= Mathmatives

Inches to Centimeters Converter (inch to cm)

Enter a value in inches to see it in centimeters instantly, or type in the centimeters box to convert the other way. 1 inch = 2.54 centimeters, and 1 centimeter = 0.39370079 inches.

Multiply inches by 2.54. A 15.6-inch laptop screen is 39.6 cm across the diagonal, and a 32-inch waist is 81.3 cm.

1 inch = 2.54 centimeters. Formula: cm = in × 2.54 (or in ÷ 0.39370079)

1 inch in all length units
Millimeters (mm)25.4
Centimeters (cm)2.54
Meters (m)0.0254
Kilometers (km)0.0000254
Feet (ft)0.083333333
Yards (yd)0.027777778
Miles (mi)0.0000157828
Nautical miles (nmi)0.0000137149
Gaj (gaj)0.027777778

How to convert inches to centimeters

cm = in × 2.54

Multiply the number of inches by 2.54. To convert centimeters back to inches, multiply by 0.39370079, or divide by 2.54.

Example: 5 inches × 2.54 = 12.7 centimeters.

Inches to Centimeters conversion table

InchesCentimeters
1 in2.54 cm
2 in5.08 cm
3 in7.62 cm
4 in10.16 cm
5 in12.7 cm
6 in15.24 cm
7 in17.78 cm
8 in20.32 cm
9 in22.86 cm
10 in25.4 cm
12 in30.48 cm
15 in38.1 cm
20 in50.8 cm
25 in63.5 cm
30 in76.2 cm
40 in101.6 cm
50 in127 cm
60 in152.4 cm
70 in177.8 cm
75 in190.5 cm
80 in203.2 cm
90 in228.6 cm
100 in254 cm
200 in508 cm
250 in635 cm
500 in1,270 cm
1,000 in2,540 cm
CentimetersInches
1 cm0.39370079 in
2 cm0.78740157 in
3 cm1.1811024 in
4 cm1.5748031 in
5 cm1.9685039 in
6 cm2.3622047 in
7 cm2.7559055 in
8 cm3.1496063 in
9 cm3.5433071 in
10 cm3.9370079 in
12 cm4.7244094 in
15 cm5.9055118 in
20 cm7.8740157 in
25 cm9.8425197 in
30 cm11.811024 in
40 cm15.748031 in
50 cm19.685039 in
60 cm23.622047 in
70 cm27.559055 in
75 cm29.527559 in
80 cm31.496063 in
90 cm35.433071 in
100 cm39.370079 in
200 cm78.740157 in
250 cm98.425197 in
500 cm196.85039 in
1,000 cm393.70079 in

About the inch and the centimeter

The inch is exactly 25.4 mm. It survives in screen sizes, tyre and wheel sizes, pipe diameters and paper sizes even in metric countries.

The centimeter (centimetre) is one hundredth of a meter. Body height, clothing measurements, furniture and school rulers are all usually given in centimeters outside the US.

Frequently asked questions

How many centimeters are in a inch?

There are 2.54 centimeters in 1 inch. For any number of inches, multiply by 2.54.

How many inches are in a centimeter?

1 centimeter = 0.39370079 inches. To convert centimeters to inches, multiply by 0.39370079 or divide by 2.54.

What is 5 inches in centimeters?

5 inches = 12.7 centimeters (5 × 2.54).

Is the inch to cm conversion exact?

Yes. The 1959 international yard and pound agreement defined the yard as exactly 0.9144 meters, which makes the inch exactly 25.4 mm, the foot exactly 0.3048 m and the mile exactly 1,609.344 m. Every factor on this page follows from those definitions, so it is exact rather than approximate. Results are rounded to eight significant digits for display.

Related calculators

Last updated . Formulas are shown on the page and checked against the worked example.

Conversion factors are exact international definitions where one exists and standard reference values elsewhere. Results are rounded to 8 significant digits.