Square Millimeter
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Area of a 1 mm square
About Square Millimeter (mm²)
One millionth of a square meter, the square millimeter is used in electrical engineering for wire cross-sectional area (e.g., 2.5 mm-squared cable), precision machining tolerances, and microscopy field measurements. Electrical cables in metric countries are specified by their cross-section in square millimeters.
- Category
- Area
- Symbol
- mm²
- Also known as
- square millimetre sq mm mm2
CONVERT TO
Frequently Asked Questions
What is a Square Millimeter (mm²)?
Area of a 1 mm square
How many Square Meter (m²) are in one Square Millimeter (mm²)?
One Square Millimeter (mm²) equals 0.000001 Square Meter (m²).
How many Square Kilometer (km²) are in one Square Millimeter (mm²)?
One Square Millimeter (mm²) equals 1 × 10⁻¹² Square Kilometer (km²).
How many Square Centimeter (cm²) are in one Square Millimeter (mm²)?
One Square Millimeter (mm²) equals 0.01 Square Centimeter (cm²).
How do I convert Square Millimeter to Square Meter?
To convert Square Millimeter to Square Meter, multiply the value by 0.000001 (1 mm² = 0.000001 m²).