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Podcast: The Occupational Safety Leadership Podcast
Episode: Episode 39 - Converting mg-M3 to Parts Per Million (PPM)
Description: In this episode, Dr. Ayers explains how to convert airborne contaminant concentrations measured in mg/m³ into parts per million (PPM)—a calculation safety professionals often need when comparing sampling results to OSHA or ACGIH exposure limits.
The episode focuses on understanding the conversion formula, when to use it, and how to automate the calculation for consistent, error‑free reporting.
🔍 Key Concepts Covered
1. Why mg/m³ and PPM Are Different
mg/m³ measures mass per volume
PPM measures volume per volume Because gases expand and contract with temperature and molecular weight, you can’t convert bet...