Sectional Density Calculator

Enter the mass of the object and the cross-sectional area across the axis to determine the sectional density.

Sectional Density Formula

The follow formula is used to calculate a sectional density.

SD = M / A

  • Where SD is the sectional density
  • M is the mass of projectile
  • A is the cross-sectional area

Sectional Density Definition

A sectional density is defined as the ratio of an object, typically a projectile or bullet, and the cross sectional area of the given axis. This is a mass per unit area while typical density is a mass per unit volume.

Sectional Density Example

How to calculate a sectional density?

  1. First, determine the mass of the projectile.

    Measure the mass of the projectile.

  2. Next, determine the cross-sectional area.

    Measure of calculate the cross-sectional area of the projectile.

  3. Finally, calculate the sectional density.

    Calculate the sectional density using the formula above.


What is the sectional density of an M107 projectile.

The sectional density of an M107 is .180 kg/cm^2.

sectional density calculator
sectional density formula