BOD / COD Calculator

BOD = (DO_initial − DO_final) × dilution factor; COD via dichromate titration.

Last reviewed: February 2026How we build & verify

BOD

Initial DO (mg/L)

Final DO (mg/L)

Dilution Factor

COD (Dichromate)

Vblank (mL)

Vtitrant (mL)

Normality

Sample Vol (mL)

BOD

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COD

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Frequently Asked Questions

No. Bod Cod Calculator is free and works without creating an account. Open the page and start using it.

We check Bod Cod Calculator periodically to keep it working correctly and to make small improvements based on how people actually use it. The date at the top of the page shows the last review. Found a bug or have a suggestion? There's a feedback button in the bottom-right corner.