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Converter Pro
All-in-one converter for length, area and more. Fast, simple and easy to use.
Available on Android.
Free Unit Converter
Length, weight, temperature, area, volume, speed and data. Type a value and see it in every unit.
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All units
About the unit converter
This free unit converter changes values between common units of length, weight, temperature, area, volume, speed and data. Type a number, choose the unit you are converting from and to, and the result updates instantly, along with the same value in every other unit of that category.
To use it, pick a category, enter the value, and set the From and To units. Use the swap button to reverse them. The grid under the result lists every unit at once, which is handy when you are comparing, for example acres, cents and square feet for a plot of land.
It is useful for students, shoppers comparing sizes and weights, cooks switching between metric and US cups, anyone working with land measures or file sizes, and travellers converting speeds and temperatures. For a converter on your phone that works offline, see the app below.
Unit Converter FAQ
Which units can I convert?
Length, weight, temperature, area, volume, speed and data. Area includes acre, cent and guntha, weight includes quintal, and data includes both decimal (KB, MB, GB) and binary (KiB, MiB, GiB) units.
How accurate are the conversions?
The factors are the exact international definitions, such as 1 inch = 25.4 mm, 1 mile = 1,609.344 m and 1 pound = 0.45359237 kg. Results are shown to up to 10 significant digits.
What is the difference between GB and GiB?
A gigabyte (GB) is 1,000 megabytes, as used by storage makers. A gibibyte (GiB) is 1,024 mebibytes, which is how many operating systems count. Both are available so you can choose the one you need.
How does temperature conversion work?
Temperature uses formulas rather than a single factor: F = C x 9/5 + 32 and K = C + 273.15. The converter applies the right formula for any pair of Celsius, Fahrenheit and Kelvin.
Does it work offline or send my values anywhere?
The conversion runs in your browser and nothing you type is sent to a server.
Get the full app
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