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Please use the links above to access the appropriate counter.

About This Tool

CellCounter.io was created as a dedicated personal endeavor to support laboratory scientists with a simple, browser-based solution for manual cell counting, driven by a passion for coding and practical problem-solving.

Notice: This application is a publicly available tool intended solely as a visual tallying aid to assist with manual cell counting. It is not a laboratory information system (LIS), does not function as an authoritative calculation or reporting system, and does not replace institutional SOPs, validation requirements, verification processes, or result reporting workflows. Any calculations displayed within this application are provided for informational and confirmatory purposes only. All final calculations, result verification, documentation, and reporting must be performed independently in accordance with institutional policies and formally entered into the laboratory information system. Use of this tool is at the discretion of the laboratory and must be consistent with institutional procedures and quality practices.

For comments or suggestions, feel free to use the form below.

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Developed by Dionicy Tarantino, a Medical Laboratory Scientist based in Boston, MA.