Mass percent (w/w %) tells you what percentage of a solution's mass is solute. For very dilute solutions, such as pollutants in water, concentration is given in parts per million (ppm) or parts per billion (ppb).
Enter the mass of solute and the mass of solvent. The calculator adds them to get the mass of the solution, then gives every form of the concentration.
| Mass of solute | 5 g |
| Mass of solvent | 95 g |
| Mass percent (w/w, %) | 5 |
| Mass fraction | 0.05 |
| Parts per million (ppm) | 50,000 |
| Parts per billion (ppb) | 50,000,000 |
| Mass of solution (g) | 100 |
The solution is 5% sugar by mass.
Try this example →| Mass of solute | 0 g |
| Mass of solvent | 1,000 g |
| Mass percent (w/w, %) | 0.0001 |
| Mass fraction | 1e-6 |
| Parts per million (ppm) | 1 |
| Parts per billion (ppb) | 1,000 |
| Mass of solution (g) | 1,000 |
1 mg of fluoride in 1 kg of water is 1 ppm.
Try this example →The mass of solute divided by the mass of the whole solution, times 100.
Multiply by 10,000. 0.1% = 1,000 ppm.
One part of solute per million parts of solution by mass, e.g. 1 mg per kg.
No. w/w uses the mass of solution; w/v uses its volume in mL (×100).