Parts per thousand to practical salinity units
Type a value in ppt to get it in PSU instantly.
35PSU
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 ppt to PSU
To convert parts per thousand to practical salinity units, multiply by 1.
Example: 35 ppt × 1 = 35 PSU.
In the other direction, 1 PSU = 1 ppt.
Every unit
Your salinity in every unit
Tables
ppt to PSU conversion table
| ppt | PSU |
|---|---|
| 0.5 ppt | 0.5 PSU |
| 1 ppt | 1 PSU |
| 5 ppt | 5 PSU |
| 10 ppt | 10 PSU |
| 15 ppt | 15 PSU |
| 20 ppt | 20 PSU |
| 25 ppt | 25 PSU |
| 30 ppt | 30 PSU |
| 35 ppt | 35 PSU |
| 40 ppt | 40 PSU |
| 50 ppt | 50 PSU |
PSU to ppt conversion table
| PSU | ppt |
|---|---|
| 0.5 PSU | 0.5 ppt |
| 1 PSU | 1 ppt |
| 5 PSU | 5 ppt |
| 10 PSU | 10 ppt |
| 15 PSU | 15 ppt |
| 20 PSU | 20 ppt |
| 25 PSU | 25 ppt |
| 30 PSU | 30 ppt |
| 35 PSU | 35 ppt |
| 40 PSU | 40 ppt |
| 50 PSU | 50 ppt |
Quick answers
Quick answers
- How many PSU is 1 ppt?
- 1 ppt is 1 PSU.
- How many PSU is 10 ppt?
- 10 ppt is 10 PSU.
- How many PSU is 35 ppt?
- 35 ppt is 35 PSU.
The units
About these units
Parts per thousand (ppt)
Grams of salt per kilogram. Numerically the same as PSU.
Practical salinity units (PSU)
The oceanographic standard, measured by conductivity.
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