Count colonies, get CFU/mL. Name your samples, log replicates at any dilution and plating volume, and export raw counts plus per-sample mean ± SD to Excel. Everything runs in your browser and autosaves locally — nothing is uploaded.
CFU/mL = colonies × dilution factorstep ÷ volume plated (mL). Counts outside the countable window (30–300 per plate, 3–30 per spot) are flagged but still included — tick Excl to drop a replicate from the stats, or TNTC when a plate was too numerous to count.