Salinity Converter
Convert salinity values between different units for saltwater aquariums.
Result
Specific Gravity (SG) --
Parts per thousand (PPT) --
PSU --
Conductivity (mS/cm) --
Ideal reef range: 1.024-1.026 SG / 33-35 PPT
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Frequently Asked Questions
What is the difference between SG and PPT?
SG (Specific Gravity) is a relative measurement without units, while PPT (Parts Per Thousand) measures the actual salt concentration in grams per liter.
What is the ideal salinity for a reef tank?
Most corals thrive between 33-35 PPT (1.024-1.026 SG). Natural ocean salinity is about 35 PPT.
Refractometer or hydrometer?
Refractometers are more accurate. Swing-arm hydrometers can have errors of up to 0.003 SG. Always calibrate with a reference solution.
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