Unit Converter

Convert between US customary and metric units instantly — inches to centimeters, pounds to kilograms, gallons to liters, mph to km/h, and more.

Free No sign-up Runs in your browser
1 inches = 2.54 centimeters
UnitValue
Millimeters25.4
Centimeters2.54
Meters0.0254
Kilometers0.0000254
Inches1
Feet0.08333333
Yards0.02777778
Miles0.00001578
Nautical miles0.00001371

How to use the Unit Converter

  1. Choose what you're measuring (length, weight, etc.).
  2. Enter a value and pick the 'from' and 'to' units.
  3. See the result plus a table of every other unit.

Frequently asked questions

How many centimeters are in an inch?

Exactly 2.54 centimeters.

How many pounds are in a kilogram?

About 2.20462 pounds.

Is a US gallon the same as a UK gallon?

No. A US gallon is 3.785 liters; an imperial (UK) gallon is 4.546 liters. This tool uses US gallons.

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