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  18.5 - 23oC

S.G. Temperature oC
18.5 19 19.5 20 20.5 21 21.5 22 22.5 23
0.999 0 0.1 0.2 0.3            
1.000 0.5 0.6 0.7 0.8 1 1.1 1.2 1.4 1.5 1.6
1.001 1.8 1.9 2 2.1 2.3 2.4 2.5 2.5 2.7 2.8
1.002 3.1 3.2 3.3 3.4 3.6 3.7 3.8 4 4.1 4.2
1.003 4.4 4.5 4.6 4.8 4.9 5 5.1 5.3 5.4 5.5
1.004 5.7 5.8 5.9 6.1 6.2 6.3 6.4 6.6 6.7 7
1.005 7.1 7.1 7.2 7.4 7.5 7.6 7.7 7.9 8.1 8.3
1.006 8.4 8.5 8.7 8.8 8.9 9.1 9.2 9.3 9.4 9.6
1.007 9.7 9.8 10 10.1 10.2 10.4 10.5 10.6 10.7 10.9
1.008 11 11.1 11.3 11.4 11.5 11.7 11.8 11.9 12 12.2
1.009 12.3 12.4 12.6 12.7 12.8 13 13.1 13.2 13.4 13.6
1.010 13.6 13.7 13.9 14 14.1 14.3 14.4 14.5 14.8 14.9
1.011 14.9 15 15.2 15.3 15.4 15.6 15.7 16 16.1 16.2
1.012 16.2 16.3 16.5 16.6 16.7 17 17.1 17.3 17.4 17.5
1.013 17.5 17.7 17.8 17.9 18 18.3 18.4 18.6 18.7 18.8
1.014 18.8 19 19.1 19.3 19.5 19.6 19.7 19.9 20 20.1
1.015 20.1 20.4 20.5 20.6 20.8 20.9 21 21.2 21.3 21.6
1.016 21.4 21.7 21.8 22 22.1 22.2 22.3 22.5 22.7 22.9
1.017 22.9 23 23.1 23.3 23.4 23.5 23.6 23.8 24 24.2
1.018 24.2 24.3 24.4 24.6 24.7 24.8 24.9 25.2 25.3 25.5
1.019 25.5 25.6 25.7 25.9 26 26.1 26.4 26.5 26.6 26.8
1.020 26.8 26.9 27 27.2 27.3 27.4 27.7 27.8 27.9 28.2
1.021 28.1 28.2 28.3 28.5 28.6 28.9 29 29.1 29.2 29.5
1.022 29.4 29.5 29.6 29.8 30 30.2 30.3 30.4 30.7 30.8
1.023 30.7 30.8 30.9 31.2 31.3 31.5 31.6 31.7 32 32.1
1.024 32 32.1 32.2 32.5 32.6 32.8 32.9 33.2 33.3 33.4
1.025 33.3 33.4 33.7 33.8 33.9 34.1 34.2 34.5 34.6 34.7
1.026 34.6 34.7 35 35.1 35.2 35.4 35.6 35.8 35.9 36
1.027 35.9 36.2 36.3 36.4 36.5 36.7 36.9 37.1 37.2 37.5
1.028 37.2 37.5 37.6 37.7 37.8 38.1 38.2 38.4 38.5 38.8
1.029 38.6 38.8 38.9 39 39.1 39.4 39.5 39.7 39.9 40.1
1.030 39.9 40.1 40.2 40.3 40.6 40.7 40.8 41 41.2 41.4
1.031 41.2 41.4 41.5 41.8 41.9 42 42.1 42.3 42.5