Conversion Formula
$$MGD = CFS \times 0.646317$$
Multiply the value in Cubic Foot per Second by 0.646317 to get Million Gallons per Day.
CFS to MGD Conversion Table
| Cubic Foot per Second (CFS) | Million Gallons per Day (MGD) |
|---|---|
| 0.1 | 0.0646317 |
| 0.5 | 0.323158 |
| 1 | 0.646317 |
| 2 | 1.29263 |
| 5 | 3.23158 |
| 10 | 6.46317 |
| 25 | 16.1579 |
| 50 | 32.3158 |
| 100 | 64.6317 |
| 250 | 161.579 |
| 500 | 323.158 |
| 1,000 | 646.317 |
CFS to MGD in Engineering
Flow rate conversions are critical for water resources, wastewater treatment, HVAC, and piping design. Civil engineers commonly work with GPM, CFS, and MGD, while mechanical engineers often need CFM for air handling systems.
Cubic Foot per Second: Primary US unit for open channel flow, river discharge, and stormwater design. Used by USGS and FEMA.
Million Gallons per Day: Standard US unit for water and wastewater treatment plant capacity. Essential for municipal engineering.