By definition, 1 inch = 2.54 centimeters (exact). Area scales with the square of linear measure:
in² × (2.54 cm / 1 in)² = in² × 6.4516 = cm²
Reverse conversion uses the reciprocal factor 1 / 6.4516 ≈ 0.15500031.
- Supports scientific notation input such as 3.2e3.
- Rounding is applied only to the displayed value.
- Copy buttons place the formatted number onto your clipboard.
1) What is the exact conversion factor from square inches to square centimeters?
One square inch equals 6.4516 square centimeters because 1 inch = 2.54 centimeters exactly and area scales with the square of the linear factor.
2) Can I enter scientific notation like 1.2e5?
Yes. Both inputs accept scientific notation such as 1e3 or 2.5E-2 and the result updates instantly.
3) How does precision affect results?
Precision only rounds the displayed value. The underlying calculation keeps full double precision for accuracy.
4) How do I share my calculation?
Use the Create shareable link button. It updates the page URL with your inputs so you can bookmark or send it.
5) How do I convert the other way from square centimeters to square inches?
Enter a value in the square centimeters field. The square inches field updates using the reciprocal factor 1/6.4516.
6) What separators can I use in batch mode?
You can separate values with spaces, new lines, or semicolons. Scientific notation works in batch mode too.
7) Why does my pasted value look different after copying?
The copy buttons use your current precision and notation settings. Increase precision or switch notation to see more or fewer digits.