Enter the bolt diameter (in) and the threads per inch into the Bolt Area Calculator. The calculator will evaluate the Bolt Area.

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## Bolt Area Formula

The following two example problems outline the steps and information needed to calculate the Bolt Area.

BA = .7854*[D-(.9734/n)]^2

- Where BA is the Bolt Area (in^2)
- D is the bolt diameter (in)
- n is the threads per inch

To calculate bolt area, subtract the value of .9374 divided by threads per inch from the bolt diameter, square the result, then multiply by .7854.

## How to Calculate Bolt Area?

The following example problems outline how to calculate Bolt Area.

Example Problem #1:

- First, determine the bolt diameter (in).
- The bolt diameter (in) is given as: 3.

- Next, determine the threads per inch.
- The threads per inch is provided as: 2.

- Finally, calculate the Bolt Area using the equation above:

BA = .7854*[D-(.9734/n)]^2`

The values provided above are inserted into the equation below and computed.

BA = .7854*[3-(.9734/2)]^2 = 4.96 (in^2)

Example Problem #2:** **

For this problem, the variables required are provided below:

bolt diameter (in) = 4

threads per inch = 8

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

BA = .7854*[D-(.9734/n)]^2`** = ?**