Millisiemens per centimeter to practical salinity units
Type a value in mS/cm to get it in PSU instantly.
22.94PSU
That's 1.53× as salty as brackish water, while the open ocean is 1.53× saltier. Every liter holds about 22.94 g of dissolved salt.
Convert the other way: PSU to mS/cm
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 mS/cm to PSU
Specific gravity rises with salt: SG ≈ 1 + PSU × 0.00075 at 25 °C, and conductivity runs at roughly 0.656 mS/cm per PSU for ordinary seawater.
Example: 35 mS/cm = 22.9425 PSU.
Every unit
Your salinity in every unit
Tables
mS/cm to PSU conversion table
| mS/cm | PSU |
|---|---|
| 0.5 mS/cm | 0.32775 PSU |
| 1 mS/cm | 0.6555 PSU |
| 5 mS/cm | 3.2775 PSU |
| 10 mS/cm | 6.555 PSU |
| 15 mS/cm | 9.8325 PSU |
| 20 mS/cm | 13.11 PSU |
| 25 mS/cm | 16.3875 PSU |
| 30 mS/cm | 19.665 PSU |
| 35 mS/cm | 22.9425 PSU |
| 40 mS/cm | 26.22 PSU |
| 50 mS/cm | 32.775 PSU |
PSU to mS/cm conversion table
| PSU | mS/cm |
|---|---|
| 0.5 PSU | 0.762777 mS/cm |
| 1 PSU | 1.52555 mS/cm |
| 5 PSU | 7.62777 mS/cm |
| 10 PSU | 15.2555 mS/cm |
| 15 PSU | 22.8833 mS/cm |
| 20 PSU | 30.5111 mS/cm |
| 25 PSU | 38.1388 mS/cm |
| 30 PSU | 45.7666 mS/cm |
| 35 PSU | 53.3944 mS/cm |
| 40 PSU | 61.0221 mS/cm |
| 50 PSU | 76.2777 mS/cm |
Quick answers
Quick answers
- How many PSU is 1 mS/cm?
- 1 mS/cm is 0.6555 PSU.
- How many PSU is 10 mS/cm?
- 10 mS/cm is 6.555 PSU.
- How many PSU is 35 mS/cm?
- 35 mS/cm is 22.9425 PSU.
The units
About these units
Millisiemens per centimeter (mS/cm)
Conductivity, which is what the meter actually measures.
Practical salinity units (PSU)
The oceanographic standard, measured by conductivity.
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