About the Serial Dilution Calculator

Plans a dilution series, solves for the required factor, or back-calculates CFU/mL.

What it is

Three modes: a fixed-factor dilution series generator, a solve-for-factor mode that computes equal log-steps to hit a target concentration, and a CFU/mL reverse-calculation mode for microbiology plate counts.

Features

Forward planning

Per-step and cumulative dilution factor, volumes, and concentration.

Solve-for-factor

Computes the equal per-step factor to hit a target concentration.

CFU/mL mode

Back-calculates original concentration from plated colony counts.

Visual diagram

A tube-by-tube diagram shows the full dilution chain.

Ready to use it?

Free, no sign-up required.

Open the Serial Dilution Calculator