Inches to CM Converter
Converting inches to centimeters — for TV sizes, heights, or DIY measurements? Type a value above for an instant, exact result. The tool defaults to in → cm and can convert between any length units.
Inches to centimeters
All units in this category
How to convert inches to centimeters
One inch equals exactly 2.54 centimeters. To convert inches to cm, multiply the inch value by 2.54. For example, 12 inches × 2.54 = 30.48 cm — which is why a 12-inch ruler is 30.48 cm long.
Quick conversion table
Common inch-to-centimeter conversions for quick reference:
Need the reverse? Try our cm to inches converter, or browse every unit in the main unit converter.
Frequently asked questions
How many centimeters are in an inch?
Exactly 2.54 centimeters per inch, by international definition.
How do you convert inches to cm?
Multiply inches by 2.54. Example: 5 in × 2.54 = 12.7 cm.
How many cm is 12 inches?
12 inches = 30.48 cm — exactly one foot.
How many cm is 5'9"?
5 feet 9 inches = 69 inches × 2.54 = 175.26 cm.
Why is the inch exactly 2.54 cm?
The international yard and pound agreement of 1959 defined the inch as exactly 2.54 cm to standardize measurements worldwide.