Convert Square Centimeters to Square Millimeters
One square centimeter equals 100 square millimeters. Type any value to convert square centimeters to square millimeters instantly — with a full reference table below.
Convert Square Centimeters to Square Millimeters
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How to convert Square Centimeters to Square Millimeters
To convert square centimeters to square millimeters, multiply by 100. One square centimeter equals 100 mm², and one square millimeter equals 0.01 cm².
- Take the value in square centimeters — for example 7.5 cm².
- Multiply by 100 (the number of square millimeters in one square centimeter).
- 7.5 × 100 = 750 mm².
Shortcut: the factor is a power of ten, so just move the decimal point 2 places to the right.
Square Centimeters to Square Millimeters conversion table
| Square Centimeters | Square Millimeters |
|---|---|
| 1 cm² | 100 mm² |
| 2 cm² | 200 mm² |
| 3 cm² | 300 mm² |
| 5 cm² | 500 mm² |
| 10 cm² | 1,000 mm² |
| 20 cm² | 2,000 mm² |
| 50 cm² | 5,000 mm² |
| 100 cm² | 10,000 mm² |
| 200 cm² | 20,000 mm² |
| 500 cm² | 50,000 mm² |
| 1,000 cm² | 100,000 mm² |
| 5,000 cm² | 500,000 mm² |
| Square Millimeters | Square Centimeters |
|---|---|
| 1 mm² | 0.01 cm² |
| 2 mm² | 0.02 cm² |
| 3 mm² | 0.03 cm² |
| 5 mm² | 0.05 cm² |
| 10 mm² | 0.1 cm² |
| 20 mm² | 0.2 cm² |
| 50 mm² | 0.5 cm² |
| 100 mm² | 1 cm² |
| 200 mm² | 2 cm² |
| 500 mm² | 5 cm² |
| 1,000 mm² | 10 cm² |
| 5,000 mm² | 50 cm² |
About converting Square Centimeters to Square Millimeters
Square Centimeters (cm²) and Square Millimeters (mm²) are both units of area. The exact factor is 1 cm² = 100 mm², so multiply by 100 to go from square centimeters to square millimeters (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Square Millimeters to Square Centimeters converter, or the full unit converter for every unit at once.
Real-world area in square centimeters and square millimeters
| Example | Square Centimeters | Square Millimeters |
|---|---|---|
| A4 sheet of paper | 623.7 cm² | 62,370 mm² |
| A car parking space (2.5 × 5 m) | ≈ 125,000 cm² | ≈ 12,500,000 mm² |
| A doubles tennis court (23.77 × 10.97 m) | 2,607,569 cm² | 260,756,900 mm² |
| An NBA basketball court (94 × 50 ft) | 4,366,443 cm² | 436,644,300 mm² |
“≈” marks typical values; the rest are defined or measured figures.
The units
A square 1 cm on each side.
Used for: Small surfaces, labels and wound dressings.
A square 1 mm on each side.
Used for: Electrical cable cross-sections (e.g. 1.5 mm², 2.5 mm² wire) and small components.
Area factors are the squares of exact length factors, so they are exact too (an international acre is exactly 4,046.8564224 m²).