EC to PPM Conversion Guide: Mastering Hydroponic Conductivity
Home > Hydroponic Systems > EC to PPM Conversion Guide: Mastering Hydroponic Conductivity Last Reviewed: August 2026 | Author: Wara Danish, MSc Plant Biology | Fact-Checked: Analytical Electrochemistry & CEA Lab Verified | Expert Reviewer: Faisal Habib, Commercial Hydroponics Specialist Difficulty: Beginner to Intermediate | Testing Time: 5 Minutes | Equipment Cost: $20 – $80 | Precision Target: ±0.05 mS/cm ⚡ Quick Answer: EC to PPM Conversion Guide Executing an ec to ppm conversion requires multiplying your Electrical Conductivity reading (in mS/cm) by your meter’s specific conversion factor: 500 for the Hanna scale (1.0 mS/cm = 500 PPM), 700 for the Bluelab/Truncheon scale (1.0 mS/cm = 700 PPM), or 640…