Skip to content
RK Calculator
Menu

Square Centimeters to Square Inches Converter

Convert square centimeters (cm²) to square inches (sq in), with the formula, a conversion table and exact factors.

Change the values and press Calculate to work out your own figures.

Enter an area, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.

A number, fraction (3/8), mixed number (1 1/2), scientific notation (2.5e6) or a simple sum such as 2*3.
The unit you want the answer in. Swap exchanges the two units.
Result
0.155000310001 sq in
square miles
3.86102158542 × 10⁻¹¹ sq mi
acres
2.47105381467 × 10⁻⁸ ac
square yards
0.00011959900463 sq yd
square feet
0.00107639104167 sq ft
square kilometers
1 × 10⁻¹⁰ km²
hectares
1 × 10⁻⁸ ha
ares
1 × 10⁻⁶ a
square meters
0.0001 m²
square millimeters
100 mm²
square micrometers
100,000,000 µm²

1 cm² = 0.155000310001 sq in

Show the working
  1. 1 cm² = 0.155000310001 sq in
  2. 1 × 0.155000310001 = 0.155000310001 sq in

How to convert square centimeters to square inches

1 cm² = 0.155000310001 sq in, so multiply by 0.155000310001 to go from square centimeters to square inches. Going the other way, 1 sq in = 6.4516 cm².

sq in = cm² × 0.155000310001
cm² = sq in × 6.4516

Worked example:

1 cm² = 0.155000310001 sq in
5 × 0.155000310001 = 0.775001550003 sq in

Square Centimeters to square inches table

Square CentimetersSquare Inches
1 cm²0.155000310001 sq in
2 cm²0.310000620001 sq in
3 cm²0.465000930002 sq in
4 cm²0.620001240002 sq in
5 cm²0.775001550003 sq in
6 cm²0.930001860004 sq in
7 cm²1.08500217 sq in
8 cm²1.24000248 sq in
9 cm²1.39500279001 sq in
10 cm²1.55000310001 sq in
15 cm²2.32500465001 sq in
20 cm²3.10000620001 sq in
25 cm²3.87500775002 sq in
30 cm²4.65000930002 sq in
40 cm²6.20001240002 sq in
50 cm²7.75001550003 sq in
75 cm²11.62502325 sq in
100 cm²15.5000310001 sq in
250 cm²38.7500775002 sq in
500 cm²77.5001550003 sq in
1000 cm²155.000310001 sq in

About the units

Square Centimeters (cm²)
Square centimeters, a metric unit. Definition: BIPM SI Brochure (SI prefixes).
Square Inches (sq in)
Square inches, a US customary unit. Definition: NIST Handbook 44 Appendix C (derived from the international inch).

Formula version 0.1.0Reviewed