Saline Solution, Brine Concentration Calculator

Calculate how much salt must be added to water to get a brine with a certain concentration. Please enter two quantities, the third quantity and the concentration will be calculated. A sodium chloride (common salt) solution can have a concentration of up to 36%, for other salts, other values apply. The given original salinity is the sodium chloride percentage of average tap water.

Example: if you dissolve 25 grams of table salt in 825 grams of water, you get a salt solution of about 3.1 percent, which is slightly less salty than most seawater.

To get a homogeneous solution, don't forget to stir well after mixing. The percentual salt content of water is generally given in percent by mass; percent by volume is unusual here. However, specifying the amount of water in grams may be unfamiliar. To simplify things, you can consider a liter of water as 1000 grams, but if you need the exact result, you have to weigh the water, just like the salt.

This table is for the solution of sodium chloride, NaCl, in water. The solution is isotonic if it has the salinity of blood plasma. An isotonic solution is used for many medical purposes.

Salt water is denser than fresh water, which is why people can hardly dive into the Dead Sea, for example. Salt water conducts electricity better and reduces heat capacity. Salt water has a lower freezing point, but a higher boiling point than fresh water. In the case of a saturated salt solution, the freezing point is around -21 degrees Celsius, the boiling point around 108 degrees Celsius. Depending on the salt content, salt waters provide habitats for different animal and plant species. Even the Dead Sea, contrary to its name, is not completely dead, but life in it is limited to microorganisms. Too much salt quickly becomes toxic for humans.