Inches to Centimeters Converter

The formula

1 inch equals exactly 2.54 centimeters — this is a defined international standard, not a rounded approximation, so the conversion is exact at any scale. The calculator multiplies your input by 2.54.

Worked example

US letter paper is 8.5 inches wide. Enter 8.5 and the tool returns 8.5 × 2.54 = 21.59 centimeters, which is why A4 paper (21.0 cm wide) and US letter don't line up in printers designed for one or the other.

Other reference sizes

A 1-inch binder ring converts to 2.54 cm. A 24-inch monitor's diagonal converts to 60.96 cm. A 6-foot (72-inch) height converts to 182.88 cm — useful context if you're more used to thinking in centimeters for height than feet and inches.

Precision

Results display to two decimal places, which covers typical measuring, shopping, and DIY needs. For technical drawings or machining where hundredths of a millimeter matter, keep the full 2.54 factor rather than rounding intermediate results.