Chemical Oxygen Demand (COD) Calculator

mg/L
mg O2/L
Chemistry

Chemical Oxygen Demand (COD) Calculator is a chemistry calculator that helps you calculate chemical oxygen demand (cod) values from your input data. The formula used is: COD (mg O2/L) ≈ Organic matter concentration × 2.67 (approximate for typical wastewater). Uses standard SI and chemistry units (mol, L, g/mol, M, Pa, K) unless otherwise stated.

Formula

COD (mg O2/L) ≈ Organic matter concentration × 2.67 (approximate for typical wastewater)
  • Chemical Oxygen Demand (COD) Calculator gives you a fast estimate using your inputs and updates instantly when you change any value.
  • Formula: COD (mg O2/L) ≈ Organic matter concentration × 2.67 (approximate for typical wastewater)
  • Input definitions: • Organic matter concentration: the numeric organic matter concentration used in the calculation • Or enter oxygen requirement directly: the numeric or enter oxygen requirement directly used in the calculation
  • Manual method: write down each input, apply the formula step by step, then compare your manual result with the calculator output.
  • Uses standard SI and chemistry units (mol, L, g/mol, M, Pa, K) unless otherwise stated.
  • Based on standard stoichiometric and thermodynamic equations. Results may vary with temperature, pressure, and substance purity.
  • Cross-check results against known standards or reference tables to confirm they are physically reasonable.
  • Practical tip: test a low, medium, and high scenario to understand sensitivity before making decisions.

Example Calculation

Inputs
  • Organic matter concentration: 100 mg/L
  • Or enter oxygen requirement directly: 0 mg O2/L

Suppose you enter: Organic matter concentration = 100, Or enter oxygen requirement directly = 0. The calculator applies the formula (COD (mg O2/L) ≈ Organic matter concentration × 2.67 (approximate for typical wastewater)) and shows all output values below. Change any input field to immediately see how the result changes.

Frequently asked questions

What is the Chemical Oxygen Demand (COD)?
The Chemical Oxygen Demand (COD) Calculator is a chemistry calculator that helps you calculate chemical oxygen demand (cod) values from your input data. Uses standard SI and chemistry units (mol, L, g/mol, M, Pa, K) unless otherwise stated.
When should I use this calculator?
Use this calculator whenever you need a quick, accurate result for chemical oxygen demand (cod) values from your input data without working through the arithmetic manually.
What units should I enter?
Uses standard SI and chemistry units (mol, L, g/mol, M, Pa, K) unless otherwise stated.
How accurate are the results?
Based on standard stoichiometric and thermodynamic equations. Results may vary with temperature, pressure, and substance purity.
How do I interpret the result?
Cross-check results against known standards or reference tables to confirm they are physically reasonable.
How can I verify the calculation manually?
Use the displayed formula and work through the numbers step by step. If your manual result differs slightly, check rounding and unit conversions first.
Can I use this for planning and budgeting?
Yes. Run best-case, expected, and worst-case inputs to compare outcomes and make safer planning decisions.