Square millimeters (mm²) to Square centimeters (cm²) Conversion
Square millimeters
The square millimetre is a unit of area equal to one millionth of a square metre (10⁻⁶ m²). In engineering, cross-sectional areas of wires and cables are standardised in square millimetres — electrical cable ratings specify conductor cross-sections in mm² (e.g., 1.5 mm², 2.5 mm², 4 mm²). In materials testing, stress is calculated as force per unit area in megapascals, where the area is expressed in square millimetres.
Square centimeters
The square centimetre is a unit of area equal to one ten-thousandth of a square metre (10⁻⁴ m²). It is commonly used in medicine for measuring wound areas, skin lesions, and body surface area calculations. In materials science, properties such as electrical conductivity and thermal resistance are sometimes expressed per square centimetre. Cross-sectional areas of cables and pipes in engineering are often specified in square centimetres.
| Square millimeters (mm²) | Square centimeters (cm²) |
|---|---|
| 0.1 mm² | 0.001 cm² |
| 1 mm² | 0.01 cm² |
| 2 mm² | 0.02 cm² |
| 3 mm² | 0.03 cm² |
| 5 mm² | 0.05 cm² |
| 10 mm² | 0.10 cm² |
| 20 mm² | 0.20 cm² |
| 30 mm² | 0.30 cm² |
| 50 mm² | 0.50 cm² |
| 100 mm² | 1.00 cm² |
| 1000 mm² | 10.00 cm² |
Frequently Asked Questions (FAQ)
How many square centimeters are in 1 square millimeters?
1 square millimeters (mm²) is exactly 0.01 square centimeters (cm²).
How do I convert square millimeters to square centimeters?
Multiply the value in square millimeters by 0.01 to get the result in square centimeters. Or use the converter above — type any number and see the result instantly.