Unit Converter
Convert between length, weight, volume, area, speed, and data units.
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Key Features
- Convert between hundreds of units across length, weight, volume, area, speed and more.
- Switch conversion direction instantly by swapping the from and to fields.
- Results update in real time as you type — no button press needed.
- Covers both metric and imperial systems as well as US customary units.
- Groups related units into clearly labelled categories for fast navigation.
- Handles very large and very small values with scientific notation output.
Frequently Asked Questions
How many centimetres are in an inch?
One inch equals exactly 2.54 centimetres. This is a defined, exact conversion under the international yard and pound agreement of 1959.
How do I convert kg to lbs?
Multiply kilograms by 2.20462 to get pounds. For example, 70 kg × 2.20462 = 154.32 lbs. This tool does the conversion automatically.
What is the difference between a US gallon and a UK gallon?
A US liquid gallon is approximately 3.785 litres, while a UK (imperial) gallon is approximately 4.546 litres — about 20% larger.