Serial Dilution Planner & CFU Calculator

Optimize Your Plating Workflow: Serial Dilution Planner & CFU Calculator

Take the guesswork out of microbial enumeration with Westlab's comprehensive Serial Dilution Planner & CFU Calculator. This dual-function tool streamlines two critical microbiology tasks, helping you save time and achieve more reliable results.

1. Serial Dilution Planner: Stop wasting plates on dilutions that are too concentrated or too dilute! Based on your estimated starting concentration range (CFU/mL) and your desired target colony count per plate (e.g., 30-300), the planner recommends the specific serial dilutions (e.g., 10⁻⁵, 10⁻⁶, 10⁻⁷) most likely to yield countable plates. It also automatically generates clear, step-by-step instructions for preparing the necessary dilution series using your specified dilution factor and diluent volume.

2. CFU Calculator: Accurately determine the concentration of viable microorganisms in your original sample. Input your colony count (including handling for "TNTC" or zero counts), the volume plated, and the dilution factor used. The calculator provides:

  • Concentration in CFU/mL (for liquid samples) or CFU/g (for solid samples, requires initial weight/volume).
  • The corresponding Log10 value, useful for reporting and analysis.
  • Clear interpretation for TNTC (> limit) or zero counts (< detection limit).
  • Warnings if your count falls outside the standard reliable range (e.g., 30-300).

Improve the efficiency and accuracy of your microbial plating experiments with this essential laboratory tool.

Serial Dilution Planner & CFU Calculator

Serial Dilution Planner & CFU Calculator

Plan serial dilutions to achieve countable plates and calculate Colony Forming Units (CFU) per mL or per gram from plate counts.

Serial Dilution Planner

Recommends which dilutions to plate to achieve a target colony count, based on your estimated starting concentration. Also generates dilution instructions.

CFU Calculator

Calculates Colony Forming Units per mL (CFU/mL) or per gram (CFU/g) in the original sample.

Solid Sample Details (Required for CFU/g)

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