How Many cm in an Inch?

There are 2.54 centimeters in an inch. This is an exact conversion factor used internationally.

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How many cm in an inch? — see the answer and conversion table below.

Use the related converter below for custom values.

Formula

Answer: There are 2.54 centimeters in an inch. This is an exact conversion factor used internationally.

Example

Question: How many cm in an inch? Answer: There are 2.54 centimeters in an inch. This is an exact conversion factor used internationally.

How to Use

  1. Read the direct answer at the top of the page
  2. Check the conversion table for common values
  3. Use the related converter for custom values
  4. Browse the FAQ for common follow-up questions

Frequently Asked Questions

Is 2.54 cm exactly 1 inch?

Yes. Since 1959, 1 inch has been defined as exactly 2.54 centimeters. This is an international standard.

How many cm in 10 inches?

There are 25.4 cm in 10 inches (10 x 2.54).

How many inches in 1 cm?

There are 0.3937 inches in 1 centimeter.

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Author: Calczy Editorial Team Reviewed by: Calczy Editorial Team Last updated: 2026-10-09

This page was reviewed for accuracy by the Calczy editorial team. Our editorial process follows our editorial policy to ensure reliable, up-to-date conversion tools and reference content.