| Approximate salinity, in parts per thousand, for the hydrometer reading at the indicated temperature.
Courtesy of Ron Shimek, reproduced with permission. |
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|---|---|---|---|---|---|---|---|---|---|
| Temperature | Specific Gravity | ||||||||
| Fahrenheit | Celsius | 1.020 | 1.021 | 1.022 | 1.023 | 1.024 | 1.025 | 1.026 | 1.027 |
| 74.0 | 23.3 | 28.0 | 29.3 | 30.6 | 31.9 | 33.3 | 34.6 | 35.9 | 37.2 |
| 75.0 | 23.9 | 28.2 | 29.5 | 30.8 | 32.1 | 33.5 | 34.8 | 36.1 | 37.4 |
| 76.0 | 24.4 | 28.4 | 29.7 | 31.0 | 32.3 | 33.7 | 35.0 | 36.3 | 37.6 |
| 77.0 | 25.0 | 28.6 | 29.9 | 31.2 | 32.5 | 33.9 | 35.2 | 36.5 | 37.8 |
| 78.0 | 25.6 | 28.8 | 30.1 | 31.4 | 32.7 | 34.1 | 35.4 | 36.7 | 38.0 |
| 79.0 | 26.1 | 29.0 | 30.3 | 31.6 | 32.9 | 34.3 | 35.6 | 36.9 | 38.2 |
| 80.0 | 26.7 | 29.2 | 30.5 | 31.8 | 33.2 | 34.5 | 35.8 | 37.1 | 38.5 |
| 81.0 | 27.2 | 29.4 | 30.7 | 32.0 | 33.4 | 34.7 | 36.0 | 37.4 | 38.7 |
| 82.0 | 27.8 | 29.6 | 30.9 | 32.3 | 33.6 | 34.9 | 36.3 | 37.6 | 38.9 |
| 83.0 | 28.3 | 29.8 | 31.2 | 32.5 | 33.8 | 35.2 | 36.5 | 37.8 | 39.2 |
| 84.0 | 28.9 | 30.1 | 31.4 | 32.7 | 34.1 | 35.4 | 36.7 | 38.1 | 39.4 |
| 85.0 | 29.4 | 30.3 | 31.6 | 33.0 | 34.3 | 35.6 | 36.9 | 38.3 | 39.6 |
| 86.0 | 30.0 | 30.5 | 31.8 | 33.2 | 34.5 | 35.8 | 37.2 | 38.5 | 39.8 |
| 87.0 | 30.6 | 30.8 | 32.1 | 33.4 | 34.8 | 36.1 | 37.4 | 38.8 | 40.1 |