Square Centimeter to Square Inch Converter

Area Converter

20 units available

Decimals:

From

To

0.155

1 cm² = 0.155 in²

Formula:

in² = cm² × 0.15500031

With your value: 1 cm² = 0.15500031 in²

How big is that?

Everyday references on a logarithmic scale, all expressed in square centimeter so you can sanity-check the result.

Your value1.00 cm²

Postage stamp (6.0× your value)6.00 cm²

A4 sheet (6.3e+2× your value)625 cm²

Parking space (1.3e+5× your value)1.25e+5 cm²

Tennis court (2.6e+6× your value)2.61e+6 cm²

Football pitch (7.1e+7× your value)7.14e+7 cm²

Other Square Centimeter to Square Inch conversions

2 cm² to in² 3 cm² to in² 4 cm² to in² 5 cm² to in² 6 cm² to in² 7 cm² to in² 8 cm² to in²

Square Centimeter to Square Inch Conversion Table

Square Centimeter (cm²)	Square Inch (in²)
0.5	0.0775
1	0.155
2	0.310001
5	0.775002
10	1.550003
15	2.325005
20	3.100006
25	3.875008
50	7.750016
100	15.500031
250	38.750078
500	77.500155
1000	155.00031

Square Inch to Square Centimeter Conversion Table

Square Inch (in²)	Square Centimeter (cm²)
0.5	3.2258
1	6.4516
2	12.9032
5	32.258
10	64.516
15	96.774
20	129.032
25	161.29
50	322.58
100	645.16
250	1,612.9
500	3,225.8
1000	6,451.6

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Square Centimeter (cm²)

Area

Exact conversion

Derived from the square metre via the length definitions above.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Square Inch (in²)

Area

Exact conversion

Derived from the square metre via the length definitions above.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Square Centimeter to Square Inch

To convert from Square Centimeter (cm²) to Square Inch (in²), multiply the value by 0.15500031.

Formula: in² = cm² × 0.15500031

Reverse: cm² = in² × 6.4516

Step-by-Step Example

Start with your value in Square Centimeter. For example: 5 cm²
Multiply by the conversion factor: 5 x 0.15500031
The result is: 0.775002 in²

About Square Centimeter

The square centimeter (cm²) is a unit of area. One square centimeter equals 0.0001 square metres. UnitConvertLab converts it against every other area unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: area calculations, engineering and science, education.

About Square Inch

The square inch (in²) is a unit of area. One square inch equals 0.00064516 square metres. UnitConvertLab converts it against every other area unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: area calculations, engineering and science, education.

Frequently Asked Questions

How many Square Inch are in 1 Square Centimeter?

There are exactly 0.15500031 Square Inch in 1 Square Centimeter. This means the conversion factor from Square Centimeter to Square Inch is 0.15500031.

What is the formula to convert Square Centimeter to Square Inch?

The formula to convert Square Centimeter to Square Inch is: in² = cm² × 0.15500031. For example, to convert 10 Square Centimeter to Square Inch, you would multiply 10 by 0.15500031.

What is a Square Centimeter?