researchtools
Biology & Chemistry

Serial Dilution Calculator

Plan a stepwise dilution series and reagent volumes.

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RESULT

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ABOUT THIS TOOL

Calculate the concentrations and mixing volumes for a constant-factor serial dilution series, with a step-by-step preparation table.

Important: Each transfer reduces the volume remaining in the previous tube. The specified preparation volume is the volume immediately after mixing, not the volume retained in every tube after transfers. Mix thoroughly, and consider pipetting accuracy.

How it works

Method: At each step, concentration Cₙ = C₀/Fⁿ, where F is the dilution factor. To prepare V µL at each step: transfer V/F µL from the previous dilution and add V × (1 − 1/F) µL diluent.

Example: For a 2-fold dilution series starting at 10 mM, concentrations at steps 1–3 are 5, 2.5 and 1.25 mM. To prepare 200 µL at each step, mix 100 µL from the previous tube with 100 µL diluent.

Cite this toolCopy · BibTeX · RIS

If you use this calculator in research, you may cite the software and report the statistical methods separately. Citation is appreciated, not required. No DOI is registered for this release.

Biotech Insight Solutions. ResearchTools: Serial Dilution Calculator (version 1.4) [Software]. 2026. Available at: https://tools.biotech-insight.com/tools/serial-dilution-calculator/

A citation cannot replace a methods description or independent verification. Report version, statistical assumptions and data-processing choices.

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