Inches to Centimeters Converter

Use this converter to easily convert between Inches and Centimeters (in to cm).

Share converter:

Put it on your site!
get code

How many Centimeters in one Inch?

According to the International System of Units there are exactly 2.54 centimeters in one inch. Both the centimeter and the inch are used to measure length, but while the former is used in most countries in the world, the inch is used in a couple of countries that still follow the imperial system of measurements, which also includes the foot, yard, mile, etc. Both units are of comparable magnitude, so they are used to measure similarly-sized objects or where similar precision is required. The symbol of centimeters is "cm", while for inch it is "in", or sometimes double quotes, e.g. 10" means 10 inches.

Difference between Inches and Centimeters

The inch is an old unit, used for the first time sometime in the 7 century in Europe, while officially defined in 1324. Different standards were used in different places, but nowadays it is defined in terms of meters and centimeters. Currently inches are mostly used in the US, the UK, Canada, and Japan. Since these countries originated a lot of technological innovations, the inch finds application in electronics – display screen sizes are predominantly expressed in inches.

The centimeter is derived from the base measurement unit established by the International Organization for Standardization – the meter. Its prefix 'centi' indicates that it is 1/100 of a meter. Therefore, the cm can be defined as being equal to the path length that light travels in vacuum in 1/29,979,245,800 of a second. A centimeter is equal to precisely 0.3937 of an inch, or 3887/9873 as a fraction. Centimeters are used when relatively good precision is required: in construction, engineering, architecture, and for certain scientific purposes.

Most rulers have both cm and in, featured on opposite sides.

How to convert Inches to Centimeters?

Converting inches to centimeters is easy, as all you need to do is multiply by 2.54, or use our in to cm converter above. See the examples and the conversion table below for some common in to cm conversions.

Inches to cm conversion example

Sample task: convert 12 inches to centimeters. Solution:

in * 2.54 = cm
12 in * 2.54 = 30.48 cm
End result:
12 in is equal to 30.48 cm

in to cm conversion table

in to cm conversion table
in cm
1 in 2.54 cm
2 in 5.08 cm
3 in 7.62 cm
4 in 10.16 cm
5 in 12.70 cm
6 in 15.24 cm
7 in 17.78 cm
8 in 20.32 cm
9 in 22.86 cm
10 in 25.40 cm
20 in 50.80 cm
30 in 76.20 cm
40 in 101.60 cm
50 in 127 cm
60 in 152.40 cm
70 in 177.80 cm
80 in 203.20 cm
90 in 228.60 cm
100 in 254 cm
200 in 508 cm
300 in 762 cm
400 in 1,016 cm
500 in 1,270 cm
600 in 1,524 cm
700 in 1,778 cm
800 in 2,032 cm
900 in 2,286 cm
1,000 in 2,540 cm


[1] NIST Special Publication 330 (2008) - "The International System of Units (SI)", edited by Barry N.Taylor and Ambler Thompson

[2] International Organization for Standardization (1993). ISO Standards Handbook: Quantities and units (3rd edition). Geneva: ISO. ISBN 92-67-10185-4.

Cite this converter & page

If you'd like to cite this online converter resource and information as provided on the page, you can use the following citation:
Georgiev G.Z., "Inches to cm Converter", [online] Available at: URL [Accessed Date: 26 May, 2018].