Calculator/Lifestyle Calculator/ Salt Water & Solution Concentration Calculator

What is this concentration calculator?

Concentration is the percentage of how much of a substance (solute) is dissolved in water (solvent), like salt water. Use it for cooking salinity, science experiments, aquariums, and diluting solutions.

Enter values

g

e.g., the weight of salt, sugar, or other substance being dissolved

g

e.g., the weight of the liquid, such as water, that dissolves the solute

Formula

Concentration (%) = solute / (solute + solvent) x 100. Solute needed = target concentration x total / 100. Dilution uses C1xV1 = C2xV2 to find the volume needed to reach the target concentration.

How to use

  1. Choose the mode you want: find concentration, find amounts needed, or dilute.
  2. Enter the values for that mode (solute/solvent weight, target concentration, current concentration, etc.).
  3. Press Calculate to instantly see the concentration or the amount needed.

Example

Dissolving 20 g of salt in 180 g of water gives a concentration of 20 / 200 x 100 = 10%. Conversely, to make 200 g of 10% salt water you need 20 g of salt and 180 g of water.

Frequently asked questions

Is concentration based on weight or volume?
The find-concentration and find-amounts modes use mass percent based on weight (g). The dilution mode uses the volume (mL) and concentration relationship (C1V1=C2V2).
Does the total solution amount include the solute?
Yes. The total solution amount is the combined weight of solute and solvent. For example, 200 g means 20 g of salt + 180 g of water.
How is dilution calculated?
Enter the current concentration and volume plus the target concentration, and C1xV1=C2xV2 gives the total volume after dilution. Add water equal to that total minus the current volume.

Related calculators

Cooking Unit Converter Cups, spoons, grams Weight Converter g, kg, oz conversion Percentage Calculator Ratio and percent calculations