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The free online tool to convert units instantly. Use this free unit conversion tool to convert between length, weight, temperature, volume, area, time, speed, and data storage — no sign-up needed.
Select a category from the tabs at the top — Length, Weight, Temperature, and more. Then choose your starting unit in the From dropdown and your target unit in the To dropdown. Type any number into the Amount field and the result appears instantly, no button press needed.
Use the ⇄ swap button between the two dropdowns to flip the conversion direction in one click. This is handy when you want to reverse a calculation — for example, switch from converting miles to kilometers back to kilometers to miles without resetting everything.
The Common conversions panel below the converter updates for each category, showing six frequently used reference values so you can quickly sanity-check a result or find a ballpark without typing anything.
Select the category (e.g. Length), pick your source unit in the From dropdown and the target unit in the To dropdown, then type your value into the Amount field. The converted result appears in real time — no need to press a button.
There are exactly 2.54 centimeters in one inch. This is a defined constant — 1 inch = 2.54 cm by international agreement since 1959.
Multiply the Celsius value by 9/5, then add 32. In formula form: °F = (°C × 1.8) + 32. For example, 100 °C = (100 × 1.8) + 32 = 212 °F. To go the other way: °C = (°F − 32) ÷ 1.8.
One kilogram equals approximately 2.20462 pounds. Equivalently, one pound equals about 0.453592 kilograms.
In computing, 1 gigabyte (GB) equals 1,024 megabytes (MB) using binary prefixes (as reported by most operating systems). Under the SI decimal definition, 1 GB = 1,000 MB. This converter uses the binary (1024) definition common to OS file sizes.
Yes, completely free. No account, no sign-up, and no usage limit. All conversions happen locally in your browser — no data is sent to any server.