Cfu/Ml Calculator

To calculate CFU/mL, multiply the colony count by the dilution factor.

CFU/mL Calculator

Basic Calculator Advanced Calculator

Enter any two values to calculate the missing variable:

Dilution Factor

Number of Colonies

CFU/mL

Enter all values to calculate the advanced CFU/mL:

Total Dilution Factor

Total Number of Colonies

Volume of Culture Plate (mL)

Advanced CFU/mL

Calculate Reset

The CFU/mL Calculator is a specialized tool which is used to determine the concentration of colony-forming units per milliliter in microbiological samples.

This calculation is vital for laboratories, researchers, and healthcare professionals assessing bacterial or fungal growth in liquids like urine, water, or nutrient solutions. By providing accurate CFU/mL values, this calculator simplifies microbial quantification, enabling precise monitoring and analysis in medical, food safety, and scientific applications.

Formula

$CFU/mL = N ∗ D$

Variable	Description
$CFU/mL$	Colony-forming units per milliliter
$N$	Number of colonies counted
$D$	Dilution factor

Solved Calculations

Example 1:
Calculate the CFU/mL for a sample with 50 colonies and a dilution factor of 10.

Step	Calculation	Result
Number of Colonies ($N$)	50
Dilution Factor ($D$)	10
Apply Formula	$CFU/mL = 50 ∗ 10$	500 CFU/mL

 

Example 2:
What is the CFU/mL if 200 colonies are counted with a dilution factor of 100?

Step	Calculation	Result
Number of Colonies ($N$)	200
Dilution Factor ($D$)	100
Apply Formula	$CFU/mL = 200 ∗ 100$	20,000 CFU/mL

What is the CFU/mL Calculator?

The CFU/mL Calculator is a fine tool for microbiologists and lab technicians. It enables them to calculate Colony Forming Units (CFU) per milliliter of a sample.

It simplifies the process of estimating the number of viable microorganisms in a liquid culture, ensuring precise data for research, diagnostics, and quality control. By using input values like dilution factors and colony counts, this calculator eliminates the potential for manual errors.

CFU/mL is a standard unit used to express microbial density in a sample. This calculator proves invaluable in determining microbial loads in applications like food safety, medical diagnostics, and water testing.

For instance, calculating CFU/mL helps identify contamination levels in clinical urine samples or measure bacterial growth in laboratory experiments.

By entering values such as dilution factors, plated sample volume, and colony count, users can instantly obtain the CFU/mL value. Advanced versions of the calculator even accommodate serial dilution calculations, making it versatile for various microbiological contexts.

Final Words:

In summary, the CFU/mL Calculator is a reliable and efficient tool for microbial density calculations. Its accuracy and user-friendliness streamline laboratory workflows, making it indispensable for scientific research and industrial applications.