Inches to CM Converter

Type a number of inches and this converter shows the answer in centimeters instantly (1 in = 2.54 cm). Below the converter you will find a ready-made in to cm table, and further down the formula with a worked example.

Inches are everywhere in American products: TV and monitor diagonals, phone screens, bicycle wheels, pipe and bolt sizes, jeans waist and inseam, and picture frames. Converting to centimeters makes it easy to compare with metric listings, plan furniture layouts in a metric floor plan or understand how big a 65-inch TV really is (165.1 cm diagonal).

How to use the Inches to CM tool

1. Enter the value in inches in the Value box. Decimals such as 5.5 are fine.
2. The result in centimeters appears straight away, rounded to six significant digits.
3. Check the formula line under the result to see exactly how it was calculated.
4. Press ⇄ to convert centimeters back to inches, or pick any other unit from the lists.
5. Use Copy result, or look up common values in the conversion table.

Why use ToolOrca Inches to CM

• Exact factor: 1 in = 2.54 cm
• Conversion table: in to cm
• Formula and worked example included
• Instant result as you type
• Converts to every other length unit too
• Free, private and works offline

How to convert inches to centimeters

Since the international yard and pound agreement of 1959, one inch is defined as exactly 2.54 centimeters. A centimeter is one hundredth of a meter. So 1 in = 2.54 cm exactly, and 1 cm = 0.393700787 in.

To convert inches to centimeters, multiply the number of inches by 2.54.

Worked example: 10 in × 2.54 = 25.4 cm.

Quick mental math for in to cm

Multiply by 2.5 and add a little: 10 in × 2.5 = 25, the exact answer is 25.4 cm. For whole numbers, inches × 2.54 is easy as inches × 2.5 plus inches × 0.04.

Need the opposite direction? Use the centimeters to inches converter, or switch units with the ⇄ button above.