Converters
6 converters. Change lengths, weights and temperatures as you type. Each page shows the factor or the sum it uses.
- Unlimited
- No signup
- Private
- Works offline
All converters
6 tools · 3 groups · 6 ready
Length
4Weight & mass
1Temperature
1About these converters
The length and weight converters use exact factors, fixed by definition. The inch is exactly 25.4 mm and the pound is exactly 0.45359237 kg. So the only rounding is the number of decimal places you pick.
Celsius to Fahrenheit is not a single factor, because the two scales put zero in different places. Its page shows the whole sum, including the 32 it adds at the end.
Each converter works the answer out in the page as you type. Nothing goes to a server, so there is nothing to wait for and no limit on how many conversions you run.
- Precision
- Up to 10 decimal places for length and weight, and 4 for temperature.
- Direction
- The swap button reverses any conversion.
- Factors
- Exact by definition for length and weight.
- Offline
- Each converter keeps working once its page has loaded.
Frequently asked questions
Are the conversion factors exact?
Yes. The inch, the foot and the pound have exact definitions, agreed in 1959, and the converters use them. The only rounding is the number of decimal places you show.
Is there a limit on how many conversions I can run?
No. The sums run in your browser, with no account and no daily limit.
Do the converters work offline?
Yes, once a page has loaded. The sum runs in the page, so it needs no connection after that.
Do you round the result?
Only for display. The sum keeps full precision, and you choose how many decimal places to show.
Can I get feet and inches, or stone and pounds?
Yes, on the cm to feet, cm to inches and kg to lbs pages. Set the To field to Foot or Stone, and a second line under the answer shows feet and inches, or stone and pounds.