Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- All percentages are by mass. Assumes mass is conserved with no reaction; not a volume-additivity model.
Example Calculation
- Lower concentration: 10 %
- Higher concentration: 40 %
- Target concentration: 25 %
- Total mixture mass: 100 g
Equal masses of 10% and 40% solutions yield a 25% mass-fraction mixture.
Frequently asked questions
How do I use this calculator?
Enter lower concentration, higher concentration, target concentration, total mixture mass. The result updates automatically. Use Reset to restore the example values.
What method does it use?
high mass=M(target−low)/(high−low); low mass=M−high mass.. All percentages are by mass. Assumes mass is conserved with no reaction; not a volume-additivity model.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.