The Fastest Way to Create Tolerance Stackups.
StackLogic helps you build tolerance loops directly from assembly screenshots — eliminating hours of manual work in PowerPoint and Excel.
Free version includes up to 5 tolerance stack entries. Windows desktop application. No credit card required.
On Every Analysis ◎ Increase Accuracy
Reduce Errors ▤ Professional Reports
In Minutes
Why StackLogic?
Everything You Need. Nothing You Don’t.
Import & Analyze
Import any assembly screenshot or cross-section. Start your analysis in seconds.
Create Tolerance Loops
Define your tolerance path with simple clicks. Visual and intuitive.
Instant Calculations
Get Worst Case, RSS, and more — instantly. See results update in real-time.
Visualize Contributors
Easily identify which dimensions drive variation with sensitivity analysis.
Export & Share
Generate professional reports and share with your team or stakeholders.
How StackLogic Works
Create a Visual Tolerance Stackup From an Assembly Screenshot.
StackLogic is built around the way mechanical engineers already work. Start with a cross-section image, define the tolerance loop visually, then enter the dimensional contributors directly into the stackup table.
Import a screenshot or cross-section
Use images from CAD, drawings, design reviews, or quick engineering markups.
Click through the tolerance loop
Select the path points and StackLogic creates labeled arrows and loop segments.
Enter part and dimension data
Add nominal values, tolerances, direction, part numbers, and descriptions in one table.
Review the calculated stackup
See nominal, worst-case, RSS, max/min, and variance results update automatically.
Save project or export report
Ability to save your project as well as export a full PDF report.
Designed to save you time
From Hours of Manual Work to Minutes.
Trusted by engineers
Engineers Love StackLogic.
“StackLogic has completely changed the way I do tolerance analysis. What used to take me hours in Excel now takes minutes.”
“The visual loop creation is a game changer. It’s intuitive, fast, and saves me from the PowerPoint + Excel nightmare.”
“Finally, a tool made by engineers who actually understand the problem. Highly recommended.”
Built for Mechanical Engineers Working In
Ready to Transform Your Tolerancing Workflow?
Be the first to experience StackLogic.
No credit card required.