Calculator · Statistics
Microbial count (cfu per g or mL)
Colony-forming units per gram or millilitre from duplicate plate counts and the dilution.
Result
Count
400cfu per g or mL
Mean colonies per plate
40.0
cfu/g = Mean colonies per plate ÷ Volume plated (mL) × Dilution factor
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Calculators are for learning and quick checks. Use your validated spreadsheet or LIMS for reportable results.