How to use the cell dilution calculator
Prepare the values for this calculation
Solve a dilution using C₁V₁=C₂V₂. Use the formula below to check that it answers your question. Read the input units before transferring figures from a statement, measurement or dataset.
Enter and check each input
- Stock concentration C₁: enter a value at least 1e-06. Use the unit named in the label or selected above. Do not leave this required field blank.
- Target concentration C₂: enter a value at least 0. Use the unit named in the label or selected above. Do not leave this required field blank.
- Final volume V₂: enter a value at least 0. Use the unit named in the label or selected above. Do not leave this required field blank.
The input table gives a complete example. Keep units and time periods consistent across related fields.
Calculate and resolve any input error
Choose Calculate after entering the values. Changes also update the answer after a short pause. If an error appears, follow its message, correct the field and calculate again. Reset restores the example values.
Interpret the answer
Check Required stock volume first. With the unchanged example inputs, it is 10. Interpret it using the formula and assumptions on this page.
Compare and keep a useful result
For a controlled comparison, keep every other example input unchanged and change Stock concentration C₁ from 10 to 11. The resulting Required stock volume is 9.09090909. This illustrates the equation’s response to that input, rather than a forecast of real events.
Read the chart’s axis labels and data table. A scenario curve changes one stated input while holding the others fixed; it does not add external observations. Use Download graph to save an available chart as a PNG.
Use Copy result or Download CSV to keep the answer. Share tool shares the page address without placing your input values in the URL. Recheck inputs and assumptions before using the result for a decision.
Cell Dilution Calculator formula
Required stock volume V₁=C₂V₂/C₁.
Inputs and units
| Input | Format / range | Example |
|---|---|---|
| Stock concentration C₁ | minimum 1e-06 | 10 |
| Target concentration C₂ | minimum 0 | 1 |
| Final volume V₂ | minimum 0 | 100 |
Worked example
Using the example inputs above, the required stock volume is 10.
- Required stock volume
- 10
Results and assumptions
The output uses the required stock volume convention and formula shown above. Match the entered units and source assumptions when comparing results.
Fix an input or unexpected result
Stock concentration C₁ is required. Enter stock concentration c₁ using the format and bounds in the input table. Zero and an empty field are different: use zero only if it is allowed and represents your data.
If your answer differs from the example, choose Reset and compare every field, including selected units and options. Check percentage versus decimal entry and whether values describe the same period. Round only the final displayed answer when reproducing the formula.
If a discrepancy remains, report the calculator issue with the page address, non-sensitive example inputs, actual result, expected result and a reference for your calculation.