Unit Converter
Convert length, mass, volume, temperature, speed, area, time, data, pressure, energy, power and fuel economy with exact factors.
Good to know
- Temperature and fuel economy use their own formulas; everything else is a factor ratio.
Common questions
Why does temperature need its own formula?
Temperature scales have different zero points, so conversion is an offset plus a factor, not a simple ratio.
How exact are the conversion factors?
Standard defined factors are used, with display rounding to six decimals. Repeated conversions can accumulate display rounding.
Why does fuel economy run backwards?
Lower L/100 km is better, while higher mpg is better, so the scales are inversely related rather than proportional.
Is this tool really free?
Yes. There is no account, no paywall and no usage limit. Tools App is funded by aumenso, the studio behind it.
Is anything I enter uploaded?
No. The tool runs in your browser tab; what you enter is never sent to us and never stored.
Need this built for your business?
aumenso builds websites, branding, SEO, GoHighLevel funnels and custom software for agencies and businesses across North America and Europe. These tools are the same team's work, given away free.