Tool desk / 47 live
Free online calculators and converters
Each tool shows its answer, its formula and a worked example you can check. Open one and use your own numbers.
Tools
- Percentage calculatorCalculators
20% of 25050
- Loan calculatorCalculators
£200,000 at 5.5% over 25 years£1,228 a month
- BMI calculatorCalculators
70 kg at 175 cmBMI 22.9
- Age calculatorCalculators
born 14 Mar 1990, on 1 Jan 202635 years, 9 months
- cm to inchesConverters
1 cm0.3937 in
- feet to cmConverters
5 ft 10 in177.8 cm
- cm to feetConverters
170 cm5 ft 7 in
- kg to lbsConverters
70 kg154.3 lb
Collections
01 / Collection
Calculators
Free calculators for common questions about percentages, repayments, health and dates. Each one focuses on a single job and explains the result clearly.
4 tools
02 / Collection
Converters
Free converters for moving between common units without a formula or lookup table. Live fields make it easy to work in either direction.
5 tools
03 / Collection
Image tools
Format conversion that happens on your own machine. Your picture is decoded by the browser you are reading this in, which is why there is no upload bar and no wait.
15 tools
04 / Collection
Text tools
Counting and reshaping, done as you type. Nothing you paste is sent anywhere, which matters more than it sounds when the thing you are pasting is a covering letter.
7 tools
05 / Collection
Developer tools
Encoders, hashes, formatters and generators, all running in the tab you have open. Paste a token in and it stays in front of you, because there is nowhere here for it to be sent.
12 tools
06 / Collection
Video and audio
ffmpeg, compiled to WebAssembly and running in the tab you have open. The converter is a 32 MB download the first time and nothing after that, which is the honest cost of not sending your video to a server.
4 tools
- Free tools
- 47
- Categories
- 06
- Accounts required
- 00