Calculate Hole Position from Drawing Dimensions
True Position is built for the first calculation step after reading a GD&T callout on an engineering drawing. Enter the measured X Actual and Y Actual values, then pair them with the Basic X Dim and Basic Y Dim values that define the theoretical location. Add the hole's actual, maximum, and minimum diameter values and the stated position tolerance.
The calculator keeps these inputs together so a machinist, inspector, or manufacturing engineer can move from drawing numbers to a position result without rebuilding the formula on paper. It is suited to a quick check at a workstation or on a phone when a feature needs a clear location comparison.
Compare Radial and Diametric Position
Position results can be read in both radial and diametric form, which helps match the calculation to the way a drawing or inspection note expresses the tolerance. After the dimensions are entered, the result area presents the calculated True Position and related tolerance values in one place.
Use the displayed value to compare the feature's positional deviation with the allowed tolerance from the drawing. The separate result lines make it easier to distinguish the calculated position, the available tolerance, and any remaining difference when reviewing a hole during manufacturing inspection. This view is useful when the drawing specifies a diameter-based zone but the inspection note uses radial distance.
Work with Basic Dimensions and Material Conditions
Basic dimensions provide the reference values for the theoretical location, while material-condition controls help account for how feature size affects the available tolerance. True Position includes Maximum Material Condition calculations and exposes the diameter values needed to review the hole against its size limits.
This is useful when an inspection decision depends on more than the center-point deviation alone. Enter the actual diameter together with maximum and minimum limits, then review the MMC bonus tolerance and the position figures. Keeping size and location in the same calculation gives a more complete reading of a drawing's position requirement. It also keeps the basic reference and size limits visible while the tolerance is interpreted.
Keep a Practical Inspection Reference
The compact calculator layout puts dimension fields, tolerance controls, and the result area on a single focused workflow. A Help entry is available when a symbol or input needs a quick reminder, and the optional custom keyboard can make repeated numeric entry more convenient on a phone.
True Position fits machinists, quality inspectors, and engineers who need a specialized GD&T calculation while reading drawings or checking manufactured features. It is also useful for learners practicing position calculations, but it is not a general calculator or a CAD replacement. Keep the drawing's units and tolerance convention in view while entering values so the result stays aligned with the task.
