ORP Calculator
Calculate ORP for nutrient management.
Calculate ORP
pH of the water (0-14)
Calibration offset (default 591.6)
ORP Value
207
mV
Low - Antioxidant
What is ORP?
ORP (Oxidation-Reduction Potential) measures water's ability to oxidize or reduce contaminants.
Positive mV = Oxidizing (kills bacteria)
Negative mV = Reducing (antioxidant)
Optimal Ranges
Hydroponics
200-400 mV
Balanced nutrient uptake
Aquaculture
300-500 mV
Healthy fish water
Pool/Spa
650-750 mV
Effective sanitization
Formula
Nernst Equation:
ORP = E₀ + ΔE_T - (E_N × pH)
E₀ ≈ 591.6 mV (default)