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Specific Gravity to Salinity

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		Temperature 	0		5	10	15	20	25	30

Salinity     Sp gravity	   	
0		0.9991		-3	-6	-5	0	8	18	32
1		1.0000		-4	-6	-5	0	8	19	32
2		1.0007		-4	-6	-5	0	8	19	32
3		1.0015		-5	-7	-5	0	8	19	32
4		1.0022		-5	-7	-5	0	8	19	33
5		1.0030		-6	-7	-5	0	8	19	33
6		1.0038		-8	-7	-5	0	8	19	33
7		1.0045		-8	-8	-6	0	8	20	33
8		1.0053		-8	-8	-6	0	9	20	34
9		1.0061		-8	-8	-6	0	9	20	34
10		1.0068		-8	-8	-6	0	9	20	34
11		1.0076		-9	-8	-6	0	9	20	34
12		1.0084		-9	-9	-6	0	9	20	35
13		1.0091		-9	-9	-6	0	9	21	35
14		1.0099		-9	-9	-6	0	9	21	35
15		1.0107		-10	-9	-6	0	9	21	36
16		1.0114		-10	-10	-7	0	9	21	36
17		1.0122		-10	-10	-7	0	9	21	36
18		1.0130		-11	-10	-7	0	10	22	36
19		1.0137		-11	-10	-7	0	10	22	36
20		1.0145		-11	-11	-7	0	10	22	36
21		1.0153		-11	-11	-7	0	10	22	37
22		1.0160		-12	-11	-7	0	10	22	37
23		1.0168		-12	-12	-7	0	10	22	37
24		1.0175		-12	-12	-7	0	10	22	37
25		1.0183		-12	-12	-8	0	10	23	38
26		1.0191		-12	-12	-8	0	10	23	38
27		1.0198		-12	-12	-8	0	10	23	38
28		1.0206		-13	-13	-8	0	10	23	38
29		1.0214		-13	-13	-8	0	10	23	38
30		1.0221		-13	-13	-8	0	11	23	39
31		1.0229		-13	-14	-8	0	11	24	39
32		1.0237		-13	-14	-8	0	11	24	39
33		1.0244		-14	-14	-8	0	11	24	39
34		1.0252		-14	-15	-8	0	11	24	39
35		1.0260		-14	-15	-8	0	11	24	40
36		1.0268		-14	-15	-8	0	11	24	40
37		1.0275		-14	-15	-9	0	11	24	40
38		1.0283		-15	-16	-9	0	11	25	40
39		1.0291		-15	-16	-9	0	11	25	41
40		1.0298		-15	-16	-9	0	11	25	41

The above table present the specific gravity readings corresponding to salinity in ppt as measured at a temperature of 15 degrees centigrade. If gravity measurements are measured at temperatures other than 15 degrees centigrade with Dryden hydrometers then a correction factor to the readings is applied. For example, if reading is 1.0268 at 10 degrees C, 0.0008 is subtracted to give 1.0260, thus the salinity is 35ppt.

Conductivity of Seawater against salinity