Mass Percent Calculator (w/w, v/v and w/v)
Choose the kind of percent concentration, then enter the amount of solute and the total amount of solution.
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Formula
- Mass percent (w/w):
solute mass ÷ solution mass × 100 - Volume percent (v/v):
solute volume ÷ solution volume × 100 - Mass by volume (w/v):
solute grams ÷ solution mL × 100(grams per 100 mL) - Parts per million:
percent × 10,000
Worked example
10 g of salt in 60 g of solution: 10 ÷ 60 × 100 = 16.67 % (166,666.67 ppm).
25 mL of ethanol in 250 mL of solution is 10 % v/v, and 5 g in 250 mL is 2 % w/v.
Frequently asked questions
What is the mass percent formula?
Mass percent = mass of solute ÷ total mass of solution × 100. Dissolving 10 g of salt to make 60 g of solution gives 10 ÷ 60 × 100 = 16.67 %.
What is volume percent?
Volume percent (v/v) is the volume of solute divided by the total volume of solution, times 100. 25 mL of ethanol in 250 mL of solution is 10 % v/v. Volumes of liquids do not always add exactly, so use the final measured volume.
What does mass by volume (w/v) mean?
It is grams of solute per 100 mL of solution. 5 g in 250 mL is 5 ÷ 250 × 100 = 2 % w/v. Unlike the other two it can go above 100 % for very dense solutions.
How do I turn a percent into ppm?
Multiply the percent by 10,000. A 2 % solution is 20,000 ppm. For w/v solutions this is mg of solute per litre.