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Unit Converter
Pick a category, type a number, see every equivalent.
Temperature works differently
Every other unit converts by a fixed ratio, but temperature scales have different zero points — 0 °C is not 0 °F. That's why temperature needs its own formula and multiplying alone gives the wrong answer.
Exact definitions, not approximations
An inch is defined as exactly 2.54 cm, and a pound as exactly 0.45359237 kg. These aren't rounded values — they're the legal definitions, so conversions here are exact rather than close enough.
Digital storage: 1000 or 1024?
This converter uses 1024, which is how operating systems report file sizes. Drive manufacturers count in 1000s, and that mismatch is exactly why a "1 TB" drive shows up as roughly 931 GB in your file browser.
Frequently asked questions
How many centimetres in an inch?
Exactly 2.54. This is a legal definition rather than a rounded approximation, so conversions between inches and centimetres are exact.
Why does temperature behave differently?
Temperature scales have different zero points, so converting requires both multiplication and an offset. A simple ratio gives the wrong result.
Does it use 1000 or 1024 for data sizes?
It uses 1024, matching how operating systems display file and drive sizes.
How precise are the results?
Results are shown to six decimal places, which is far beyond what everyday conversions need.