Square metric area unit.
Square Centimeters to Square inches Converter — cm2 to in2
Convert Square Centimeter (cm2) to Square inch (in2) using the exact conversion factor (1 square centimeter = 0.15500031 square inch). See the formula, worked examples, and conversion table.
Square Centimeters to Square inches converter
Converter
Area Converter
Convert land, construction, mapping, survey, and scientific area units.
Context values
Some unit families need one extra value for a physically accurate result.
A square inch is the area of a one-inch square.
Result = input x 0.0001 / 0.00064516.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Centimeters to Square inches
Comparing Square Centimeter and Square inch is common in agriculture and real estate, where US land is typically measured in acres and most of the rest of the world uses hectares. Specifically: Square metric area unit, and a square inch is the area of a one-inch square.
Formula
square inches = square centimeters × 0.155000310001
This factor comes from each unit's defined relationship to the category's base unit: 1 square centimeter equals 0.0001 base units, and 1 square inch equals 0.00064516 base units, so dividing one by the other gives the direct square centimeter-to-square inch factor of 0.155000310001.
Simple example
1 cm2 × 0.15500031 = 0.15500031 in2
1 square centimeter = 0.15500031 square inches.
Real-world example
10 cm2 × 0.15500031 = 1.5500031 in2
10 square centimeters = 1.5500031 square inches.
Conversion table
| Square Centimeter (cm2) | Square inch (in2) |
|---|---|
| 1 cm2 | 0.15500031 in2 |
| 5 cm2 | 0.77500155 in2 |
| 10 cm2 | 1.5500031 in2 |
| 25 cm2 | 3.87500775 in2 |
| 50 cm2 | 7.7500155 in2 |
| 100 cm2 | 15.500031 in2 |
Reverse conversion: Square inch to Square Centimeter
0.15500031 in2 × 6.4516 = 1 cm2
0.15500031 square inches = 1 square centimeters.
square centimeters = square inches × 6.4516
For a page dedicated to this direction, see Square inch to Square Centimeter.
Understanding the Square Centimeter (cm2)
Square metric area unit.
Understanding the Square inch (in2)
A square inch is the area of a one-inch square.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square inches are in 1 square centimeter?
1 square centimeter equals 0.15500031 square inches, using the exact defined conversion factor rather than an estimate.
How do I convert square centimeter to square inch?
Multiply the square centimeter value by 0.15500031. The converter above does this instantly to whatever precision you set.
How do I convert square inch back to square centimeter?
Use the reverse factor: 1 square inch equals 6.4516 square centimeters. You can also use the swap control in the converter above to flip the direction instantly.
What is a square centimeter?
Square Centimeter (cm2) is a unit of area.
What is a square inch?
Square inch (in2) is a unit of area.
Is the square centimeter to square inch conversion exact?
Yes. Both square centimeter and square inch are defined by fixed standards rather than physical artifacts, so the factor of 0.15500031 used above is exact to as many digits as you choose to display.