Inches to Centimeters Converter
Convert inches to centimeters — 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 Inches to Centimeters 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 inches to centimeters formula
One inch is exactly 2.54 centimeters, so multiply inches by 2.54: cm = in × 2.54. For example, 12 in × 2.54 = 30.48 cm. To convert a height in feet and inches, turn it fully into inches first (5 ft 10 in = 70 in) and then multiply.
Screen sizes, paper and height
A 6-inch phone screen is 15.24 cm, 12 in (one foot) is 30.48 cm, and a 5 ft 10 in person is 70 in = 177.8 cm. US Letter paper (8.5 × 11 in) measures 21.59 × 27.94 cm.
Frequently asked questions
How do I convert inches to centimeters?
Type the number of inches in the first box and read the result in centimeters — it updates as you type. To go the other way, type in the centimeters 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.