Cm to Inches
Type any measurement in centimeters to instantly get inches, or enter inches to get cm back. Bidirectional, free, and precise. Includes a full reference table.
How It Works
The centimeter-to-inch conversion uses the exact internationally defined ratio: 1 inch = 2.54 cm (or 1 cm = 0.3937 inches). Enter any value in centimeters and the inch equivalent appears instantly — and vice versa. No approximations are used; results are accurate to 4 decimal places.
Cm to Inches Reference Table
Quick lookup for common measurements — clothing, screen sizes, and room dimensions.
Where Cm to Inches Conversions Come Up
Accuracy & Limitations
This converter is mathematically exact — 1 inch is defined as exactly 2.54 cm. Results are displayed to 4 decimal places which covers all everyday and professional use cases. For very precise engineering tolerances (micrometer level), refer to your instrument specifications directly. Explore other length tools: Inches to Cm, Feet to Meters, and Km to Miles.
Common Questions
5 cm = 1.9685 inches. Use the formula: inches = cm × 0.3937. Our tool shows this instantly as you type.
5'7" = 170.18 cm. First convert feet to inches (5 × 12 = 60), add 7 = 67 inches, then multiply by 2.54 to get cm.
30 cm = 11.81 inches. This is roughly the size of an A4 page width or a standard ruler.
Exactly 2.54 cm = 1 inch. This is the internationally defined conversion since 1959 and applies globally.
Yes. Type in either the cm or inches field and the other updates instantly. No mode switching or page reload needed.
170 cm = 66.93 inches, which is approximately 5 feet 7 inches. This is one of the most searched height conversions.
No. All calculations happen in your browser in real time. We do not collect or store any measurement data.