Inch is CM
Exact measurement conversion

Inch to CM Converter

Convert inches to centimeters instantly, with formulas, examples, and common size references.

in
cm
10 in = 25.4 cm
10 × 2.54 = 25.4
1 inch = 2.54 cm
The inch has been defined as exactly 2.54 centimeters since 1959.
inches × 2.54 = centimeters

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Inch to cm chart

Scan common values from 1 to 100 inches and open a detailed conversion.

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Compare centimeters with decimal and fractional inch equivalents.

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Frequently asked questions

How many cm is 1 inch?

One inch is exactly 2.54 centimeters. This is a defined international conversion, not an estimate.

How do you convert inches to cm?

Multiply the number of inches by 2.54. For example, 10 × 2.54 = 25.4 cm.

Is 10 inches exactly 25.4 cm?

Yes. Because one inch is exactly 2.54 cm, 10 inches is exactly 25.4 cm.

Why do some websites round inch to cm conversions?

Long decimal results are often rounded for readability. The converter here keeps up to four decimal places while using the exact 2.54 conversion factor.

What is the easiest way to convert inches to cm?

Use the converter above for an instant answer, or multiply inches by 2.54 when calculating by hand.

Related tools

Learn the method in the inch-to-cm formula guide, compare inches and centimeters, or see how large 10 inches, 12 inches, and 15 inches are.