Salinity Converter
Convert salt content between common units: enter your value in ppt, ppm, percent or specific gravity and see all the equivalent readings instantly — handy for aquariums, pools and lab work.
How to use
- Type your value in any of the unit boxes, or choose from the option list.
- All the other units update live — there is no button to press.
- Change the value or switch units and the new results appear at once.
Note
Specific gravity is worked out with the approximate formula SG = 1 + 0.0007 x ppt (around 25°C, typical seawater). Seawater is usually 35 ppt. Use a refractometer for accurate measurement.
Frequently Asked Questions (FAQ)
Which units can I convert?
Parts per thousand (ppt), parts per million (ppm), percent, and specific gravity.
Does the conversion update live?
Yes. Enter a value in any unit and all the equivalent readings update automatically as you type.
How do ppt and ppm relate?
One part per thousand equals 1,000 parts per million, so 1 ppt is 1,000 ppm.
When would I use this converter?
It is handy for aquariums, swimming pools and lab work, where salt levels are usually given in ppt, ppm or specific gravity.