About This Calculator
This CFU (Colony Forming Unit) Calculator helps estimate the number of viable bacterial cells per milliliter of sample based on colony count, dilution factor, and plated volume.
How It Works
- Enter the number of colonies counted on the agar plate.
- Select a dilution factor or enter a custom value.
- Input the plated volume in mL.
- Click "Calculate" to get CFU/mL.
CFU/mL = Colony CountDilution Factor × Plated Volume
Frequently Asked Questions
What is CFU?
CFU stands for Colony Forming Unit, representing viable bacterial or fungal cells in a sample.
What dilution factors are supported?
Standard 10-fold dilutions from 10⁰ to 10⁻⁶, plus a custom option.
Can I use this for solid samples?
This calculator assumes liquid samples and returns results in CFU/mL.