Weight percent (% w/w) expresses the mass of solute per 100 grams of total mixture.
% w/w = (masssolute / massmixture) × 100
g per 100 g = % w/w
(numerically identical by definition)masssolute = (% w/w ÷ 100) × massmixture
masssolvent = massmixture − masssolute
Units should be consistent (grams). This tool rounds display values but keeps full precision internally for accuracy.
% w/w | g per 100 g | Batch (g) | Solute (g) | Solvent (g) |
---|---|---|---|---|
0.1000 | 0.1000 | 500.0000 | 0.5000 | 499.5000 |
1.0000 | 1.0000 | 250.0000 | 2.5000 | 247.5000 |
5.0000 | 5.0000 | 1,000.0000 | 50.0000 | 950.0000 |
10.0000 | 10.0000 | 200.0000 | 20.0000 | 180.0000 |
35.0000 | 35.0000 | 100.0000 | 35.0000 | 65.0000 |
- Client-side and server-side validation for robust results.
- Precision handling with configurable decimal places.
- CSV download for documenting calculations.
- Copy-to-clipboard for quick sharing.
1) What does % w/w mean?
It indicates grams of solute present in every 100 grams of total mixture. The figure is mass based, not volume based.
2) Is % w/w the same as g per 100 g?
Yes. Numerically % w/w equals grams of solute per 100 grams of mixture, so the conversion is one to one.
3) Can this tool plan a custom batch?
Enter the desired percentage and total batch mass to compute exact solute and solvent quantities in grams.
4) Why does the output round numbers?
Display values are rounded for readability. Internal calculations maintain full precision before rounding.
5) What if I need mg or kg?
Convert those units to grams before using the calculator, then convert the outputs back to your preferred units.
6) Does density matter for this calculator?
No. Weight percent uses mass only. If you are converting from a volume basis, you will need density to convert to grams first.