Convert Square Inches to Square Centimeters

Enter the area in square inches below to get the value converted to square centimeters.

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Results in Square Centimeters:
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1 sq in = 6.4516 sq cm

How to Convert Square Inches to Square Centimeters

conversion scale showing square inches and equivalent square centimeters area values

To convert a square inch measurement to a square centimeter measurement, multiply the area by the conversion ratio. One square inch is equal to 6.4516 square centimeters, so use this simple formula to convert:

square centimeters = square inches × 6.4516

The area in square centimeters is equal to the square inches multiplied by 6.4516.

For example, here's how to convert 5 square inches to square centimeters using the formula above.
5 sq in = (5 × 6.4516) = 32.258 sq cm

Square inches and square centimeters are both units used to measure area. Keep reading to learn more about each unit of measure.

Square Inches

One square inch is equal to the area of a square with sides that are 1 inch in length.

The square inch is a US customary and imperial unit of area. A square inch is sometimes also referred to as a square in. Square inches can be abbreviated as sq in, and are also sometimes abbreviated as in². For example, 1 square inch can be written as 1 sq in or 1 in².

Square Centimeters

One square centimeter is equal to the area of a square with 1 centimeter long sides.

The square centimeter, or square centimetre, is a multiple of the square meter, which is the SI derived unit for area. In the metric system, "centi" is the prefix for 10-2. A square centimeter is sometimes also referred to as a square cm. Square centimeters can be abbreviated as sq cm, and are also sometimes abbreviated as cm². For example, 1 square centimeter can be written as 1 sq cm or 1 cm².

Square Inch Measurements and Equivalent Square Centimeter Conversions

Common square inch values converted to the equivalent square centimeter value
Square Inches Square Centimeters
1 sq in 6.4516 sq cm
2 sq in 12.9 sq cm
3 sq in 19.35 sq cm
4 sq in 25.81 sq cm
5 sq in 32.26 sq cm
6 sq in 38.71 sq cm
7 sq in 45.16 sq cm
8 sq in 51.61 sq cm
9 sq in 58.06 sq cm
10 sq in 64.52 sq cm
11 sq in 70.97 sq cm
12 sq in 77.42 sq cm
13 sq in 83.87 sq cm
14 sq in 90.32 sq cm
15 sq in 96.77 sq cm
16 sq in 103.23 sq cm
17 sq in 109.68 sq cm
18 sq in 116.13 sq cm
19 sq in 122.58 sq cm
20 sq in 129.03 sq cm
21 sq in 135.48 sq cm
22 sq in 141.94 sq cm
23 sq in 148.39 sq cm
24 sq in 154.84 sq cm
25 sq in 161.29 sq cm
26 sq in 167.74 sq cm
27 sq in 174.19 sq cm
28 sq in 180.64 sq cm
29 sq in 187.1 sq cm
30 sq in 193.55 sq cm
31 sq in 200 sq cm
32 sq in 206.45 sq cm
33 sq in 212.9 sq cm
34 sq in 219.35 sq cm
35 sq in 225.81 sq cm
36 sq in 232.26 sq cm
37 sq in 238.71 sq cm
38 sq in 245.16 sq cm
39 sq in 251.61 sq cm
40 sq in 258.06 sq cm

More Square Inch Area Conversions

US Customary
Convert to Square Miles
1 sq in is equal to 2.491E-10 square miles
Convert to Acres
1 sq in is equal to 1.5942E-7 acres
Convert to Square Yards
1 sq in is equal to 0.000772 square yards
Convert to Square Feet
1 sq in is equal to 0.006944 square feet
SI Units
Convert to Square Kilometers
1 sq in is equal to 6.4516E-10 square kilometers
Convert to Square Meters
1 sq in is equal to 0.000645 square meters
Convert to Square Millimeters
1 sq in is equal to 645.16 square millimeters
Other Metric Units
Convert to Hectares
1 sq in is equal to 6.4516E-8 hectares
Convert to Ares
1 sq in is equal to 6.4516E-6 ares