Square Centimeters ↔ Square Inches Converter
Convert between square centimeters and square inches instantly
Enter square centimeters to convert to square inches
Enter square inches to convert to square centimeters
Conversion Result
100 cm² = 15.5 in²
Approximately 15.5 square inches
📚 Square Centimeters ↔ Square Inches Conversion Details
CM² to IN² Formula
in² = cm² ÷ 6.4516
To convert square centimeters to square inches, divide by 6.4516.
IN² to CM² Formula
cm² = in² × 6.4516
To convert square inches to square centimeters, multiply by 6.4516.
Bidirectional Conversion
This converter works both ways simultaneously:
- Type in cm² → in² updates automatically
- Type in in² → cm² updates automatically
- No buttons to click - works as you type
Common Uses
- Paper sizes (A4, Letter, etc.)
- Fabric and material calculations
- Electronic screen areas
- Construction and flooring
📏 How This Converter Works
This is a bidirectional converter that works in real-time:
- CM² → IN²: When you type in the cm² field, the in² field automatically updates
- IN² → CM²: When you type in the in² field, the cm² field automatically updates
- No swapping needed: Both conversions happen simultaneously
- Real-time: Updates happen as you type, no button clicks required
// Bidirectional Conversion Logic:
in² = cm² ÷ 6.4516
cm² = in² × 6.4516
// Example 1: Type "100" in cm²
in² = 100 ÷ 6.4516 = 15.5
// Example 2: Type "31" in in²
cm² = 31 × 6.4516 = 200
in² = cm² ÷ 6.4516
cm² = in² × 6.4516
// Example 1: Type "100" in cm²
in² = 100 ÷ 6.4516 = 15.5
// Example 2: Type "31" in in²
cm² = 31 × 6.4516 = 200
📊 Conversion Table
| Square Centimeters | Square Inches | Common Use |
|---|---|---|
| 6.45 cm² | 1 in² | Basic unit |
| 64.5 cm² | 10 in² | Small screen |
| 100 cm² | 15.5 in² | Postcard size |
| 645 cm² | 100 in² | Large tablet |
| 1000 cm² | 155 in² | Monitor screen |
| 2580 cm² | 400 in² | Large poster |
❓ Frequently Asked Questions
Q: How many square inches are in one square centimeter?
A: There are approximately 0.155 square inches in one square centimeter.
Q: How many square centimeters are in one square inch?
A: There are exactly 6.4516 square centimeters in one square inch.
Q: Why is the conversion factor 6.4516?
A: Because 1 inch = 2.54 cm, so 1 square inch = 2.54 × 2.54 = 6.4516 square centimeters.
Q: Is this converter accurate for large areas?
A: Yes, the converter provides exact calculations up to 4 decimal places.