Use this tool to quickly calculate how multiple dimensions and their tolerances add up in an assembly. Understand worst-case limits for critical fits and gaps, check if parts will align, and avoid costly rework. For example, test how ten parts affect a total length or a clearance. Learn more in How to Apply Tolerances and Engineering Drawings Best Practices.
Setup the table
Use the method described in How to Conduct a Tolerance Analysis. Here, S represents the space available after adding or subtracting each dimension in the stack.
Important:
This calculator uses a period [ . ] as the decimal separator. Always use a dot for decimals when entering nominal sizes or tolerances.
Column Descriptions
Dimension 1:
It is recommended to start with the hole dimension. The remaining dimensions will typically be decreasing (mainly shafts or fillers).
Nominal:
The nominal (basic) size of the dimension.
Tolerances:
The manufacturing tolerance of the dimension, entered as a symmetrical ± value.
Type:
Select Increasing for holes or spaces that add to S, and Decreasing for shafts or elements that subtract from S.
When you calculate the form, the page will reload, and the calculated result will appear at the top. Good luck with your project!
Tolerance Stack-up Calculator
Enter up to 10 dimensions with their tolerances and specify whether they increase or decrease the space S.
Disclaimer
This calculator is a beta version and should be double-checked before use in real projects. For detailed guidance on how to calculate a tolerance stack-up manually, see our guide How to Calculate a Tolerance Chain.
