Enter the number of atoms in the plane and the total area of the plane into the Planar Density Calculator. The calculator will evaluate the Planar Density.

## Planar Density Formula

The following two example problems outline the steps and information needed to calculate the Planar Density.

PD = A / PA

Variables:

- PD is the Planar Density (atoms/area)
- #A is the number of atoms in the plane
- PA is the total area of the plane

To calculate the planar density, divide the number of atoms in the plane by the total area of the plane.

## How to Calculate Planar Density?

The following steps outline how to calculate the Planar Density.

- First, determine the number of atoms in the plane.
- Next, determine the total area of the plane.
- Next, gather the formula from above = PD = #A / PA.
- Finally, calculate the Planar Density.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

number of atoms in the plane = 1000

total area of the plane = 2.5

PD = #A / PA** **= ?