The Free On-line Aquaculture Dictionary

Hydrometer conversion to salinity
Click on the temperature range you require below:
-1 to 8oC 9  - 18oC 18.5 - 23oC 23.5 - 28oC 28.5 - 33oC

Table gives salinity in parts per thousand for temperatures  23.5 - 28oC

S.G. Temperature oC
23.5 24 24.5 25 25.5 26 26.5 27 27.5 28
0.998 0.1 0.2 0.3 0.6
0.999 0.5 0.6 0.7 0.8 1 1.2 1.4 1.5 1.8 1.9
1.000 1.8 1.9 2 2.1 2.4 2.5 2.7 2.9 3.1 3.2
1.001 2.9 3.1 3.2 3.4 3.6 3.8 4 4.2 4.4 4.5
1.002 4.4 4.6 4.8 4.9 5 5.1 5.4 5.5 5.7 5.9
1.003 5.8 5.9 6.1 6.2 6.3 6.6 6.7 6.8 7.1 7.2
1.004 7.1 7.2 7.4 7.5 7.7 7.9 8 8.3 8.4 8.5
1.005 8.4 8.5 8.7 8.9 9.1 9.2 9.3 9.6 9.7 10
1.006 9.7 9.8 10.1 10.2 10.4 10.5 10.7 10.9 11 11.3
1.007 11 11.3 11.4 11.5 11.7 11.9 12 12.2 12.4 12.6
1.008 12.4 12.6 12.7 12.8 13 13.2 13.4 13.6 13.7 13.9
1.009 13.7 13.9 14 14.1 14.4 14.5 14.7 14.9 15 15.3
1.010 15 15.2 15.3 15.6 15.7 15.8 16.1 16.2 16.5 16.6
1.011 16.3 16.5 16.7 16.9 17 17.3 17.4 17.5 17.8 17.9
1.012 17.7 17.9 18 18.2 18.3 18.6 18.7 19 19.1 19.3
1.013 19.1 19.2 19.3 19.5 19.7 19.9 20 20.3 20.4 20.6
1.014 20.4 20.5 20.6 20.9 21 21.2 21.4 21.6 21.8 22
1.015 21.7 21.8 22 22.2 22.3 22.5 22.7 22.9 23.1 23.3
1.016 23 23.3 23.4 23.5 23.6 23.9 24 24.3 24.4 24.7
1.017 24.3 24.6 24.7 24.8 25.1 25.2 25.3 25.6 25.7 26
1.018 25.6 25.9 26 26.1 26.4 26.5 26.8 26.9 27.2 27.3
1.019 27 27.2 27.3 27.6 27.7 27.8 28.1 28.2 28.5 28.6
1.020 28.3 28.5 28.6 28.9 29 29.2 29.4 29.6 29.8 30
1.021 29.6 29.8 30 30.2 30.3 30.6 30.7 30.9 31.1 31.3
1.022 30.9 31.2 31.3 31.5 31.7 31.9 32 32.2 32.5 32.6
1.023 32.2 32.5 32.6 32.8 33 33.2 33.4 33.5 33.8 33.9
1.024 33.7 33.8 33.9 34.2 34.3 34.5 34.7 35 35.1 35.4
1.025 35 35.1 35.2 35.5 35.6 35.9 36 36.3 36.4 36.7
1.026 36.3 36.4 36.7 36.8 36.9 37.2 37.3 37.6 37.7 38
1.027 37.6 37.8 38 38.1 38.4 38.5 38.8 38.9 39.1 39.3
1.028 38.9 39.1 39.3 39.4 39.7 39.8 40.1 40.2 40.5 40.7
1.029 40.2 40.5 40.6 40.8 41 41.2 41.4 41.6 41.8