Unit Converter
Convert between common units of length, weight, temperature, and volume instantly.
· CalcFlow Editorial
Enter values above and click Calculate to see your results.
Results shown are estimates for informational purposes only. Nothing on CalcFlow is financial, tax, legal, or medical advice. Always consult a qualified professional before making important decisions.
What is a Unit Converter? A unit converter is a tool that converts a measurement value from one unit of measure to another using a fixed conversion factor or formula.
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Rule of Thumb
1 mile = 1.609 km | 1 kg = 2.205 lb | 0°C = 32°F (freezing) | 100°C = 212°F (boiling) | 1 gallon = 3.785 liters | 1 inch = 2.54 cm.
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Example Calculation
A 6-foot person is 6 x 0.3048 = 1.83 meters tall. A 180-pound person weighs 180 x 0.4536 = 81.6 kilograms.
Key Facts
- •The US uses the Imperial system (miles, pounds, Fahrenheit) while most of the world uses metric (km, kg, Celsius).
- •Temperature conversions are non-linear — you cannot simply multiply; Fahrenheit uses an offset (+32) as well as a scale factor.
- •US liquid measurements (cups, quarts, gallons) differ slightly from UK Imperial equivalents.
How to Use
- Select the category (Length, Weight, Temperature, or Volume).
- Select the unit you are converting FROM.
- Select the unit you are converting TO.
- Enter the value you want to convert.
- Click Calculate to see the converted result.
Formula
Length: 1 ft = 0.3048 m | Weight: 1 lb = 0.4536 kg | Temp: F = (C x 9/5) + 32 | Volume: 1 gal = 3.785 L| Conversion | Exact Factor | Common Shorthand |
|---|---|---|
| 1 meter | 3.28084 feet | roughly 3.3 feet |
| 1 kilometer | 0.621371 miles | roughly 0.6 miles |
| 1 kilogram | 2.20462 pounds | roughly 2.2 lbs |
| 1 inch | 2.54 centimeters | exactly 2.54 cm |
| 1 liter | 0.264172 gallons | roughly 0.26 US gal |
| 0°C (Celsius) | 32°F (Fahrenheit) | freezing point of water |
| 100°C (Celsius) | 212°F (Fahrenheit) | boiling point of water |
| 1 US gallon | 3.78541 liters | roughly 3.8 liters |