True Position GD&T Calculator

Fantazey App

About this app

A professional GD&T True Position calculator designed for CNC operators, CMM programmers, and QC inspectors on the shop floor. Enter your basic dimensions, actual measured coordinates, and geometric tolerance — get an instant PASS / FAIL result with a live visual inspection target.

Key Engineering Features:
✔ True Position formula: 2 × √(ΔX² + ΔY²)
✔ MMC bonus tolerance (hole grows → bonus grows)
✔ LMC bonus tolerance (hole shrinks → bonus grows)
✔ RFS mode — no bonus, pure geometric tolerance
✔ Imperial (inches) ↔ Metric (mm) with instant value conversion
✔ Animated inspection target with tolerance zone overlay
✔ Feature size validation with out-of-limits warning

Designed for greasy hands and bright shop floor lighting. Features large input fields, rapid-fire data entry, and a high-contrast dark UI.

Stop guessing your position tolerance and manual trigonometry. Whether you are working with ASME Y14.5 or ISO 1101 standards, this GD&T calculator eliminates calculation bottlenecks. Download the ultimate QC machinist tool today and upgrade your CNC inspection toolkit!

What’s new

- True Position calculator with live inspection target
- RFS, MMC and LMC material condition modifiers
- Automatic bonus tolerance calculation
- Instant PASS / FAIL verdict
- Imperial (inch) and Metric (mm) with instant conversion
- Visual tolerance zone with deviation point on target