Universal Unit Converter
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Common questions
How accurate is this converter?
It uses the exact international definitions: 1 inch = 2.54 cm, 1 pound = 453.59237 g and 1 ounce = 28.349523125 g. Results are rounded to 10 significant digits.
How many cm are in an inch?
One inch is exactly 2.54 centimeters. Multiply inches by 2.54 to get cm, or divide cm by 2.54 to get inches.
How many ounces are in a pound?
There are 16 ounces in 1 pound (avoirdupois). That is the ounce used for food and body weight in the US.
Can I convert in both directions?
Yes. Press the swap button (⇄) to reverse the units instantly.
Is it free?
Yes. It is free, needs no sign-up, and everything is calculated in your browser.