Square Centimeters (cm²) to Square Inches (in²) Converter
Enter a value to instantly convert between area units.
1 Square Centimeter = 0.155 Square Inch
Key Formulas
Acre → Square Foot
ft² = ac × 43560Square Foot → Acre
ac = ft² × 0.0000229568Hectare → Acre
ac = ha × 2.47105Acre → Hectare
ha = ac × 0.404686Formula
in² = cm² × 0.15500031A square inch is 2.54 cm on each side, so 1 cm² = 0.155 in². Manufacturing engineers, product designers, and international trade specialists convert between cm² and in² daily when working with technical drawings, component sizes, and packaging specifications that span metric and imperial supply chains.
Source: NIST SP 811, Table B.8
Frequently Asked Questions
Real-World Examples
A hardware designer converting 10 cm² PCB area to in² for US manufacturer documentation.
10 cm² = 1.55 in²
A packaging engineer calculating 50 cm² product label area in in² for US retail packaging.
50 cm² = 7.75 in²
A machined part designer converting 100 cm² surface area to in² for tolerance specification.
100 cm² = 15.5 in²
A sheet metal fabricator converting 500 cm² component panel to in² for plasma cutting specs.
500 cm² = 77.5 in²