 + 32, and K = °C + 273.15.

How to use Unit Converter

Select a category
Switch between Length, Weight, Temperature and Data.
Choose your units
Pick the unit to convert from and the unit to convert to.
Enter a value
Type a number to see the result and common conversions.

Why use this tool

Four measurement categories
Accurate temperature offsets
Common conversions reference
Instant, offline conversion

Frequently asked questions

Length (mm–mi), Weight (mg–lb), Temperature (C/F/K) and Data (B–TB), covering metric and imperial.

Data units use binary multiples (1 KB = 1024 bytes), as used by most operating systems.

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