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Unit Converter
Convert length, mass, temperature, volume, area, time, data storage, and speed — with instant results and a one-tap swap. All in your browser, nothing uploaded.
Convert units
Result
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How it works
One base unit per family
Everything meets in the middle
Each family has a base unit — the metre, kilogram, second, byte and so on. Your value is first converted to the base, then out to the target unit.
Temperature gets its own math
Celsius, Fahrenheit and Kelvin share no simple factor, so they convert through the Celsius scale with exact offsets and slopes.
Decimal or binary storage
Data units come in both flavours — KB/MB/GB use powers of 1000, KiB/MiB/GiB use powers of 1024 — so drive sizes and OS reports both make sense.
Questions
Unit converter FAQ
Does the converter upload my numbers?
No. Every conversion is calculated in JavaScript on your device. Nothing you type is sent to a server, stored, or logged.
Why do gigabyte and gibibyte give different answers?
GB, MB and KB use decimal powers of 1000, while GiB, MiB and KiB use binary powers of 1024. Storage drives are usually sold in decimal units; operating systems often report the binary ones.
Which volume units does it use?
Metric units plus the US customary set — teaspoons, tablespoons, cups, fluid ounces, pints, quarts and gallons. Note the US gallon differs from the imperial one.