Convert length, weight, temperature, area, volume, speed, time, data, pressure and energy instantly — no account, no signup, no cost. 100% free and browser-based.
Our free unit converter covers length, weight, temperature, area, volume, speed, time, digital data, pressure and energy. Each category includes all major metric and imperial units for instant, accurate conversion results.
Everything runs in your browser — your values are never sent to any server. There's nothing to sign up for and no personal data is collected. Simply enter your numbers and get results in milliseconds.
Every conversion shows the formula used, so you can learn and verify. We use standard SI and imperial conversion factors. Results are shown to high precision and also converted into several related units simultaneously.
Select "Length" as your category, choose "Kilometre (km)" as the From unit and "Mile (mi)" as the To unit, enter your value and click Convert. 1 kilometre = 0.621371 miles.
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32: °F = (°C × 9/5) + 32. To convert back, subtract 32 and multiply by 5/9: °C = (°F − 32) × 5/9. Our calculator handles this automatically including Kelvin.
The data category supports Bit, Byte, Kilobyte (KB), Megabyte (MB), Gigabyte (GB), Terabyte (TB) and Petabyte (PB). All conversions use the standard binary definition where 1 KB = 1,024 Bytes.
Yes. Select "Weight / Mass" as your category, choose "Kilogram (kg)" as the From unit and "Pound (lb)" as the To unit. 1 kilogram = 2.20462 pounds. You can also swap units with one click to convert in the reverse direction.
We use precise scientific conversion factors (up to 15 significant figures) and display results to up to 8 decimal places. For everyday use this far exceeds the precision needed. The formula used in each conversion is also shown for full transparency.
Yes, completely free — no account, no login, no subscription. The tool works entirely in your browser with no data sent to any server.