cm to inches: Convert Centimeters to Inches
·3 min read
To convert centimeters to inches, divide by 2.54 (since 1 inch = 2.54 cm exactly). So 30 cm = 30 ÷ 2.54 = 11.81 inches. To go back, multiply inches by 2.54. Here's the formula, a reference table, and a free length converter.
The conversion
1 inch = 2.54 cm, so cm ÷ 2.54 = inches and inches × 2.54 = cm. The Length Converter also covers feet, meters, miles, and kilometers.
Common conversions
- 1 cm = 0.39 in
- 10 cm = 3.94 in
- 30 cm = 11.81 in
- 100 cm = 39.37 in
- 2.54 cm = 1 in exactly
Handy real-world references
A US letter page is 8.5 in (21.6 cm) wide; A4 is 21 cm (8.27 in). A credit card is about 8.5 cm (3.37 in) long. These make quick sanity checks easy without measuring.
Bottom line
Centimeters ÷ 2.54 = inches. For feet, meters, and miles, use the Length Converter, or see everyday unit conversions for the rest.