Nutrient PPM/EC Calculator
Convert between PPM (parts per million) and EC (electrical conductivity) for cannabis nutrient solutions. Supports multiple PPM scales (500 and 700).
Frequently Asked Questions
What PPM should cannabis be at?
Seedlings: 200-400 PPM. Vegetative: 500-900 PPM. Early flower: 900-1200 PPM. Late flower: 800-1000 PPM. Flush: 0-200 PPM. Values are on the 500 scale.
What is the difference between PPM 500 and 700?
They use different conversion factors from EC. PPM 500 (TDS) multiplies EC by 500. PPM 700 (Truncheon) multiplies EC by 700. Always check which scale your meter uses.
