Enter the tire sidewall height (in) and the tire width (in) into the Tire Aspect Ratio Calculator. The calculator will evaluate and display the Tire Aspect Ratio.

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## Tire Aspect Ratio Formula

The following formula is used to calculate the Tire Aspect Ratio.

**TAR = SH / W **

- Where TAR is the Tire Aspect Ratio (height:width)
- SH is the tire sidewall height (in)
- W is the tire width (in)

## How to Calculate Tire Aspect Ratio?

The following example problems outline how to calculate Tire Aspect Ratio.

Example Problem #1:

- First, determine the tire sidewall height (in).
- The tire sidewall height (in) is given as: 12.

- Next, determine the tire width (in).
- The tire width (in) is provided as: 15.

- Finally, calculate the Tire Aspect Ratio using the equation above:

TAR = SH / W

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

TAR = 12 / 15 = .8 (height:width)

Example Problem #2:** **

For this problem, the variables required are provided below:

tire sidewall height (in) = 13

tire width (in) = 16

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

TAR = SH / W ** = ?**