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Tolerance Quest

Professional tolerance stackup analysis with clean model bays, deterministic limit checks, statistical yield targets, and reusable local stackup files.

Explore stackupsOpen calculator
SessionPublic accessFree engineering calculator
Worst-case gateDeterministic pass/fail stays visible.
Yield targetStatistical modules compare calculated yield against your acceptance target.
ReportsInputs, outputs, drawings, zones, and PDF reference.

Stackup library

Analysis Modules

What this module checks

Rectangular Clearance

Use this when two or more clearance holes must align with one fastener in an X/Y rectangular tolerance scheme.

InputsEach part needs drawing number, sheet, zone, hole diameter, hole tolerance, coating, and X/Y positional tolerance. The fastener needs nominal diameter, max diameter, and grip length.Design leverLarger hole diameter, smaller coating, lower positional tolerance, lower hole tolerance, shorter fastener length, or a smaller fastener max diameter improve the pass margin.

Active module

Rectangular Clearance

Calculation information

Use this when two or more clearance holes must align with one fastener in an X/Y rectangular tolerance scheme.

Inputs

Each part needs drawing number, sheet, zone, hole diameter, hole tolerance, coating, and X/Y positional tolerance. The fastener needs nominal diameter, max diameter, and grip length.

Calculation

Calculation method runs in the backend service; the browser shows returned margins, status, and contributor rankings only.

How to improve pass margin

Larger hole diameter, smaller coating, lower positional tolerance, lower hole tolerance, shorter fastener length, or a smaller fastener max diameter improve the pass margin.

Result board

Risk Readout

Run a module to review limits, yield where applicable, contributors, and report output.