Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Choose one measured constituent such as BOD or COD; not a treatment design or discharge compliance assessment.
Example Calculation
- Daily wastewater flow: 100 m³/day
- Influent concentration: 200 mg/L
- Reactor volume: 50 m³
Daily wastewater flow = 100; Influent concentration = 200; Reactor volume = 50. Primary result: 20.
Frequently asked questions
How do I use this calculator?
Enter daily wastewater flow, influent concentration, reactor volume. The result updates automatically. Use Reset to restore the example values.
What method does it use?
mass load=flow ×concentration/1000 kg/day; volumetric load=mass/volume.. Choose one measured constituent such as BOD or COD; not a treatment design or discharge compliance assessment.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.