Solution Dilution Calculator
Calculate solution dilution with explicit inputs and a worked example.
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.
- Educational calculation using the stated ideal model. Inputs must describe the same system; not a dosing or laboratory procedure. Final volumes are used; volume additivity is not assumed.
Example Calculation
- Stock concentration: 2 mol/L
- Target concentration: 0.5 mol/L
- Final solution volume: 100 mL
To make 100 mL at 0.5 M from a 2 M stock, use 25 mL stock and bring the final volume to 100 mL.
Method references
Frequently asked questions
How do I use this calculator?
Enter stock concentration, target concentration, final solution volume. The result updates automatically. Use Reset to restore the example values.
What method does it use?
stock volume = target concentration × final volume / stock concentration. Educational calculation using the stated ideal model. Inputs must describe the same system; not a dosing or laboratory procedure. Final volumes are used; volume additivity is not assumed.
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.