Scratch/Dig Calculator

Whether you’re an engineer or quality assurance professional, it can be challenging to gauge optical surface quality when working with outdated standards, variable measurements, or a lack of visual context.

At Swift Glass, we aim to ease this process while maximizing accuracy with our reliable Scratch/Dig Calculator. Our calculator tool functions as more than just a reference table, providing you with a reliable solution for daily calculations of surface quality to validate parts while maintaining compliance with the latest industry standards.

Surface Quality Calculator (MIL-PRF-13830B)

Determine pass/fail status based on accumulated defects.

    Disclaimer: This tool uses simplified logic based on MIL-PRF-13830B guidelines (max scratch accumulation < 1/4 diameter; sum of digs < 2x max dig size). Scratch numbers refer to visual brightness standards; widths used here are industry approximations. Swift Glass is not liable for inspection errors based on this tool.