How many square centimeters are in one square inch?
One square inch contains exactly 6.4516 square centimeters.
Convert Square centimeter (cm²) to Square inch (in²) instantly.
Calculation
value × 0.155000310001
| Quick Conversion | Converted |
|---|---|
| 1 cm² | 0.155 in² |
| 5 cm² | 0.775002 in² |
| 10 cm² | 1.550003 in² |
| 100 cm² | 15.500031 in² |
| 1,000 cm² | 155.00031 in² |
A square centimeter is the area of a square one centimeter long and one centimeter wide.
Square centimeters are widely used for small metric surfaces in education, product measurement, crafts, and lab work.
cm2 is used for labels, samples, product faces, screens, templates, craft pieces, and small panels.
A square inch is the area of a square one inch long and one inch wide.
Square inches are used in customary measurement for small surfaces where square feet would be too broad.
in2 is used for labels, screens, product faces, stickers, parts, cutouts, and small technical surfaces.
Mathematically, square inch (in²) = square centimeter (cm²) converted with the formula below.
1 cm² = 0.155 in²
1 in² = 6.4516 cm²
Formula: value × 0.155000310001
Example: 15 cm² = 2.325005 in²
Precision note: The cm2 to in2 factor is exact through the inch-centimeter definition. Round based on the physical tolerance of the part, label, or surface being measured.
1 cm² = 0.155 in²
1 in² = 6.4516 cm²
| Square centimeter [cm²] | Square inch [in²] |
|---|---|
| 0.01 cm² | 0.00155 in² |
| 0.1 cm² | 0.0155 in² |
| 1 cm² | 0.155 in² |
| 2 cm² | 0.310001 in² |
| 5 cm² | 0.775002 in² |
| 10 cm² | 1.550003 in² |
| 20 cm² | 3.100006 in² |
| 50 cm² | 7.750016 in² |
| 100 cm² | 15.500031 in² |
One square inch contains exactly 6.4516 square centimeters.
2.54 converts inches and centimeters as lengths. Area uses both width and height, so the square-inch relationship is 2.54 × 2.54, or 6.4516 cm2.
Use in2 for small surfaces such as labels, screens, parts, and samples. Use ft2 for larger surfaces such as rooms, panels, or floor areas.