Square centimeters to square inches
square inches = square centimeters × 0.15500031
Reverse: square inches to square centimeters
How to convert square centimeters to square inches
One square centimeter is 0.15500031 square inches, so multiply the number of square centimeters by 0.15500031. For example, 20 square centimeters is 20 × 0.15500031 = 3.100006 square inches. To go back, divide by the same number, or multiply by 6.4516.
Quick estimate
Multiplying by about 0.2 gets within 29.0% of the exact answer, which is enough to check that a result makes sense.
Where it comes up
Area conversions come up when buying flooring, paint or turf, comparing house and flat sizes, and measuring land and gardens.
| square centimeters | square inches |
|---|---|
| 1 cm2 | 0.15500031 in2 |
| 2 cm2 | 0.31000062 in2 |
| 3 cm2 | 0.46500093 in2 |
| 4 cm2 | 0.62000124 in2 |
| 5 cm2 | 0.77500155 in2 |
| 6 cm2 | 0.93000186 in2 |
| 7 cm2 | 1.085002 in2 |
| 8 cm2 | 1.240002 in2 |
| 9 cm2 | 1.395003 in2 |
| 10 cm2 | 1.550003 in2 |
| 11 cm2 | 1.705003 in2 |
| 12 cm2 | 1.860004 in2 |
| 13 cm2 | 2.015004 in2 |
| 14 cm2 | 2.170004 in2 |
| 15 cm2 | 2.325005 in2 |
| 16 cm2 | 2.480005 in2 |
| 17 cm2 | 2.635005 in2 |
| 18 cm2 | 2.790006 in2 |
| 19 cm2 | 2.945006 in2 |
| 20 cm2 | 3.100006 in2 |
| 25 cm2 | 3.875008 in2 |
| 30 cm2 | 4.650009 in2 |
| 40 cm2 | 6.200012 in2 |
| 50 cm2 | 7.750016 in2 |
| 60 cm2 | 9.300019 in2 |
| 70 cm2 | 10.850022 in2 |
| 75 cm2 | 11.625023 in2 |
| 80 cm2 | 12.400025 in2 |
| 90 cm2 | 13.950028 in2 |
| 100 cm2 | 15.500031 in2 |
| 120 cm2 | 18.600037 in2 |
| 150 cm2 | 23.250047 in2 |
| 200 cm2 | 31.000062 in2 |
| 250 cm2 | 38.750078 in2 |
| 300 cm2 | 46.500093 in2 |
| 400 cm2 | 62.000124 in2 |
| 500 cm2 | 77.500155 in2 |
| 750 cm2 | 116.250233 in2 |
| 1,000 cm2 | 155.00031 in2 |
| 1,500 cm2 | 232.500465 in2 |
| 2,000 cm2 | 310.00062 in2 |
| 5,000 cm2 | 775.00155 in2 |
| 10,000 cm2 | 1,550 in2 |
Questions
How many square inches are in a square centimeter?
0.15500031 square inches.
How do I convert square centimeters to square inches in a spreadsheet?
Put the value in A1 and type =A1*0.15500031, then fill the formula down the column.
Are the values in the table exact?
They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.