Shaft Tolerance Calculator


Calculating shaft tolerances is crucial in engineering and manufacturing to ensure precise fits between mating components. With the help of this calculator, you can easily determine the appropriate tolerances for shafts, ensuring optimal performance and functionality.

How to Use

Simply input the desired parameters into the designated fields and click the “Calculate” button to obtain the calculated tolerance value.


The formula used for calculating shaft tolerances is as follows:

Tolerance=Basic Size+(IT Grade×Tolerance Grade)


  • Basic Size: The nominal size of the shaft.
  • IT Grade: The international tolerance grade.
  • Tolerance Grade: The specific tolerance grade required.

Example Solve

Let’s consider an example:

  • Basic Size: 25 mm
  • IT Grade: 6
  • Tolerance Grade: h7

Substituting these values into the formula, we get:

Tolerance=25+(6×0.014)=25+0.084=25.084 mm

Thus, the calculated tolerance for this example is 25.084 mm.


Q: What is the significance of shaft tolerances in engineering?
Shaft tolerances ensure proper fits between mating components, minimizing play and maximizing performance.

Q: How do I determine the appropriate IT grade for my application?
A: The IT grade depends on factors such as the precision requirements and industry standards of your specific application.

Q: Can this calculator be used for metric as well as imperial measurements?
A: Yes, the calculator supports both metric and imperial units for input and output.

Q: Are there any industry standards for shaft tolerances?
A: Yes, organizations such as ISO and ANSI provide standard tolerances for various applications.


Calculating shaft tolerances accurately is essential for ensuring proper functioning and longevity of mechanical systems. With the convenience of this calculator, engineers and manufacturers can streamline the design and production process, resulting in high-quality products with precise fits.

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