English tools / Unit Converter
COMMON UNIT CONVERTER
Unit Converter
Convert common length, weight, and volume units with transparent conversion factors.
Supported conversions
Choose a direction for centimeters and inches, kilograms and pounds, liters and US gallons, or kilometers and miles.
1 inch = 2.54 centimeters
1 pound = 0.45359237 kilograms
1 US gallon = 3.785411784 liters
1 mile = 1.609344 kilometers
US gallons
The gallon option uses the US liquid gallon. Imperial gallons are a different volume and are not used here.
Frequently asked questions
Which gallon is used?
The calculator uses the US liquid gallon.
Can I enter negative values?
Yes for mathematical conversion, although a negative physical measurement may not be meaningful.
Are conversion factors rounded?
The stated standard factors are used before the displayed result is rounded.
Calculations run in your browser. Values are not uploaded or stored.