Practical salinity units to percent
Type a value in PSU to get it in % instantly.
3.5%
That's about the same as the open ocean. Every liter holds about 35 g of dissolved salt.
What it means
How salty is that?
Specific gravity depends on temperature. Aquarium hydrometers are usually calibrated at 25 °C, and a reading taken cold will be wrong.
The math
How to convert PSU to %
To convert practical salinity units to percent, multiply by 0.1.
Example: 35 PSU × 0.1 = 3.5 %.
In the other direction, 1 % = 10 PSU.
Every unit
Your salinity in every unit
Tables
PSU to % conversion table
| PSU | % |
|---|---|
| 0.5 PSU | 0.05 % |
| 1 PSU | 0.1 % |
| 5 PSU | 0.5 % |
| 10 PSU | 1 % |
| 15 PSU | 1.5 % |
| 20 PSU | 2 % |
| 25 PSU | 2.5 % |
| 30 PSU | 3 % |
| 35 PSU | 3.5 % |
| 40 PSU | 4 % |
| 50 PSU | 5 % |
% to PSU conversion table
| % | PSU |
|---|---|
| 0.05 % | 0.5 PSU |
| 0.1 % | 1 PSU |
| 0.5 % | 5 PSU |
| 1 % | 10 PSU |
| 1.5 % | 15 PSU |
| 2 % | 20 PSU |
| 2.5 % | 25 PSU |
| 3 % | 30 PSU |
| 3.5 % | 35 PSU |
| 4 % | 40 PSU |
| 5 % | 50 PSU |
Quick answers
Quick answers
- How many % is 1 PSU?
- 1 PSU is 0.1 %.
- How many % is 10 PSU?
- 10 PSU is 1 %.
- How many % is 35 PSU?
- 35 PSU is 3.5 %.
The units
About these units
Practical salinity units (PSU)
The oceanographic standard, measured by conductivity.
Percent (%)
For brines and salt ponds.
Keep going