Calculators for measuring bores

Hole calc provides calculators to help machinists, craftspeople, engineers and designers measure any bore diameter using three gage pins, or any other cylinders of known diameter. Questions? Read the guide

Given a gage pin nominal diameter, tolerance class and sign, this calculator provides the diameter range of that gage pin according to ASME B89.1.5-1998.

Diagram of pin gage for gage size calculator