📏 Inches to Cm Converter
Convert inches to centimeters instantly, both directions.
About this tool
Converts inches to centimeters using the exact factor 1 inch = 2.54 cm.
Useful for screen sizes, paper dimensions, furniture measurements, and international size charts.
Worked example
A 27-inch monitor's diagonal is about 68.6 cm, and a 30 cm ruler is about 11.8 inches.
How to use it
- Enter a value in inches.
- The centimeter equivalent appears instantly.
- Swap direction to convert centimeters back to inches.
Tips
- Screen sizes are almost always advertised in inches worldwide, even in metric countries — this is one of the most common uses of this page.
- 1 inch = 2.54 cm exactly, by international agreement since 1959 — no rounding involved.
- For a full body height, the Height Converter gives a feet-and-inches breakdown instead of a single decimal figure.
FAQ
How many cm is 1 inch?
Exactly 2.54 cm.
Is this the same for a 55-inch TV?
Yes — multiply 55 by 2.54 to get the diagonal in centimeters, about 139.7 cm.
Why do clothing sizes use different systems in different countries?
That's a sizing-standard difference, not a unit conversion — inches and centimeters measure the same thing, but garment size charts use their own separate scales.
From the blog: getting the most out of this tool
Screen and paper sizes are the two searches that bring most people to this page, so the quick-reference table below is tuned around common electronics and stationery sizes rather than arbitrary round numbers.
The swap button is worth using here — going from "inches to cm" to "cm to inches" mid-task is common when comparing a US spec sheet against a metric one.