Enter the API into the Density From API Calculator. The calculator will evaluate and display the Density From API.

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## Density From API Formula

The following formula is used to calculate the Density From API.

D = 141.5/(API+131.5) * 998.9

- Where D is the Density From API (kg/m^3)
- API is the API

## How to Calculate Density From API?

The following example problems outline how to calculate Density From API.

Example Problem #1:

- First, determine the API.
- The API is given as: 55.

- Finally, calculate the Density From API using the equation above:

D = 141.5/(API+131.5) * 998.9

The values given above are inserted into the equation below:

D = 141.5/(55+131.5) * 998.9 = 757.878 (kg/m^3)

Example Problem #2:** **

For this problem, the variables needed are provided below:

API = 65

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.

D = 141.5/(API+131.5) * 998.9** = ?**