Unit Converter
Convert between length, weight, temperature, area, volume, speed, time, data, pressure and energy.
Free Online Unit Converter
Convert length, weight, temperature, area, volume, speed, time, digital storage, pressure, and energy instantly — no downloads, no sign-up. Type a value, pick your units from either side, and the result updates automatically as you type.
Which Units Are Supported?
This converter covers the units people actually search for day to day: meters to feet, kilograms to pounds, Celsius to Fahrenheit, gallons to liters, MB to GB, and dozens more across 10 categories. Switch the "Conversion Type" dropdown to jump between them.
How Accurate Is It?
Every conversion factor is based on standard international definitions (SI units, US customary units, and internationally recognized constants), with results shown to 8 significant digits — accurate enough for cooking, engineering estimates, travel planning, or homework.
Popular Conversions
Kilometers to Miles
| 1 km | 0.621 mi |
| 5 km | 3.107 mi |
| 10 km | 6.214 mi |
| 42.195 km (Marathon) | 26.219 mi |
| 100 km | 62.137 mi |
Celsius to Fahrenheit
| 0°C | 32°F |
| 20°C | 68°F |
| 25°C | 77°F |
| 37°C (Body temp) | 98.6°F |
| 100°C | 212°F |
Kilograms to Pounds
| 1 kg | 2.205 lb |
| 5 kg | 11.023 lb |
| 10 kg | 22.046 lb |
| 50 kg | 110.231 lb |
Liters to US Gallons
| 1 L | 0.264 gal |
| 5 L | 1.321 gal |
| 20 L | 5.283 gal |
MB to GB
| 1024 MB | 1 GB |
| 5000 MB | 4.88 GB |
| 10000 MB | 9.77 GB |
Frequently Asked Questions
Is this unit converter accurate?
Yes. All conversion factors are based on standard SI and US customary definitions, with results shown to 8 significant digits.
Do I need to install anything to use it?
No. It runs entirely in your browser using JavaScript — no app, no sign-up, and no internet connection required after the page loads.
Can I convert temperature between Celsius, Fahrenheit, and Kelvin?
Yes. Select "Temperature" from the dropdown, then choose any of the three scales on either side of the converter.
Which categories of units are supported?
Length, weight, temperature, area, volume, speed, time, digital storage, pressure, and energy — ten categories in total.