Square Inches to Square Centimeters Converter
Convert square inches to square centimeters instantly. Type a value, change either unit, or press swap to go the other way. 1 square inch = 6.4516 square centimeters.
1 square inch = 6.4516 square centimeters
How to convert square inches to square centimeters
square centimeters = square inches × 6.4516
To convert square inches to square centimeters, multiply the value by 6.4516. To go back from square centimeters to square inches, divide by the same number (or multiply by 0.15500031).
Worked examples
- 4 in²: 4 × 6.4516 = 25.8064 cm²
- 6 in²: 6 × 6.4516 = 38.7096 cm²
- 10 in²: 10 × 6.4516 = 64.516 cm²
Multiply by 6.45. Because 1 inch is 2.54 cm, one square inch is exactly 2.54 × 2.54 = 6.4516 cm².
Square Inches to Square Centimeters conversion table
Square Inches to Square Centimeters
| in² | cm² |
|---|---|
| 1 | 6.4516 |
| 2 | 12.9032 |
| 4 | 25.8064 |
| 6 | 38.7096 |
| 10 | 64.516 |
| 24 | 154.8384 |
| 50 | 322.58 |
| 100 | 645.16 |
| 500 | 3,225.8 |
| 1,000 | 6,451.6 |
Square Centimeters to Square Inches
| cm² | in² |
|---|---|
| 1 | 0.15500031 |
| 2 | 0.31000062 |
| 4 | 0.62000124 |
| 6 | 0.93000186 |
| 10 | 1.5500031 |
| 24 | 3.7200074 |
| 50 | 7.7500155 |
| 100 | 15.500031 |
| 500 | 77.500155 |
| 1,000 | 155.00031 |
Area equivalents
See how one square inch and one square centimeter compare with every other area unit on the site.
1 square inch equals
| Unit | Value |
|---|---|
| square centimeters (cm²) | 6.4516 |
| square feet (ft²) | 0.006944444 |
| square yards (yd²) | 0.0007716049 |
| square meters (m²) | 0.00064516 |
| acres (ac) | 1.594225 × 10-7 |
| hectares (ha) | 6.4516 × 10-8 |
| square kilometers (km²) | 0 |
| square miles (mi²) | 0 |
1 square centimeter equals
| Unit | Value |
|---|---|
| square inches (in²) | 0.1550003 |
| square feet (ft²) | 0.001076391 |
| square yards (yd²) | 0.000119599 |
| square meters (m²) | 0.0001 |
| acres (ac) | 2.471054 × 10-8 |
| hectares (ha) | 1 × 10-8 |
| square kilometers (km²) | 0 |
| square miles (mi²) | 0 |
When you need to convert square inches to square centimeters
Screen areas, printed circuit boards, photo prints and engine components are often specified in square inches, while metric drawings use square centimeters. A precise conversion avoids errors in design and manufacturing.
About the units
Square inch (in²)
A square inch is a square that is one inch on each side, exactly 6.4516 square centimeters.
Square centimeter (cm²)
A square centimeter is a square 1 cm on each side. It is used for small surfaces such as stamps, screens and cross-sections.
Frequently asked questions
How do I convert square inches to square centimeters?
Multiply the number of square inches by 6.4516. For example, 10 square inches × 6.4516 = 64.516 square centimeters.
How many square centimeters are in one square inch?
There are 6.4516 square centimeters in one square inch.
How many square inches are in one square centimeter?
There are 0.15500031 square inches in one square centimeter.
How big is an A4 sheet in square inches?
An A4 sheet is 210 × 297 mm, which is 623.7 cm² or 96.7 square inches. A US Letter sheet (8.5 × 11 in) is 93.5 square inches.
Can I convert other area units with this tool?
Yes. Use the From and To drop-downs in the converter to choose any area unit, or press the swap button to reverse the conversion. All calculations use internationally defined conversion factors.