Phosphate PPM Calculator
Calculate phosphate concentration (PO₄³⁻) in ppm from mass and water volume — ideal for aquariums, ponds, and drinking water testing.
Enter water volume & phosphate mass
Formula: PPM = (milligrams of PO₄³⁻) ÷ (liters of water)
Result
General Guidance
- 0–0.5 ppm: Good for aquariums. Low algae risk.
- 0.5–1.0 ppm: Medium. Monitor regularly.
- >1.0 ppm: High — algae growth likely.
Phosphate PPM Calculator – Check PO₄ Levels in Water
This Phosphate PPM Calculator helps aquarists, pool owners, and water treatment technicians determine phosphate concentration in water. High phosphate levels commonly contribute to algae blooms in aquariums, lakes, and ponds.
Many aquarium experts suggest keeping phosphate below 0.5 ppm to limit algae growth and maintain healthy water. Some tap water also contains phosphate due to corrosion-control treatment.
How the calculator works
PPM = (mg of phosphate) ÷ (liters of water)
- Converts gallons → liters automatically
- Converts grams/µg → mg automatically
Safe ranges
- 0–0.5 ppm: Ideal for most aquariums
- 0.5–1.0 ppm: Algae more likely
- >1.0 ppm: High phosphate — corrective action recommended
For official compliance checks, rely on certified lab testing and regional regulations.