True Position Calculator
Construction & Home ImprovementCheck whether a measured hole or feature position falls within a GD&T true position tolerance.
True Position Deviation
Calculated true position value, per the ASME Y14.5 GD&T formula.
Result
Pass - within tolerance
Whether the measured position falls within the stated tolerance zone.
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Odeh Ahwal0people find this calculator helpful
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Construction & Home Improvement calculators
Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Construction & Home Improvement calculators
Frequently Asked Questions
How is true position calculated?
True position equals two times the square root of the sum of the squared X and Y deviations from the nominal, or true, location. This is the standard formula defined in the ASME Y14.5 geometric dimensioning and tolerancing standard.
Why is the result multiplied by two?
Position tolerance is specified as a diameter of an allowed tolerance zone, not a radius, so the calculated deviation is doubled to compare directly against the stated diameter tolerance.
What do X and Y deviation mean here?
They are the measured difference between the actual location of a feature, such as a hole center, and its nominal or intended location, along two perpendicular axes.
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