Calculator
Specific gravity to ppt to conductivity
Convert between specific gravity (1.020-1.030), salinity ppt (parts per thousand), and conductivity (mS/cm). Reef-safe range: 1.025-1.026 SG / 35 ppt.
Inputs
Enter values + click Calculate.
How it works
Step 1Reef target: 35 ppt / 1.026 SG @ 77°F
Step 2FOWLR / soft corals: 1.022-1.025 SG acceptable
Step 3Always calibrate refractometer with 35 ppt standard, not RO/DI