meter is shown in the conversion table above.

Grams per square millimeter

Using grams per square millimeter (g/mm²), the formula then becomes:

Where:
* SD_g/mm² is the sectional density in grams per square millimeters
* m_g is the mass of the projectile in grams
* d_mm is the diameter of the projectile in millimeters

For example, a small arms bullet with a mass of 10.4 g and having a diameter of 6.70 mm has a sectional density of:
:

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