Oceanlife Water Salinity Converter

This software allows you to convert basic marine water data between different units of measurement. The data is calculated at the surface.

• The direct calculation from Salinity (‰ - ppt) to Density (g/l or kg/m3) / Specific Gravity is based on the equation adopted by UNESCO - The One Atmosphere International Equation of the State of Seawater (Millero and Poisson, 1981).
• The inverse calculation, from Specific Density / Gravity to Salinity, is performed by the solution for iterative methods of the reverse equation of Millero and Poisson.
• The calculation from Conductivity to Salinity / Density / Gravity Specification is performed according to the complex polynomial equation adopted by UNESCO/ICES/SCOR/IAPSO. In this case, the values are reliable for the resulting salinity between 2 and 42 and a temperature between -2 °C and 35 °C.
• The Conductivity calculation is performed through the solution for iterative methods of the reverse equation adopted by UNESCO/ICES/SCOR/IAPSO.
• Salinity values are expressed in "Practical Salinity" (?)
  

Enter the data to be converted: PSU (g/kg - ppt - ‰) (Example: 35) Specific Gravity (SG) (Example: 1.026) Density (g/l) (Example: 1023) Conductivity (mS/cm) (Example: 53)
Temperature of sea water: °C °F
Reference pure water temperature: °C °F (usually it is equal to the temperature of the sea water)



Salinity: PSU (g/kg - ppt - ‰)
Density: g/l (value read on the densimeter) (?)
Specific gravity (SG) (or relative density): (value read on the refractometer) (?)
Conductivity: mS/cm (value read on the conductivity meter)

Use of this conversion utility is free but if you want support our work, make a donation and help us continue our research work:

References:

1. Unesco – IES-80 - Algorithms for computation of fundamental properties of seawater – 1983
2. Equation of state of Seawater
3. Density and the Equation of State
4. Seawater Density (salinity and temperature effects)
5. Density of Seawater
6. A global algorithm for estimating Absolute Salinity
7. Practical Salinity Scale – 1978