Centimeters to Inches Converter
Convert centimeters to inches — and back — in an instant. Type a value in either box and the answer updates live. It’s accurate, free and completely private: the conversion runs entirely on your device.
- 🔒 100% private — no uploads
- 🆓 Free, no watermark
- 📱 Works on any device
How to convert
- 1
Choose your units
The tool opens on the most common pairing. Change either unit from its dropdown, or hit the swap button to flip the direction.
- 2
Type a value
Enter a number in either box. The other side updates instantly as you type — convert either way without pressing a button.
- 3
Copy or compare
Copy the result to your clipboard, or scan the common-values table below for quick at-a-glance conversions.
Why use Centimeters to Inches Converter?
100% private
Every conversion is computed locally in your browser. Nothing you enter ever leaves your device.
Instant & two-way
Results update live as you type, in either direction — no “convert” button and no page reloads.
Accurate
Conversions use exact, standards-based factors, so you get the same answer a trusted reference would.
Works on any device
No install and no account — it runs in any modern browser on desktop, tablet or phone.
The centimeters to inches formula
One inch is defined as exactly 2.54 centimeters, so divide centimeters by 2.54: in = cm ÷ 2.54. For example, 30 cm ÷ 2.54 = 11.81 in. Because the relationship is exact by definition, the only rounding is in how many decimals you keep.
Common centimeter measurements in inches
10 cm is 3.94 in, 30 cm is just under a foot (11.81 in), and 100 cm (one metre) is 39.37 in. A sheet of A4 paper is 21 × 29.7 cm, or 8.27 × 11.69 in, and a 170 cm person is about 5 ft 7 in.
Frequently asked questions
How do I convert centimeters to inches?
Type the number of centimeters in the first box and read the result in inches — it updates as you type. To go the other way, type in the inches box instead.
Does anything get uploaded to a server?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is uploaded, stored or logged, and it keeps working offline once the page has loaded.
Is it free?
Yes — completely free, no account, no watermark and no limits.