Change centimeters to inches as you type, as a decimal, as the nearest fraction of an inch and as feet and inches, with a chart from 1 to 100 cm and the values people look up most. Type in the Inches box to go the other way.
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Convert Centimeters to Inches
20 cm = 7.874 in
20 cm in other forms
Working: ÷ 2.5420 ÷ 2.54 = 7.874 in
Nearest fraction (1/16)7 7/8 in
Feet and inches7.87 in
1 inch is exactly 2.54 centimeters. A length cannot be negative. In the Inches box you can also type a fraction, such as 5/16 or 1 1/2.
Quick Conversions
CM to Inches Formula
in = cm ÷ 2.54
Divide the centimeters by 2.54 (or multiply by 0.393701)
Example: 20 cm ÷ 2.54 = 7.874 in
1 inch is exactly 2.54 cm, by definition
For a fraction, round to the nearest 1/16: 7.874 in is about 7 7/8 in
How Many cm in an Inch?
The two numbers everyone looks up, and a few more that follow from them.
Value
1 inch
2.54 cm
1 cm
0.393701 in
1 inch
25.4 mm
1 foot
30.48 cm
1 meter
39.3701 in
These are exact, except 1 cm in inches, which goes on for ever and is rounded to 6 decimals.
CM to Inches Chart
From 1 to 100 cm: decimal inches and the nearest 1/16. Click a row to convert it.
Centimeters
Inches
Nearest 1/16
0.3937 in
3/8 in
0.7874 in
13/16 in
1.1811 in
1 3/16 in
1.5748 in
1 9/16 in
1.9685 in
1 15/16 in
2.3622 in
2 3/8 in
2.7559 in
2 3/4 in
3.1496 in
3 1/8 in
3.5433 in
3 9/16 in
3.937 in
3 15/16 in
4.7244 in
4 3/4 in
5.5118 in
5 1/2 in
5.9055 in
5 7/8 in
6.2992 in
6 5/16 in
6.6929 in
6 11/16 in
7.0866 in
7 1/16 in
7.874 in
7 7/8 in
8.2677 in
8 1/4 in
9.8425 in
9 13/16 in
11.811 in
11 13/16 in
15.748 in
15 3/4 in
19.685 in
19 11/16 in
23.622 in
23 5/8 in
27.5591 in
27 9/16 in
31.4961 in
31 1/2 in
35.4331 in
35 7/16 in
39.3701 in
39 3/8 in
Use Print to print this page with the chart.
Most Searched CM Values
The centimeter values people look up most. Click one to use it.
Centimeters
Inches
7.874 in
5.9055 in
15.748 in
3.937 in
11.811 in
19.685 in
31.4961 in
6.6929 in
7.0866 in
8.2677 in
5.5118 in
4.7244 in
20, 15, 40, 10 and 30 cm are the five most searched. 20cm and 20 cm give the same answer.
Height in Feet and Inches
Heights in centimeters, in feet and inches. Click one to use it.
Centimeters
Feet and inches
Inches
4 ft 11.06 in
59.0551 in
5 ft 1.02 in
61.0236 in
5 ft 2.99 in
62.9921 in
5 ft 4.96 in
64.9606 in
5 ft 6.93 in
66.9291 in
5 ft 8.9 in
68.8976 in
5 ft 10.87 in
70.8661 in
6 ft 0.83 in
72.8346 in
6 ft 2.8 in
74.8031 in
The inches part is rounded to 2 decimals.
Inch Fractions in Centimeters
For rulers, tools and sewing: common fractions of an inch in decimals and centimeters. Click one to use it.
Fraction
Inches
Centimeters
0.0625
0.15875 cm
0.125
0.3175 cm
0.1875
0.47625 cm
0.25
0.635 cm
0.375
0.9525 cm
0.5
1.27 cm
0.625
1.5875 cm
0.75
1.905 cm
0.875
2.2225 cm
1
2.54 cm
1/16 inch is 0.15875 cm, which is about 1.6 mm.
Centimeters vs Inches
The two units side by side.
Centimeter
Inch
System
Metric
Imperial and US
Symbol
cm
in
One is
0.3937 in
2.54 cm
Smaller parts
Millimeters (10 in a cm)
Fractions, such as 1/16
Most of the world measures in centimeters. The US uses inches, usually as fractions, for rulers and tools.
Other Length Conversions
📏Length Converter, 14 units from nanometres to nautical miles, with feet and inches.
↔️Inches to CM, the same page the other way, with feet and inches to cm.
↔️Inches to Feet, inches in feet, as decimal feet and as feet and inches.
To change inches to centimeters here, type in the Inches box.
About CM to Inches Conversion
Type centimeters and the inches appear as you type, as a decimal, as the nearest fraction and as feet and inches. Use it for height, clothes, furniture, screens and school. Your numbers never leave your browser.
Use this free cm to inches converter to change centimeters to inches. Type a length in the Centimeters box and the inches appear as you type: as a decimal, as the nearest fraction of an inch (to the nearest 1/8, 1/16, 1/32 or 1/64) and as feet and inches. You can also type in the Inches box to go the other way, and you can type a fraction such as 5/16 or 1 1/2. Pick how many decimals to round to and copy a link to your conversion. Tables list a chart from 1 to 100 cm, the lengths people look up most, heights in feet and inches, and common fractions of an inch in centimeters. It is free and instant, and your numbers stay in your browser.
