Change inches to centimeters as you type. Type a fraction such as 5 5/8, or use the Feet + Inches tab for heights like 5'5". Also shows millimeters and meters, with a chart from 1 to 100 inches and heights from 4'10" to 6'4" in cm.
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Convert Inches to Centimeters
15 in = 38.1 cm
15 inches in other forms
Working: × 2.5415 × 2.54 = 38.1 cm
In millimeters381 mm
In meters0.381 m
1 inch is exactly 2.54 centimeters. A length cannot be negative. You can also type in the Centimeters box to go the other way.
Quick Conversions
Inches to CM Formula
cm = in × 2.54
Multiply the inches by 2.54
Example: 15 in × 2.54 = 38.1 cm
Fraction: 5 5/8 in = 5.625 × 2.54 = 14.2875 cm
Feet and inches: 5'5" = 65 in × 2.54 = 165.1 cm
1 inch is exactly 2.54 cm, by definition
How Many cm in an Inch?
The numbers everyone looks up, and a few more that follow from them.
Value
1 inch
2.54 cm
1 inch
25.4 mm
1 cm
0.393701 in
1 foot
30.48 cm
1 yard
91.44 cm
These are exact, except 1 cm in inches, which goes on for ever and is rounded to 6 decimals.
Inches to CM Chart
From 1 to 100 inches, in centimeters and millimeters. Click a row to convert it.
Inches
Centimeters
Millimeters
2.54 cm
25.4 mm
5.08 cm
50.8 mm
7.62 cm
76.2 mm
10.16 cm
101.6 mm
12.7 cm
127 mm
15.24 cm
152.4 mm
17.78 cm
177.8 mm
20.32 cm
203.2 mm
22.86 cm
228.6 mm
25.4 cm
254 mm
27.94 cm
279.4 mm
30.48 cm
304.8 mm
35.56 cm
355.6 mm
38.1 cm
381 mm
40.64 cm
406.4 mm
43.18 cm
431.8 mm
45.72 cm
457.2 mm
50.8 cm
508 mm
53.34 cm
533.4 mm
60.96 cm
609.6 mm
76.2 cm
762 mm
81.28 cm
812.8 mm
91.44 cm
914.4 mm
101.6 cm
1,016 mm
121.92 cm
1,219.2 mm
127 cm
1,270 mm
152.4 cm
1,524 mm
177.8 cm
1,778 mm
254 cm
2,540 mm
Use Print to print this page with the chart.
Most Searched Inch Values
The inch values people look up most. Click one to use it.
Inches
Centimeters
38.1 cm
25.4 cm
53.34 cm
15.24 cm
19.05 cm
177.8 cm
7.62 cm
20.32 cm
30.48 cm
27.94 cm
76.2 cm
43.18 cm
15, 10, 21, 6 and 7.5 inches are among the most searched. 15in and 15 inches give the same answer.
Height in Feet and Inches to CM
Heights from 4'10" to 6'4", in total inches and centimeters. Click a row to convert it.
Height
Inches
Centimeters
58 in
147.32 cm
59 in
149.86 cm
60 in
152.4 cm
61 in
154.94 cm
62 in
157.48 cm
63 in
160.02 cm
64 in
162.56 cm
65 in
165.1 cm
66 in
167.64 cm
67 in
170.18 cm
68 in
172.72 cm
69 in
175.26 cm
70 in
177.8 cm
71 in
180.34 cm
72 in
182.88 cm
73 in
185.42 cm
74 in
187.96 cm
75 in
190.5 cm
76 in
193.04 cm
Rounded to 4 decimals of a centimeter.
Inch Fractions in CM and MM
For rulers, tools, screws and sewing: common fractions of an inch in decimals, centimeters and millimeters. Click one to use it.
Fraction
Decimal
Centimeters
Millimeters
0.015625
0.03969 cm
0.3969 mm
0.03125
0.07938 cm
0.7938 mm
0.0625
0.15875 cm
1.5875 mm
0.125
0.3175 cm
3.175 mm
0.1875
0.47625 cm
4.7625 mm
0.25
0.635 cm
6.35 mm
0.375
0.9525 cm
9.525 mm
0.5
1.27 cm
12.7 mm
0.625
1.5875 cm
15.875 mm
0.75
1.905 cm
19.05 mm
0.875
2.2225 cm
22.225 mm
1
2.54 cm
25.4 mm
1/16 inch is 0.15875 cm, which is about 1.6 mm.
Inches vs Centimeters
The two units side by side.
Inch
Centimeter
System
Imperial and US
Metric
Symbol
in
cm
One is
2.54 cm
0.3937 in
Smaller parts
Fractions, such as 1/16
Millimeters (10 in a cm)
The US uses inches, usually as fractions, for rulers and tools. Most of the world measures in centimeters.
Other Length Conversions
📏Length Converter, 14 units from nanometers to nautical miles, with feet and inches.
↔️CM to Inches, the same page the other way, with fractions of an inch.
↔️Inches to Feet, inches in feet, as decimal feet and as feet and inches.
