🦠 Microbiology Tools

Microbiology Calculators

Free online tools for microbiology students and researchers. Calculate bacterial growth, CFU counts, OD600 cell density, antibiotic concentrations, transformation efficiency, and more.

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All Microbiology Tools

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Bacterial Growth Calculator

Model exponential bacterial growth. Calculate population size, generation number, and growth curves over time.

Free Tool Growth Kinetics
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CFU Calculator

Calculate colony forming units per mL from plate counts. Accounts for dilution factor and plated volume.

Free Tool Colony Count
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OD600 Cell Density Calculator

Convert OD600 absorbance readings to cell density (cells/mL). Includes dilution correction and species presets.

Free Tool OD600
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Antibiotic Stock Solution Calculator

Calculate how to prepare antibiotic stock solutions and working concentrations for culture media.

Free Tool Antibiotics
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Transformation Efficiency Calculator

Calculate bacterial transformation efficiency (CFU/µg DNA) from plate counts and plating parameters.

Free Tool Transformation
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Plating Dilution Calculator

Determine the correct dilution factor and volume for plating to achieve countable colonies (30–300 CFU).

Free Tool Serial Dilution
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Doubling Time Calculator

Calculate bacterial doubling time and specific growth rate from two OD600 or cell count measurements.

Free Tool Growth Rate
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Growth Rate Calculator

Calculate specific growth rate (µ), lag phase, and log phase parameters from multi-point growth data.

Free Tool Kinetics
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Antibiotic MIC Calculator

Calculate minimum inhibitory concentration from broth microdilution data. Determine MIC50 and MIC90.

Free Tool MIC
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Culture Media Calculator

Scale culture media recipes (LB, M9, BHI, SOC) to any volume. Auto-calculates each component amount.

Free Tool Media Prep
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Viable Cell Count Calculator

Calculate total and viable cell counts from hemocytometer data. Includes trypan blue exclusion method.

Free Tool Cell Counting
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Contamination Guide

Identify and troubleshoot common lab contamination types. Visual guide with prevention and remediation steps.

Free Guide Reference

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