AI counts used: 0/3
AI counts can miss colonies. Double check results.
Step 1
Step 2
Step 3
Step 4
How this web tool fits
Use the website for fast, no-login colony counting from agar plates, petri dishes, and similar CFU-style images. Upload a plate photo, run AI detection, then correct boxes before recording your final count.
For protocol-integrated workflows (timers, notes, saved projects, and more tools), continue in the Lab Laps mobile app.
Use this free online colony counter to estimate CFU counts from an agar plate or petri dish image in seconds. The tool detects bacterial colonies with automated counting so you can review boxes, adjust detections, and keep a clear final count.
This colony counter is useful for microbiology labs, researchers, food safety testing teams, and students who need quick CFU-style plate estimates. It helps standardize bacterial colony counting from agar plate and petri dish images while keeping manual review in the workflow.
Yes. The web colony counter is free and does not require a login, with up to 3 AI counts per visitor. After that, you can continue in the Lab Laps mobile app for more counting.
Use a sharp, top-down photo of an agar plate or petri dish with even lighting and clear contrast between bacterial colonies and the background. Cropping close to the plate usually improves bacteria counting results.
Yes. The tool is built for bacterial colony counting and CFU-style plate counts from images. Treat the number as AI-assisted until you have reviewed the colony boxes manually.
Yes. After counting, you can add, remove, or draw boxes to correct the overlay. Use undo/redo as you review, and toggle boxes on/off to compare against the raw image.
Confidence is the AI model score for how likely a detected box is a real colony. The confidence slider filters detections so you can choose a stricter or more permissive view before manual review.
Yes. Export downloads a PNG of your plate image with the current visible boxes overlaid, which is useful for recordkeeping and sharing a reviewed count.
Treat the result as an AI-assisted count, not an unchecked final record. Review the boxes manually, especially for crowded plates, bubbles, glare, merged colonies, or contaminants.
Download Lab Laps and keep your timers, protocols, and tools together in one app.
