Enter the total number of moles of substance and the total volume of substance into the Number Density Calculator. The calculator will evaluate the Number Density.

## Number Density Formula

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

ND = n / V

Variables:

- ND is the Number Density (moles / volume)
- n is the total number of moles of substance
- V is the total volume of substance

To calculate the number density, divide the number of moles by the total volume.

## How to Calculate Number Density?

The following steps outline how to calculate the Number Density.

- First, determine the total number of moles of substance.
- Next, determine the total volume of substance.
- Next, gather the formula from above = ND = n / V.
- Finally, calculate the Number 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.

total number of moles of substance = 5,000

total volume of substance = 3

ND = n / V** **= ?