Inches to CM
Convert inches to centimeters instantly.
How to Do It Manually
One inch equals exactly 2.54 centimeters. Multiply your inch value by 2.54 to get centimeters.
cm = inches × 2.54
Frequently Asked Questions
How many cm is 1 inch?
Exactly 2.54 cm.
How many inches is 1 cm?
Approximately 0.3937 inches (1 ÷ 2.54).
Why is 2.54 the exact conversion?
By international agreement in 1959, one international inch was defined as exactly 2.54 centimeters.