Everyday
Percentages, tips & quick math
1 inches to cm (1 in to cm)
1 in equals 2.54 cm. This is the exact conversion for 1 inches to cm, derived from exact SI/NIST definitions with the standard conversion factor. It's also written 1 in to cm. See nearby values below, or open the full Unit Converter to convert any other value or unit.
Quick answer
1 in = 2.54 cm
- 1 in = 2.54 cm
- Exact definitional conversion factor
Frequently asked questions
What is 1 inches in cm?
1 in is 2.54 cm. The conversion uses the exact factor 1 in = 2.54 cm.
How do I convert inches to cm?
Multiply by the exact factor (1 in = 2.54 cm). Open the full Unit Converter to convert any value.
Is 1 in to cm the same as 1 inches to cm?
Yes — 1 in to cm and 1 inches to cm are the same conversion: 1 in = 2.54 cm.