A convenient guide for Geometric Dimensioning and Tolerancing (GD&T) symbols at your fingertips. Click on the links below to learn more about each GD&T symbol or concept.

Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances via a symbolic language on engineering drawings and computer …

Jun 6, 2025 · Geometric Dimensioning and Tolerancing (GD&T or GD and T) is a standardized system that uses symbolic language to define and communicate product geometry, design …

As the diameters of the holes increase to 10.5mm diameter, the tolerance zones increase proportionately to 0.75mm diameter. The tolerances. in this example, apply to the center …

This page explains the differences between size tolerance and geometric tolerance, as well as the advantages of geometric dimensioning and tolerancing, and the principle of independency.

GD&T is a set of rules and symbols describing a part’s nominal geometry and the permissible variation range. It emphasizes the part’s function and parts assembly, allowing for larger …

Geometric Dimensioning and Tolerancing (GD&T) is a system of symbols and standards used in engineering drawings and models to specify the required form, size, orientation, and location …