Area / cm² → in²
Convert Square centimeters to Square inches
Convert surface areas in metric and international customary units. Convert Square centimeters (cm²) to Square inches (in²). Find the formula, worked examples, unit definitions, and practical guidance below.
Reverse: Square inches to Square centimeters →
How to convert square centimeters to square inches
Area factors are squared length factors. Acres here use international feet, not historical US survey feet.
Use x for the value in cm², b for the intermediate value in m², and y for the result in in².
in² = cm² × 0.0001 ÷ 0.00064516
Worked examples
10 cm² ≈ 1.55000310001 in²
Step 1: (10 × 0.0001) ≈ 0.001 m².
Step 2: 0.001 ÷ 0.00064516 ≈ 1.55000310001 in².20 cm² ≈ 3.10000620001 in²
Step 1: (20 × 0.0001) ≈ 0.002 m².
Step 2: 0.002 ÷ 0.00064516 ≈ 3.10000620001 in².
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Square centimeters
Square centimeters (cm²) measures area under the conventions above. The base value in m² is (x × 0.0001), where x is the numerical value in cm². Factors shown here are rounded for display; calculations use the stored factor.
About Square inches
Square inches (in²) measures area under the conventions above. The base value in m² is (x × 0.00064516), where x is the numerical value in in². Factors shown here are rounded for display; calculations use the stored factor.
Definitions and sources
Keep these unit conventions consistent when using measurements in construction calculations.
Square centimeters to square inches reference table
| Square centimeters (cm²) | Square inches (in²) |
|---|---|
| 1 | 0.155000310001 |
| 5 | 0.775001550003 |
| 10 | 1.55000310001 |
| 25 | 3.87500775002 |
| 50 | 7.75001550003 |
| 100 | 15.5000310001 |
| 1000 | 155.000310001 |
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