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
5 km to mi
3.106856 mi
100 C to F
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.
| Category | Units |
|---|---|
| Length | mm, cm, m, km, in, ft, yd, mi |
| Weight | mg, g, kg, tonne, oz, lb |
| Temperature | °C, °F, K |
| Data | B, 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
Why use this tool
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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