Enter the total charge and total surface area into the calculator to determine the surface charge density.

## Surface Charge Density Formula

The following formula is used to calculate a surface charge density.

CD = q / A

- Where CD is the surface charge density (C/m^2)
- q is the total charge over the surface (C)
- A is the total area (m^2)

## Surface Charge Density Definition

A surface charge density is a measure of electric charge per unit of area.

## Surface Charge Density Example

How to calculate surface charge density?

**First, measure the area.**Measure the total area that has a charge.

**Next, measure the charge.**Measure the total electrical charge acting over the area from step 1.

**Finally, calculate the surface charge density.**Calculate the surface charge density by dividing the charge by total area.

## FAQ

**What is a surface charge density?**

A surface charge density is a measure of charge acting on an object per unit area. Since charges often act on entire surfaces, it’s helpful to understand charges per unit area.