Unit Conversion Calculator
How to use the unit conversion calculator
Enter a number and pick a conversion, such as miles to kilometers, pounds to kilograms or Fahrenheit to Celsius. The calculator uses exact conversion factors, so you get a precise answer for cooking, travel, fitness or school.
Handy conversions
One mile is 1.609344 kilometers. One pound is 0.45359237 kilograms. One inch is exactly 2.54 centimeters, and one US gallon is about 3.785 liters. To convert Fahrenheit to Celsius, subtract 32 and multiply by five-ninths. For example, 98.6 degrees Fahrenheit is 37 degrees Celsius.
Tips
US gallons differ from UK gallons, and this calculator uses the US gallon. Ounces here are weight ounces, not fluid ounces. When precision matters, such as in medicine or engineering, check the result against an official source.
Frequently asked questions
How do I convert kilometers to miles quickly?
Multiply by 0.62. For a rough check, 10 kilometers is a little over 6 miles.
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Estimates for education only, not financial advice.