Tolerance Stack-Up Calculator

Tolerance Chain Visual

Hover over the image for a detailed view.

Basic Tolerance Chain Diagram Detailed Tolerance Chain Diagram

1. Chain Components

Enter each dimension and its sign convention as it affects the final gap. If increasing the dimension reduces the gap, use the negative sign; if it increases the gap, use the positive sign.

2. Analysis & Results

The final calculated gap based on a Worst Case summation.

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Gap Range by Method

Method
Min Gap
Max Gap
Worst Case
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RSS (±3σ)(Normal; 99.73% Conf.)
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RSS assumes independent contributors with normal distribution; each asymmetric band is treated as ±3σ, so σ = band width / 6.

Detailed Stack-up

+ - Tolerances

ISO 286/2768 Tolerance Assistant

Find ISO tolerance limits for a dimension.

Enter a dimension to see limits.