How to use the Unit Converter tool
3 simple steps · under a minute
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Pick a category
Choose what you are measuring: length, weight, temperature, area, volume, speed, time or data.
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Choose the units
Select the unit to convert from and the unit to convert to. Use the swap button to flip them.
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Type a value
The converted value appears instantly, along with the conversion formula.
About Unit converter
This all-in-one unit converter handles the measurements you meet every day: length and distance, weight and mass, temperature, area, volume, speed, time and digital storage. Pick a category, choose your units and type a number to get an instant, accurate result.
The converter uses exact international definitions (for example, 1 pound = 0.45359237 kg), so results are accurate for school, work, cooking and travel.
8 categories, 60+ units
From millimetres to miles, grams to stones, and bytes to gibibytes.
Metric and imperial
Converts between metric, US customary and imperial units.
Exact factors
Uses the official international conversion factors, such as 1 inch = 2.54 cm exactly.
Frequently asked questions
How accurate is this unit converter?
It uses the exact international conversion factors and shows results to six significant digits, which is accurate enough for almost any purpose.
Are US and UK units the same?
Length and weight units are the same. Volume units differ: this converter uses US gallons, pints and cups.
What is the difference between MB and MiB?
A megabyte (MB) is 1,000,000 bytes. A mebibyte (MiB) is 1,048,576 bytes (1024 × 1024). Operating systems often show MiB but label it MB.
How do I convert temperature?
Choose the Temperature category. Celsius to Fahrenheit is °F = °C × 9/5 + 32.