What is the Conversion Calculator?
A unit conversion calculator instantly converts between units of length, weight, temperature, volume, area, speed and more — including metric ↔ imperial conversions for everyday tasks and engineering work.
All calculators
Conversion Calculator
Convert between units of length, weight, temperature and volume.
Inputs
Result
1 Meter (m)
3.28084
= Foot (ft)
All Conversions
| Unit | Value |
|---|---|
| Meter (m) | 1 |
| Kilometer (km) | 0.001 |
| Centimeter (cm) | 100 |
| Millimeter (mm) | 1,000 |
| Mile (mi) | 0.00062137 |
| Yard (yd) | 1.0936133 |
| Foot (ft) | 3.2808399 |
| Inch (in) | 39.37007874 |
Conversion Calculator formula
Most conversions use a multiplicative factor: result = input × conversion_factor (e.g. 1 inch = 2.54 cm exactly). Temperature uses an offset: °F = °C × 9/5 + 32, °C = (°F − 32) × 5/9, K = °C + 273.15.
How to use the Conversion calculator
- 1Pick the measurement type: length, weight, temperature, volume, area or speed.
- 2Choose the unit you are converting from and enter the value.
- 3Choose the unit you are converting to.
- 4Click Convert to see the result with full precision.
- 5Swap the units with one click to convert back.
Example calculation
Converting 10 inches to centimeters: 10 × 2.54 = 25.4 cm. Converting 100 °F to Celsius: (100 − 32) × 5/9 = 37.78 °C. Converting 1 mile to kilometers: 1 × 1.609344 = 1.609 km. Converting 1 gallon (US) to liters: 1 × 3.78541 = 3.785 L.
Frequently asked questions
- How do I convert Celsius to Fahrenheit?
- Multiply the Celsius temperature by 9/5 (1.8) and add 32. For 20 °C: 20 × 1.8 + 32 = 68 °F. This calculator handles the offset automatically — just pick the units.
- How many centimeters are in an inch?
- Exactly 2.54 cm = 1 inch, by international definition. To convert inches to centimeters multiply by 2.54; to convert centimeters to inches divide by 2.54 (or multiply by 0.3937).
- How do I convert kilograms to pounds?
- Multiply kilograms by 2.20462 to get pounds (1 kg = 2.20462 lb). To go the other way, multiply pounds by 0.453592. For everyday use, 1 kg ≈ 2.2 lb is close enough.
- What is the difference between US and imperial gallons?
- 1 US gallon = 3.78541 liters; 1 imperial (UK) gallon = 4.54609 liters. The imperial gallon is about 20% larger. This calculator uses US gallons by default — select imperial gallons if you are in the UK.
- How do I convert miles per hour to kilometers per hour?
- Multiply mph by 1.609344 to get km/h. So 60 mph = 96.56 km/h. To convert km/h to mph, divide by 1.609344 (or multiply by 0.621371): 100 km/h ≈ 62.14 mph.
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