Inches to Centimeters Conversion Calculator

Enter the length in inches below to get the value converted to centimeters.

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1 in = 2.54 cm
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How to Convert Inches to Centimeters

conversion scale showing inches and equivalent centimeters length values

To convert an inch measurement to a centimeter measurement, multiply the length by the conversion ratio. One inch is equal to 2.54 centimeters, so use this simple formula to convert:

centimeters = inches × 2.54

The length in centimeters is equal to the inches multiplied by 2.54.

For example, here's how to convert 5 inches to centimeters using the formula above.
5" = (5 × 2.54) = 12.7 cm
infographic showing how to convert inches to centimeters

Our inch fraction calculator can add inches and centimeters together and it also automatically converts the results to US customary, imperial and SI metric values.

Inches and centimeters are both units used to measure length. Keep reading to learn more about each unit of measure.

Inches

An inch is a unit of linear length measure equal to 1/12 of a foot or 1/36 of a yard. Because the international yard is legally defined to be equal to exactly 0.9144 meters, one inch is equal to 2.54 centimeters.[1]

The inch is a US customary and imperial unit of length. Inches can be abbreviated as in, for example 1 inch can be written as 1 in.

Inches can also be denoted using the symbol, otherwise know as a double-prime. Often a double-quote (") is used instead of a double-prime for convenience. Using the double-prime, 1 in can be written as 1″.

A quarter is .955" in diameter, which is just smaller than 1"

The standard ruler has 12", and are a common measuring tool for measuring inches. They are also often measured using tape measures which commonly come in lengths from 6' - 35'. Other types of measuring devices include scales, calipers, measuring wheels, micrometers, yardsticks, and even lasers.

Centimeters

One centimeter is equal to one-hundredth (1/100) of a meter, which is defined as the distance light travels in a vacuum in a 1/299,792,458 second time interval.

The centimeter, or centimetre, is a multiple of the meter, which is the SI base unit for length. In the metric system, "centi" is the prefix for 10-2. Centimeters can be abbreviated as cm, for example 1 centimeter can be written as 1 cm.

Metric rulers typically have 30 cm, which are represented by 30 large tick marks. To get a rough idea of the actual length of a centimeter, a standard pencil is just about 1cm thick.

We recommend using a ruler or tape measure for measuring length, which can be found at a local retailer or home center. Rulers are available in imperial, metric, or combination with both values, so make sure you get the correct type for your needs.

If you need a ruler you can also download and print our free printable rulers, which include both imperial and metric measurements.

Inch to Centimeter Conversion Table

Inch measurements converted to centimeters
Inches Centimeters
1" 2.54 cm
2" 5.08 cm
3" 7.62 cm
4" 10.16 cm
5" 12.7 cm
6" 15.24 cm
7" 17.78 cm
8" 20.32 cm
9" 22.86 cm
10" 25.4 cm
11" 27.94 cm
12" 30.48 cm
13" 33.02 cm
14" 35.56 cm
15" 38.1 cm
16" 40.64 cm
17" 43.18 cm
18" 45.72 cm
19" 48.26 cm
20" 50.8 cm
21" 53.34 cm
22" 55.88 cm
23" 58.42 cm
24" 60.96 cm
25" 63.5 cm
26" 66.04 cm
27" 68.58 cm
28" 71.12 cm
29" 73.66 cm
30" 76.2 cm
31" 78.74 cm
32" 81.28 cm
33" 83.82 cm
34" 86.36 cm
35" 88.9 cm
36" 91.44 cm
37" 93.98 cm
38" 96.52 cm
39" 99.06 cm
40" 101.6 cm

References

  1. National Institute of Standards and Technology, Handbook 133 - 2019 Edition, https://www.nist.gov/sites/default/files/documents/2017/04/28/12-apde-gentab-11-hb133-final.pdf