Square Centimeters to Square Inches Converter
Convert square centimeters to square inches instantly. One square centimeter equals exactly 0.1550003 square inches. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert square centimeters to square inches
Worked example: convert 12 square centimeters to square inches. Using square inches ← square centimeters × 0.15500031, we get 12 × 0.15500031 = 1.8600037 sq in. To check the result, convert back: 1.8600037 sq in ÷ 0.15500031 = 12 cm².
Square centimeters to square inches chart
| Square centimeters (cm²) | Square inches (sq in) |
|---|---|
| 1 cm² | 0.1550003 sq in |
| 2 cm² | 0.3100006 sq in |
| 3 cm² | 0.4650009 sq in |
| 4 cm² | 0.6200012 sq in |
| 5 cm² | 0.7750016 sq in |
| 6 cm² | 0.9300019 sq in |
| 8 cm² | 1.240002 sq in |
| 10 cm² | 1.550003 sq in |
| 12 cm² | 1.860004 sq in |
| 15 cm² | 2.325005 sq in |
| 20 cm² | 3.100006 sq in |
| 25 cm² | 3.875008 sq in |
| 30 cm² | 4.650009 sq in |
| 40 cm² | 6.200012 sq in |
| 50 cm² | 7.750016 sq in |
| 75 cm² | 11.62502 sq in |
| 100 cm² | 15.50003 sq in |
| 150 cm² | 23.25005 sq in |
| 200 cm² | 31.00006 sq in |
| 250 cm² | 38.75008 sq in |
| 500 cm² | 77.50016 sq in |
| 1,000 cm² | 155.0003 sq in |
Square inches to square centimeters (reverse)
| Square inches (sq in) | Square centimeters (cm²) |
|---|---|
| 1 sq in | 6.4516 cm² |
| 2 sq in | 12.9032 cm² |
| 5 sq in | 32.258 cm² |
| 10 sq in | 64.516 cm² |
| 20 sq in | 129.032 cm² |
| 50 sq in | 322.58 cm² |
| 100 sq in | 645.16 cm² |
| 250 sq in | 1,612.9 cm² |
| 500 sq in | 3,225.8 cm² |
| 1,000 sq in | 6,451.6 cm² |
About the square centimeter and the square inch
A square centimeter is a 1 cm by 1 cm square. It is used for paper and card sizes, small surfaces, skin areas in medicine and the cross section of wires.
A square inch is the area of a square with 1-inch sides. It appears in pressure units like psi (pounds per square inch), print and screen sizes, and small parts.
One square inch equals 6.4516 square centimeters, which makes the square inch the larger unit of the two.
Everyday sizes in square centimeters and square inches
| Everyday example (approximate) | In square centimeters | In square inches |
|---|---|---|
| A bedroom | 120,000 cm² | 18,600 sq in |
| A parking space | 125,000 cm² | 19,375 sq in |
| A one-bedroom apartment | 500,000 cm² | 77,500 sq in |
| A tennis court | 2,607,600 cm² | 404,180 sq in |
| A basketball court | 4,366,000 cm² | 676,730 sq in |
| A soccer pitch | 71,400,000 cm² | 11,067,000 sq in |
Square centimeters to square inches FAQ
How many square inches are in one square centimeter?
One square centimeter equals exactly 0.15500031 square inches. In the other direction, one square inch equals 6.4516 square centimeters.
How do I convert square centimeters to square inches without a calculator?
convert 12 square centimeters to square inches. Using square inches ← square centimeters × 0.15500031, we get 12 × 0.15500031 = 1.8600037 sq in. To check the result, convert back: 1.8600037 sq in ÷ 0.15500031 = 12 cm². For a quick estimate, round the factor to 0.16. Then 12 cm² is about 1.92 sq in, compared with the exact 1.86 sq in (an error of 3.2%). That is close enough for planning, but use the calculator above when the number matters.
What is a bedroom in square inches?
A bedroom is about 120,000 square centimeters, which is 18,600 square inches. Treat that as an approximate everyday figure rather than an official measurement.
Are the square centimeters and square inches the same in every country?
The square centimeter is exactly 0.0001 m². The square inch is exactly 6.4516 cm².