Enter the average atomic mass (g/mol) and the reference standard (g/mol) into the Atomic Ratio Calculator. The calculator will evaluate and display the Atomic Ratio.

## Atomic Ratio Formula

The following formula is used to calculate the Atomic Ratio.

**AR = AAM / RS**

- Where AR is the Atomic Ratio ( )
- AAM is the average atomic mass (g/mol)
- RS is the reference standard (g/mol)

## How to Calculate Atomic Ratio?

The following example problems outline how to calculate Atomic Ratio.

Example Problem #1:

- First, determine the average atomic mass (g/mol).
- The average atomic mass (g/mol) is given as: 3.67.

- Next, determine the reference standard (g/mol).
- The reference standard (g/mol) is provided as: 4.00.

- Finally, calculate the Atomic Ratio using the equation above:

AR = AAM / RS

The values given above are inserted into the equation below and the solution is calculated:

AR = 3.67 / 4.00 = .9175

Example Problem #2:** **

For this problem, the variables required are provided below:

average atomic mass (g/mol) = 7.89

reference standard (g/mol) = 9.00

Test your knowledge using the equation and check your answer with the calculator above.

AR = AAM / RS** = ?**