Koi Pond Salinity Calculator
Pond Volume Calculator (Salinity Test)
Estimate pond gallons using salt added + salinity change. Enter salinity in ppt (NOT %).
Salinity Reference (ppt vs %)
Conversion: 1.0 ppt = 0.10%. If your meter reads 0.30%, that equals 3.0 ppt.
| ppt | % |
|---|---|
| 0.3 | 0.03% |
| 0.5 | 0.05% |
| 1.0 | 0.10% |
| 2.0 | 0.20% |
| 3.0 | 0.30% |
| 5.0 | 0.50% |
Tip: If someone types 0.30 but they meant 0.30%, the correct ppt entry would be 3.0.
Enter values and click “Calculate Pond Volume”.
Notes: This assumes salt fully dissolves, the pond is well-mixed, and there are no major water changes between readings.