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Microbiology Calculators — Biology

Culture and assay arithmetic: colony forming units per millilitre, bacterial growth rate and culture time, cell suspension concentration, and antibiotic dilution series. CFU/mL depends on the dilution factor you actually plated, so record it before you count.

All Microbiology Calculators

About Microbiology Calculators

Culture and assay arithmetic: colony forming units per millilitre, bacterial growth rate and culture time, cell suspension concentration, and antibiotic dilution series. CFU/mL depends on the dilution factor you actually plated, so record it before you count.

Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common microbiology scenarios. All results are computed in your browser — no data is sent to any server.

What You Can Calculate

This section includes 13 tools: Antibiotic Dilution Calculator, Bacterial Culture Time Calculator, Bacterial Growth Rate Calculator, Cell Suspension Concentration Calculator, CFU Calculator: Colony Forming Units per mL, Colony Forming Units Per mL Calculator, Enzyme Activity Calculator, Log Reduction Calculator, and 5 more. Each calculator is free to use with no signup required.