Percentage Concentration Calculator (w/w, w/v, v/v)
Handles the three common percentage labels. Choose what to find; the unused field is ignored.
Answer
—
Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Percentage — %
Solute —
Type —
Reading this —
The formula
% = solute ÷ total × 100
w/w uses grams over grams, w/v grams over millilitres, and v/v millilitres over millilitres.
What to watch out for
A label that only says “%” usually means w/w for solids in solids, w/v for solids in liquids, and v/v for liquids in liquids.
Frequently Asked Questions
What does 5% w/v mean?
5 g of solute in every 100 mL of finished solution.
How much solute makes 250 mL of a 2% w/v solution?
5 g, made up to 250 mL.