Tolerance Stack Up Calculator May 2026

5 minutes We’ve all been there. You design ten perfect parts, but when they come together on the assembly line, the shaft won’t fit in the hole. Or the gap between two covers is 0.5mm too wide.

If you aren’t calculating it, you’re gambling with your production schedule. In this post, I’ll show you how to build a simple (and why you need more than just worst-case math). What Is Tolerance Stack-Up? Tolerance stack-up is the cumulative effect of individual part tolerances on an assembly’s final dimension (gap, interference, or total length). tolerance stack up calculator

Stop Guessing: How to Use a Tolerance Stack-Up Calculator (Free Template Inside) 5 minutes We’ve all been there