Centimeters to Inches (cm to in) — Conversion Calculator

Centimeters to Inches Conversion Table

Centimeters	Inches
1 cm	0.393701 in
2 cm	0.787402 in
3 cm	1.1811 in
4 cm	1.5748 in
5 cm	1.9685 in
6 cm	2.3622 in
7 cm	2.75591 in
8 cm	3.14961 in
9 cm	3.54331 in
10 cm	3.93701 in
15 cm	5.90551 in
20 cm	7.87402 in
25 cm	9.84252 in
30 cm	11.811 in
40 cm	15.748 in
50 cm	19.685 in
75 cm	29.5276 in
100 cm	39.3701 in
250 cm	98.4252 in
500 cm	196.85 in
1000 cm	393.701 in

Formula

inches = centimeters × 0.39370079
centimeters = inches × 2.54
Example: 5 cm × 0.39370079 = 1.9685 in

About the Centimeters-to-Inches Conversion

Converting centimeters to inches comes up most often when working with fabric, screen sizes, photography sensor specifications, or product dimensions sourced from metric-system manufacturers. The factor (2.54 cm per inch) is exact — it has been defined that way internationally since 1959.

Real-World Examples

30 cm (standard ruler) = 11.811 in
170 cm (average adult height) = 66.9291 in
2.54 cm (one inch exactly) = 1 in
10 cm (small object width) = 3.93701 in

Inches to Centimeters (Reverse)

Inches	Centimeters
1 in	2.54 cm
2 in	5.08 cm
3 in	7.62 cm
4 in	10.16 cm
5 in	12.7 cm
6 in	15.24 cm
7 in	17.78 cm
8 in	20.32 cm
9 in	22.86 cm
10 in	25.4 cm
15 in	38.1 cm
20 in	50.8 cm
25 in	63.5 cm
30 in	76.2 cm
40 in	101.6 cm
50 in	127 cm
75 in	190.5 cm
100 in	254 cm
250 in	635 cm
500 in	1270 cm
1000 in	2540 cm

Frequently Asked Questions

How many inches are in a centimeter?

1 centimeter equals 0.39370079 inches.

How do I convert centimeters to inches?

Multiply the value in centimeters by 0.39370079 to get inches. For example, 5 cm × 0.39370079 = 1.9685 in.

How do I convert inches back to centimeters?

Multiply the value in inches by 2.54 to get centimeters. Equivalently, divide by 0.39370079.

How many centimeters are in a inch?

1 inch equals 2.54 centimeters.

How many inches is 30 cm?

30 cm (a standard ruler) equals 11.811 in.

Is the centimeters-to-inches conversion exact?

The underlying definitions are exact. The decimal representation 0.39370079 is rounded; six significant figures is more than sufficient for everyday use.

About Centimeters and Inches

The centimetre (symbol cm) equals one hundredth of a metre and is widely used for everyday measurements throughout most of the world.

The inch (symbol in) is an imperial and US customary unit defined as exactly 25.4 millimetres since the 1959 international agreement.

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