Free Online Colony Counter for Agar Plates and Petri Dishes

A free agar plate colony counting solution using classic image pixel analysis.

You can upload your image of an bacterial or fungal agar plate and start counting. Please note that the result of the colony counting process depends on the quality and resolution of your image. Our free online tool for counting agar colonies is optimized only for desktop usage.

You can use this colony counting software for free and also publish results in your papers/documents.

How to count your plates

1
Upload an image of your agar plate
2
Draw a circle to outline the plate and trim the edges
3
Select the colony type you wish to count
4
Click “Count Colonies”
5
Adjust the threshold and minimum/maximum colony size
6
Download your results!

Note: By uploading images, you confirm that you have read, understood, and agreed to these Terms and Conditions.

Desktop Agar Colony Counting Software

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Your Next Step – CFU Calculator Tool

With our CFU Calculator tool you can directly put your result into our calculator to avoid calculation issues by hand.

Online CFU Calculator

Automated Colony Counting for Microbiology

Are the results not as good as you expect? Try out our AI application instead!

AI-powered agar plate analysis – automated colony counting software for labs, researchers, and biotech companies
Count bacterial or fungal colonies in seconds online

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Our AI-driven agar plate analysis software helps researchers and biotech labs automate colony detection with precision and efficiency.

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