CM to Inches Converter
Convert centimeters to inches
Frequently Asked Questions
How do I convert cm to inches?
Divide centimeters by 2.54. 10 cm = 3.937 inches. 1 inch = 2.54 cm exactly. The converter handles both directions and shows fractional inches (e.g., 3 15/16") for practical measurements.
What are common cm to inch conversions?
1 cm = 0.394". 5 cm = 1.97". 10 cm = 3.94". 15 cm = 5.91". 20 cm = 7.87". 30 cm = 11.81". 50 cm = 19.69". 100 cm = 39.37". These cover most everyday measurement needs.
How do I convert screen sizes between cm and inches?
TV and monitor sizes are measured diagonally in inches. A 55-inch TV = 139.7 cm diagonal. A 27-inch monitor = 68.58 cm. The converter also calculates screen dimensions from diagonal size and aspect ratio.
How do I read a ruler with both cm and inches?
Centimeter rulers have 10 small divisions per cm (millimeters). Inch rulers have 16 divisions per inch (1/16"). The converter translates between these scales. 1 cm ≈ 3/8 inch is a useful quick approximation.
Why is 2.54 cm per inch an exact value?
In 1959, the international yard was defined as exactly 0.9144 meters, making 1 inch = 25.4 mm exactly. This is a defined relationship, not a measured approximation. All inch-to-metric conversions derive from this definition.