What is the 10⁴ factor?

Each large square on a standard hemocytometer has a volume of 0.1 µL (10⁻⁴ mL). Multiplying by 10⁴ scales the average count to cells per milliliter.

How many squares should I count?

Counting four or five large squares (or all 25 small squares) increases accuracy. Always average the counts.

Can I use this for yeast or bacteria?

Yes, any cell type counted with a hemocytometer can use the same formula as long as you apply the appropriate dilution factor.

Hemocytometer Cell Counting Calculator

Calculate cell concentration from hemocytometer counts. Enter cells counted, squares, and dilution to get cells/mL, cells/µL, and concentration guidance.

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Home — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/
Science — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/science

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Version: 0.1.0-draft
Last code update: 2026-01-19

0.1.0-draft · 2026-01-19

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Changelog

0.1.0-draft — 2026-01-19: Initial draft (review required).