Square inch to Square centimeter Converter
Type a value — the answer appears instantly. 1 in² = 6.4516 cm².
Reviewed by the OmniCalc teamMethod verified 2026-07-01
6.4516 square centimeters
= 0.00064516 m²= 0.00694444 ft²
equals 6.4516 square centimetersFormula: cm² = in² × 6.4516
Square inch to Square centimeter formula
cm² = in² × 6.4516
Convert 5 square inches to square centimeters
- Start with 5 square inches.
- Multiply by the conversion factor: 5 × 6.4516 = 32.258.
- So 5 in² = 32.258 cm².
Square inch to Square centimeter conversion table
| Square inches (in²) | Square centimeters (cm²) |
|---|---|
| 0.01 in² | 0.064516 cm² |
| 0.1 in² | 0.64516 cm² |
| 0.25 in² | 1.6129 cm² |
| 0.5 in² | 3.2258 cm² |
| 1 in² | 6.4516 cm² |
| 2 in² | 12.9032 cm² |
| 3 in² | 19.3548 cm² |
| 4 in² | 25.8064 cm² |
| 5 in² | 32.258 cm² |
| 6 in² | 38.7096 cm² |
| 7 in² | 45.1612 cm² |
| 8 in² | 51.6128 cm² |
| 9 in² | 58.0644 cm² |
| 10 in² | 64.516 cm² |
| 15 in² | 96.774 cm² |
| 20 in² | 129.032 cm² |
| 25 in² | 161.29 cm² |
| 30 in² | 193.548 cm² |
| 40 in² | 258.064 cm² |
| 50 in² | 322.58 cm² |
| 75 in² | 483.87 cm² |
| 100 in² | 645.16 cm² |
| 250 in² | 1,612.9 cm² |
| 500 in² | 3,225.8 cm² |
| 1,000 in² | 6,451.6 cm² |
| 5,000 in² | 32,258 cm² |
| 10,000 in² | 64,516 cm² |
Unit definitions
What is a square inch?
The square inch is the area of a one-inch square, exactly 6.4516 square centimetres. It is used in the United States for pressures (pounds per square inch), print, and small surfaces. There are 144 square inches in a square foot.
What is a square centimeter?
The square centimetre is the area of a one-centimetre square, one ten-thousandth of a square metre. It is common for small surfaces such as screen areas, wounds, and material samples. One square metre contains ten thousand square centimetres.
Frequently asked questions
How many square centimeters are in one square inch?
One square inch equals 6.4516 square centimeters (1 in² = 6.4516 cm²).
How do I convert square inches to square centimeters?
Multiply the value in square inches by 6.4516. For example, 10 in² × 6.4516 = 64.516 cm².
Which is bigger — a square inch or a square centimeter?
A square inch is bigger: one square inch contains 6.4516 square centimeters.
Is this square inch to square centimeter converter free?
Yes — the converter is free, works offline once loaded, and computes instantly in your browser without sending your numbers to a server.
Conversion factors follow international definitions (SI / NIST). Last verified 2026-07-01.