Mass Percent: 36 g Solute in 400 g Solution
36 grams of solute dissolved in 400 grams of solution gives a mass percent of 9% (w/w).
How to use this tool
- Enter mass of solute and mass of solution in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your mass percent (w/w) and the full breakdown beneath it.
Calculate the w/w percent when 36 g of solute is present in a 400 g solution — a practical concentration for many reagents.
Frequently asked questions
- How is w/w% different from w/v%?
- w/w% uses mass of solution in the denominator; w/v% uses volume (mL). For dilute aqueous solutions (density ≈ 1 g/mL) they are approximately equal, but they diverge at high concentrations.
- Why use mass instead of volume?
- Mass is independent of temperature and pressure, making w/w% more reproducible for concentrated or non-aqueous solutions.