Convert between 100+ units across 10 categories — length, weight, temperature, area, volume, speed, time, digital storage, pressure, and energy. Instant, free, and private.
1 mile = 1.609 km
1 foot = 0.3048 m
1 inch = 2.54 cm
1 yard = 0.9144 m
1 pound = 0.4536 kg
1 ounce = 28.35 g
1 kg = 2.205 lb
1 stone = 6.35 kg
0°C = 32°F
100°C = 212°F
98.6°F = 37°C
0°C = 273.15 K
1 gal (US) = 3.785 L
1 liter = 0.264 gal
1 cup = 236.6 mL
1 fl oz = 29.57 mL
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Length, weight, temperature, area, volume, speed, time, data, pressure & energy.
Comprehensive coverage of metric, imperial, and scientific units.
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Choose from 10 categories — Length, Weight, Temperature, Area, Volume, Speed, Time, Digital Storage, Pressure, or Energy.
Type the number you want to convert in the "From" field. Use the quick presets (1, 10, 100, 1K, 10K) for instant values.
Choose the unit you're converting from and the unit you're converting to. The result appears instantly.
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💡 Pro Tip: Click the ⇅ button to instantly swap the "From" and "To" units — perfect for reverse conversions.
A unit converter is a tool that transforms a measurement expressed in one unit into its equivalent in another unit. Whether you need to convert kilometers to miles for travel, kilograms to pounds for fitness, or Celsius to Fahrenheit for cooking, our free online converter handles all common measurement categories instantly — no app, no download, no signup required.
| Category | From | To | Conversion Factor |
|---|---|---|---|
| Length | 1 kilometer | Miles | 0.621371 mi |
| Length | 1 foot | Meters | 0.3048 m |
| Length | 1 inch | Centimeters | 2.54 cm |
| Weight | 1 kilogram | Pounds | 2.20462 lb |
| Weight | 1 pound | Kilograms | 0.453592 kg |
| Temperature | 100°C | Fahrenheit | 212°F |
| Temperature | 0°C | Kelvin | 273.15 K |
| Volume | 1 US gallon | Liters | 3.78541 L |
| Speed | 1 mph | km/h | 1.60934 km/h |
| Digital Storage | 1 GB | Megabytes | 1024 MB |
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