Limit sizes
Shows the minimum and maximum size of the hole and shaft separately.
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Fit and tolerance calculator
Turn drawing deviations into limit sizes and clearly identify clearance, interference or transition fit.
Hole and shaftClearance / interferencemm, µm, inch, thouLocal calculations
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Fit results without sign confusion
The calculator adds deviations to nominal size and compares the worst-case combinations of hole and shaft limits.
Formula and terminology reference: ISO 286-1.
Clearance and interference
Positive hole-minus-shaft means clearance; negative means interference; a range crossing zero is transition.
Manual deviations
Enter values from the current drawing or source table instead of relying on a hidden tolerance database.
FAQ
Frequently asked questions
How is the result sign interpreted?
A positive hole-minus-shaft difference is clearance. A negative difference is interference.
Does the calculator include complete ISO 286 tables?
No. ISO 286 defines the class system; this tool accepts deviations from source documentation and calculates the resulting fit.
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