How to convert cm to inches
Divide the centimeters by 2.54. Dividing by 2.54 is the same as multiplying by 0.393701.
inches = centimeters ÷ 2.54
For 20 cm: 20 ÷ 2.54 = 7.874 in. For 10 cm: 10 ÷ 2.54 = 3.937 in. For 100 cm, one meter: 100 ÷ 2.54 = 39.3701 in. To go back, multiply by 2.54: cm = inches × 2.54.
How many centimeters are in an inch
One inch is exactly 2.54 centimeters. That is a definition, agreed in 1959, so it is not rounded. One centimeter is 0.393701 inches, rounded, because dividing 1 by 2.54 never ends. A foot is 12 inches, which is 30.48 cm, and a meter is 39.3701 inches.
Inches as fractions
Rulers, tape measures and tools use fractions of an inch, not decimals. The converter shows the nearest fraction, to the nearest 1/8, 1/16, 1/32 or 1/64, which you choose under the answer. For 20 cm the exact answer is 7.874 in, and the nearest 1/16 is 7 7/8 in (7.875). It is the nearest fraction, so it can be a little above or below the exact length. You can also type a fraction such as 5/16 or 1 1/2 in the Inches box to see it in centimeters.
Feet and inches for height
For a person's height, feet and inches are more usual: 170 cm is 66.9291 inches, which is 5 ft 6.93 in, and 180 cm is 70.8661 inches, which is 5 ft 10.87 in. The table above lists heights from 150 to 190 cm.
Common conversions
10 cm is 3.937 in, 15 cm is 5.9055 in, 20 cm is 7.874 in, 30 cm is 11.811 in, 40 cm is 15.748 in, 50 cm is 19.685 in and 100 cm is 39.3701 in. The chart above lists more, from 1 to 100 cm, and the table of most searched values shows the ones people look up most.
Inches to cm
To go the other way, multiply by 2.54: 5 inches is 12.7 cm, and 1/2 inch is 1.27 cm. You can do it here by typing in the Inches box, or use the Inches to CM converter. For other units, such as millimeters, feet, meters, miles and kilometers, use the Length Converter.
Spelling
You may see centimeters or centimetres, and inch or inches. The units are written cm and in. This page works for all of them, and for "20cm" typed without a space.
Divide the centimeters by 2.54. For example, 20 cm ÷ 2.54 = 7.874 inches. You can also multiply by 0.393701.
How many centimeters are in an inch?
2.54. One inch is exactly 2.54 centimeters, by definition, so 5 inches is 12.7 cm and a foot (12 inches) is 30.48 cm.
How many inches are in a centimeter?
0.393701 inches, rounded (1 ÷ 2.54 never ends). So 10 cm is 3.937 inches and 100 cm, one meter, is 39.3701 inches.
What is the formula for cm to inches?
inches = centimeters ÷ 2.54. To go the other way, centimeters = inches × 2.54.
How many inches is 20 cm?
7.874 inches, which is 7 7/8 inches to the nearest 1/16. The sum is 20 ÷ 2.54 = 7.874.
How many inches is 15 cm?
5.9055 inches, which is 5 7/8 inches to the nearest 1/16. The sum is 15 ÷ 2.54 = 5.9055.
How many inches is 40 cm?
15.748 inches, which is 15 3/4 inches to the nearest 1/16. The sum is 40 ÷ 2.54 = 15.748.
How many inches is 10 cm?
3.937 inches, which is 3 15/16 inches to the nearest 1/16. The sum is 10 ÷ 2.54 = 3.937.
How many inches is 30 cm?
11.811 inches, which is 11 13/16 inches to the nearest 1/16. The sum is 30 ÷ 2.54 = 11.811.
How many inches is 50 cm?
19.685 inches, which is 19 11/16 inches to the nearest 1/16. The sum is 50 ÷ 2.54 = 19.685.
How do I turn cm into inches as a fraction?
Divide by 2.54, then round to the nearest 1/16 (or 1/8, 1/32, 1/64): multiply the inches by 16, round to a whole number, and divide by 16. For 20 cm: 7.874 × 16 = 125.98, which rounds to 126, and 126/16 is 7 7/8. The converter does it for you.
How do I convert cm to feet and inches?
Change to inches first (÷ 2.54), then divide by 12. The whole number is the feet, and what is left over is the inches. For 180 cm: 180 ÷ 2.54 = 70.8661 inches, which is 5 feet 10.87 inches.
How tall is 170 cm in feet and inches?
5 ft 6.93 in. The sum is 170 ÷ 2.54 = 66.9291 inches, which is 5 feet (60 inches) and 6.93 inches.
Is 1 inch exactly 2.54 cm?
Yes. Since 1959 the inch has been defined as exactly 25.4 millimeters, which is 2.54 centimeters, so the conversion is exact in this direction.
Can I convert inches to cm here?
Yes. Type the length in the Inches box, as a decimal or a fraction such as 5/16, and the Centimeters box shows the answer. For 5 inches the sum is 5 × 2.54 = 12.7 cm.
Are my numbers saved or shared?
No. The conversion happens in your browser, and the numbers you type are not stored or sent to any server. A link you copy keeps the numbers after the # sign, which browsers never send to a server.
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