📏 Cm to Inches Converter
Convert centimeters to inches instantly, both directions.
About this tool
Converts centimeters to inches using the precise inverse of the international inch definition (1 inch = 2.54 cm exactly).
Useful for reading metric measurements — furniture dimensions, screen sizes, height figures — in inches instead.
Worked example
A 180 cm height is about 70.9 inches (roughly 5'11"), and a 15 cm phone screen diagonal is about 5.9 inches.
How to use it
- Enter a value in centimeters.
- The inch equivalent appears instantly.
- Swap direction to convert inches back to centimeters.
Tips
- Quick mental estimate: divide centimeters by 2.5 for a close approximation.
- For converting a full body height, the Height Converter gives you a feet + inches result instead of raw decimal inches.
- This conversion is exact and linear — there's no rounding drift no matter how large the number.
FAQ
How many inches is 100 cm?
100 cm is about 39.37 inches.
Is 2.54 cm always exactly 1 inch?
Yes, by international agreement since 1959, the inch is defined as exactly 2.54 cm — not an approximation.
What's the difference between this and the Height Converter?
This page handles any centimeter value generically; the Height Converter is tuned specifically for full body height and shows the result as feet-and-inches, not decimal inches.
From the blog: getting the most out of this tool
This is the reverse of our inches-to-cm page — we chose to split them rather than combine them under one dropdown because the two searches ("cm to inches" vs "inches to cm") come from different starting points and different intents.
Both pages, plus the general Length Converter, all share the same 2.54 constant, so results are always consistent no matter which one you land on.