Dilution Factor Calculator Form
Example Data Table
| Scenario | Stock concentration | Target concentration | Final volume | Dilution factor | Stock volume | Diluent volume |
|---|---|---|---|---|---|---|
| Buffer preparation | 100 mg/mL | 10 mg/mL | 50 mL | 10× | 5 mL | 45 mL |
| Reagent dilution | 50 mg/mL | 5 mg/mL | 20 mL | 10× | 2 mL | 18 mL |
| Serial planning | Overall 1000× | 3 steps | 10 mL each | 10× per step | 1 mL | 9 mL |
Formula Used
Core dilution equation
C1 × V1 = C2 × V2
C1 is stock concentration, V1 is stock volume, C2 is target concentration, and V2 is final volume.
Dilution factor
DF = C1 ÷ C2 = V2 ÷ V1
The dilution factor shows how many times the starting solution is reduced.
Stock and diluent volumes
V1 = (C2 × V2) ÷ C1
Diluent volume = V2 - V1
These equations determine how much stock solution and diluent you must combine.
Serial dilution planning
Per-step factor = (Overall DF)1/n
Use this when the total dilution must be achieved across several equal steps.
How to Use This Calculator
- Choose the calculation mode that matches your laboratory task.
- Select the unit style for volume and concentration.
- Enter known values such as stock concentration, target concentration, and final volume.
- Set decimal precision for cleaner reporting or documentation.
- Press Calculate Dilution to show the result under the header.
- Review the output cards, calculation steps, and graph.
- Use the CSV or PDF buttons to export your result summary.
- For serial work, inspect the generated step table before preparing solutions.
Frequently Asked Questions
1. What is a dilution factor?
It is the ratio showing how much a solution is reduced. A 10× dilution means one part stock becomes ten parts total solution after adding diluent.
2. Can I use any concentration unit?
Yes, but keep units consistent. If stock concentration uses mg/mL, the target concentration must use the same unit before calculation.
3. Why must the target concentration be lower?
Dilution lowers concentration. If your target is higher than the stock, you are concentrating a solution rather than diluting it.
4. What does the diluent volume mean?
Diluent volume is the amount of solvent or buffer added to the stock portion so the final mixture reaches the required volume and concentration.
5. When should I use serial dilution?
Use serial dilution when the overall factor is very large or when small direct transfer volumes would be impractical or inaccurate in routine lab work.
6. Does this calculator work with percentages?
Yes. Percentage strength follows the same dilution logic as concentration, provided the initial and target percentages use the same basis.
7. Why is final volume important?
Final volume determines how much total solution you will prepare. It directly affects the required stock transfer and the amount of diluent needed.
8. Can I export the calculation record?
Yes. The page includes CSV and PDF export buttons so you can save, share, or archive the generated dilution summary.