For Hobbyists & Makers · Tolerance Stack-Up
Tolerance Stack-Up for a quality check
Built for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker. Simulate a quality check live below — adjust the inputs and watch it respond, right in your browser.
Tolerance Stack-UpLive
worst-case vs statistical
Controls
Presets
When parts stack in an assembly, their tolerances accumulate. Worst-case analysis simply adds them — safe but pessimistic, since all parts rarely hit their extremes together. Statistical (root-sum-square) analysis adds them in quadrature, giving a much tighter, more realistic range. Choosing between them decides how much precision — and cost — each part really needs.
Data Inspector
Worst-case total±0.50 mm
Statistical (RSS)±0.22 mm
RSS savings55% tighter
Governing equation
Reading this result: Across 5 parts, RSS (±0.22 mm) is 55% tighter than the worst-case ±0.50 mm — enough headroom to relax individual part tolerances and cut cost.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
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Frequently asked questions
- Is this good for hobbyists & makers?
- Yes — this version of "Tolerance Stack-Up for a quality check" is framed for hobbyists & makers exploring it for fun. Play with real physics and math, no license and no setup — just open and tinker.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.