Convert units instantly across length, mass, volume, area, time, temperature, pressure, energy, power, speed, frequency, data, and angles. Shareable links open the exact conversion you want.
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About this unit converter
This page is the main converter used by our dedicated landing pages (e.g., kg to lbs, cm to inches, litres to gallons). Choose a category, select units, type a value, and the result updates instantly. Use Share to copy a link that opens the same conversion.
Unit Converter FAQ
How accurate are the results?
We use standard unit definitions and keep higher precision internally. Choose your preferred display precision (default 3 dp).
Can I type unit names instead of codes?
Yes. Start typing “kilograms”, “metres”, “litres”, “fahrenheit”, “knot”, etc. The converter is case-insensitive and accepts common spellings.
What formats can I enter?
We accept decimals, commas, spaces, scientific notation (e.g., 1e6), and simple fractions (e.g., 1/2).
Why do you have US and UK gallons?
They are different sizes. We keep them separate (galUS and galUK) to prevent mistakes in fuel, brewing, and tank conversions.