True Position Calculator
Calculate the true position of a feature relative to its datum based on measured deviations in X and Y coordinates. Ideal for GD&T inspection in manufacturing.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the True Position Calculator
- Enter X Deviation – Input the measured deviation along the X axis (e.g., 0.002). Use any unit (metric or imperial) as long as both axes use the same unit.
- Enter Y Deviation – Input the measured deviation along the Y axis (e.g., 0.003).
- Click "Calculate True Position" – The result appears instantly, showing the true position value (2 × √(ΔX² + ΔY²)).
- Read the Result – The output is displayed with 4 decimal places. The formula breakdown is shown below for verification.
Note: Both values must be numeric and non-empty. If an error occurs, check your inputs and try again.
Previous Results
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Frequently Asked Questions
True position is a geometric tolerance that defines the exact location of a feature relative to a datum reference frame. It is calculated as twice the radial distance of the measured deviation from the ideal location.
True Position = 2 × √(ΔX² + ΔY²), where ΔX and ΔY are the measured deviations from the nominal X and Y coordinates.
Use consistent units (e.g., inches or millimeters). The result will be in the same unit as the input deviations.