Practical measurement guide
How to Convert Inches to CM
Learn the exact inches-to-cm formula, see worked examples, and understand when to round centimeter results.
Multiply inches by 2.54 to convert inches to centimeters.
Review the exact factors, rounding method, and authoritative sources.
in
Decimals and fractions work, for example 1.5, 1/2, or 1 1/2.
cm
Fractions
10 in = 25.4 cm
10 in × 2.54 = 25.4 cm
Decimal inches10 in
Feet + inches0 ft 10 in
Nearest 1/16 inch10"
Use the exact inch-to-centimeter formula
To convert inches to centimeters, multiply the inch value by 2.54. The factor is exact, so the only rounding happens when you choose how many decimals to display.
Example calculation
For 10 inches, calculate 10 × 2.54 = 25.4 cm. For product dimensions, repeat the same calculation for length, width, and height.
Related measurement tools
Frequently asked questions
What is the formula for inches to cm?
Multiply inches by 2.54.
Is 1 inch exactly 2.54 cm?
Yes. The inch is defined as exactly 2.54 centimeters.