Dilution Factor Calculator
Choose whether to calculate the dilution factor from concentrations or from volumes, or to combine several dilution steps into one overall factor. A dilution factor of 10 (often written 1:10) means the final concentration is 1/10 of the starting concentration.
Last updated: September 26, 2026
Frequently asked questions
What does a dilution factor of 10 mean?
A dilution factor of 10, often written 1:10, means the final solution has one-tenth the concentration of the original - the sample was diluted 10-fold, not concentrated 10 times.
How is dilution factor different from Cell Dilution?
The Cell Dilution Calculator solves C1V1 = C2V2 for the actual stock and diluent volumes you need to prepare a target concentration. This calculator instead reports the ratio itself - the dilution factor - from concentrations, from volumes, or combined across several steps.
How is dilution factor different from Alligation?
Alligation finds the ratio needed to mix two different nonzero concentrations to land on a target in between. Dilution factor describes diluting one concentration down toward zero with a diluent, expressed as a simple ratio.
How do I combine multiple dilution steps?
Multiply the individual dilution factors together. Three consecutive 1:10 dilutions give an overall factor of 10 × 10 × 10 = 1,000, meaning the final concentration is 1/1,000 of the original.
Does this calculator tell me how to prepare a specific solution?
No. It computes the dilution-factor arithmetic from the numbers you provide. It isn't a recipe for preparing hazardous chemicals or medications, and doesn't recommend any particular concentration.
Can the final concentration be higher than the initial concentration?
Not with a simple dilution. Adding diluent can only lower concentration, so the calculator rejects a final concentration or aliquot larger than the starting value.