One box for length, weight, volume, area, speed, time, data storage, energy and pressure, with the conversion factor printed under every answer.
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This unit converter handles nine kinds of measurement in one place: length, weight and mass, volume, area, speed, time, data storage, energy and pressure. Pick a family, type a value, choose the unit you have and the unit you want, and the answer appears with the exact factor used printed underneath it.
Four picks and one number. That is the whole job.
Real tasks rarely stay inside one family. A recipe needs volume for the milk and weight for the flour. A hosting plan quotes data storage per month and a transfer speed per second. A car listing mixes speed, length and pressure in a single spec sheet.
Switching families here takes one click, and your value stays put while you do it. You can check the same number against a second family without retyping anything or opening another tab.
The nine families cover the units most people meet in daily work: metres and miles, kilograms and pounds, litres and gallons, hectares and acres, hours and weeks, megabytes and gibibytes, joules and kilowatt hours, bar and pounds per square inch.
Most conversion mistakes are not bad maths. They are quiet mix-ups between units that share a name, and the label on the unit matters as much as the number itself.
Gallons are the classic trap. A US gallon is 3.78541 litres, while a UK gallon is 4.54609 litres, and a fuel economy figure built on the wrong one is off by about a fifth. This tool lists them as separate entries, and the same goes for US and UK fluid ounces, which also differ.
Tons split three ways. A metric tonne is 1,000 kilograms, a US ton is 2,000 pounds, and a UK long ton is 2,240 pounds. All three appear here under their full names so a shipping weight never rides on a guess.
Data units split two ways. Storage makers and network speeds count a kilobyte as 1,000 bytes, while memory and operating systems count a kibibyte as 1,024 bytes. Both families are here, each under its proper name, KB for the 1,000 family and KiB for the 1,024 family.
Temperature is missing on purpose. Its scales do not share a zero point, so a plain factor gives wrong answers, and it needs formulas instead. It has its own converter page built for that job.
Everything runs in your browser. Your numbers are never uploaded, stored or shared, there is no sign-up, and there is no cap on how many conversions you run.
Celsius and Fahrenheit start at different zero points, so converting between them takes a formula with an offset, not a single factor. Temperature has its own page here that handles all five scales properly.
A US gallon is 3.78541 litres and a UK gallon is 4.54609 litres. The tool lists both as separate entries so you always know which one your answer used.
Both exist. A kilobyte (KB) is 1,000 bytes in the storage and network convention, and a kibibyte (KiB) is 1,024 bytes in the memory convention. This converter carries both families with their proper names.
All three, each named: the metric tonne at 1,000 kilograms, the US ton at 2,000 pounds, and the UK long ton at 2,240 pounds. Pick the one your document actually means.
So you can check the working. If an answer looks off, the factor shows exactly what the tool multiplied by, and a wrong unit choice shows up at a glance.
No. The conversion runs entirely in your browser, nothing leaves your device, and you can run as many conversions as you like without an account.
Same rules as this one: free, in your browser, with nothing uploaded.
Exact age in years, months and days for any form.
Marks, discounts and change, worked out properly.
Body mass index from height and weight, with its range.
Monthly loan payment, total interest and full cost.
The final price after a discount, and what you saved.
Add or remove GST at the rate your invoice uses.
Add tax to a price or pull it back out.
Work out a tip and split a bill between people.