Enter the average precision and the average tolerance into the Precision to Tolerance Ratio Calculator. The calculator will evaluate and display the Precision to Tolerance Ratio.

## Precision to Tolerance Ratio Formula

The following formula is used to calculate the Precision to Tolerance Ratio.

PTR = P / T
• Where PTR is the Precision to Tolerance Ratio ( )
• P is the average precision
• T is the average tolerance

To calculate the precision to tolerance ratio, divide the average precision by the average tolerance.

## How to Calculate Precision to Tolerance Ratio?

The following example problems outline how to calculate Precision to Tolerance Ratio.

Example Problem #1:

1. First, determine the average precision.
• The average precision is given as: 4.5.
2. Next, determine the average tolerance.
• The average tolerance is provided as: 6.75.
3. Finally, calculate the Precision to Tolerance Ratio using the equation above:

PTR = P / T

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

PTR = 4.5 / 6.75 = .666

Example Problem #2:

For this problem, the variables required are provided below:

average precision = 8.00

average tolerance = 9.25