Dilution and Stock Solutions (C1V1)
Dilution by C1 × Q1 = C2 × Q2: give any three of stock strength, stock quantity, final strength and final quantity.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Stock strength
- 1000
- Stock strength unit
- ratio 1:X (enter X)
- Final strength
- 10000
- Final strength unit
- ratio 1:X (enter X)
- Final quantity
- 100
Result: Stock needed: 10 mL.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Stock strength (for a ratio 1:X, give X)
- Stock strength unit
- Stock quantity (mL, or g for % w/w)
- Final strength (for a ratio 1:X, give X)
- Final strength unit
- Final quantity (mL, or g for % w/w)
- Specific gravity of the stock (only for a % w/w stock made into a weight-in-volume product)
How this is calculated
Citation
Arithmetic identity: the amount of solute does not change on dilution, so C1 × Q1 = C2 × Q2 once both strengths are in one unit. No source beyond the definitions is needed.
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.