How to convert Phosphate to Phosphorus?

Hanna Instruments Saltwater Aquarium Ultra Low Range Phosphorus Colorimeter - Checker® HC - Hl736  parts-per-billion (ppb).

Conversion to parts-per-million (ppm) Phosphate

Multiply ppb phosphorus by 3.066 then divide by 1000 to equal ppm phosphate

Download Phosphorus to Phosphate (Conversion Table)