About Inches to CM Conversion
Type inches, a fraction or feet and inches, and the centimeters appear as you type, with millimeters and meters too. Use it for height, screens, clothes, furniture and tools. Your numbers never leave your browser.
Use this free inches to cm converter to change inches to centimeters. Type a length in the Inches box and the centimeters appear as you type. You can type a decimal such as 7.5 or a fraction such as 5/16 or 5 5/8, and the Feet + Inches tab changes a height such as 5 feet 5 inches into centimeters. The answer also shows millimeters and meters, and you can type in the Centimeters box to go the other way. Pick how many decimals to round to and copy a link to your conversion. Tables list a chart from 1 to 100 inches, the lengths people look up most, heights from 4'10" to 6'4" in centimeters, and common fractions of an inch in centimeters and millimeters. It is free and instant, and your numbers stay in your browser.
How to convert inches to cm
Multiply the inches by 2.54. That is the whole rule, because one inch is exactly 2.54 centimeters.
centimeters = inches × 2.54
For 15 inches: 15 × 2.54 = 38.1 cm. For 10 inches: 10 × 2.54 = 25.4 cm. For 6 inches: 6 × 2.54 = 15.24 cm. To go back, divide by 2.54: inches = cm ÷ 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. It is also exactly 25.4 millimeters. A foot is 12 inches, which is 30.48 cm, and a yard is 36 inches, which is 91.44 cm.
Inch fractions to cm
Rulers, tape measures, screws and tools use fractions of an inch. Type the fraction in the Inches box, such as 5/16 or 5 5/8, and the converter gives the centimeters. For 5 5/8 inches: 5 5/8 is 5.625, and 5.625 × 2.54 = 14.2875 cm. For 1/4 inch: 0.25 × 2.54 = 0.635 cm, which is 6.35 mm. The table above lists common fractions from 1/64 to 1 inch in centimeters and millimeters.
Feet and inches to cm
For a person's height, use the Feet + Inches tab. Change the feet to inches (multiply by 12), add the inches, then multiply by 2.54. For 5 feet 5 inches: 5 × 12 + 5 = 65 inches, and 65 × 2.54 = 165.1 cm. For 5 feet 9 inches: 69 inches × 2.54 = 175.26 cm. The height table above lists every height from 4'10" to 6'4".
Common conversions
1 inch is 2.54 cm, 3 inches is 7.62 cm, 6 inches is 15.24 cm, 10 inches is 25.4 cm, 12 inches is 30.48 cm, 15 inches is 38.1 cm, 21 inches is 53.34 cm and 100 inches is 254 cm. The chart above lists more, from 1 to 100 inches.
CM to inches
To go the other way, divide by 2.54: 20 cm is 7.874 inches. You can do it here by typing in the Centimeters box, or use the CM to Inches converter, which also shows the nearest fraction of an inch. For feet and inches, use the Inches to Feet converter. For other units, such as millimeters, meters, miles and kilometers, use the Length Converter.
Spelling
You may see centimeters or centimetres, and inch or inches. The units are written in and cm. This page works for all of them, and for "15in" typed without a space.
Multiply the inches by 2.54. For example, 15 inches × 2.54 = 38.1 cm.
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.
What is the formula for inches to cm?
centimeters = inches × 2.54. To go the other way, inches = centimeters ÷ 2.54.
How many cm is 15 inches?
38.1 cm. The sum is 15 × 2.54 = 38.1.
How many cm is 10 inches?
25.4 cm. The sum is 10 × 2.54 = 25.4.
How many cm is 6 inches?
15.24 cm. The sum is 6 × 2.54 = 15.24.
How many cm is 21 inches?
53.34 cm. The sum is 21 × 2.54 = 53.34.
How many cm is 7.5 inches?
19.05 cm. The sum is 7.5 × 2.54 = 19.05.
How do I convert 5 5/8 inches to cm?
Turn the fraction into a decimal first: 5 5/8 is 5.625. Then multiply by 2.54: 5.625 × 2.54 = 14.2875 cm. You can type 5 5/8 straight into the Inches box.
How many mm is 1/4 inch?
6.35 mm. 1/4 inch is 0.25 inch, and 0.25 × 2.54 = 0.635 cm, which is 6.35 mm (multiply by 25.4 to go from inches to millimeters).
How do I convert feet and inches to cm?
Change the feet to inches (multiply by 12), add the inches, then multiply by 2.54. For 5 feet 5 inches: 5 × 12 + 5 = 65 inches, and 65 × 2.54 = 165.1 cm. The Feet + Inches tab does it for you.
How many cm is 5'5"?
165.1 cm. 5 feet 5 inches is 65 inches, and 65 × 2.54 = 165.1 cm.
How many cm is 5'9"?
175.26 cm. 5 feet 9 inches is 69 inches, and 69 × 2.54 = 175.26 cm.
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 cm to inches here?
Yes. Type the length in the Centimeters box and the Inches box shows the answer, as a decimal. For 20 cm the sum is 20 ÷ 2.54 = 7.874 inches. The CM to Inches page also shows the nearest fraction of an inch.
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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