Convert MGD to Cumecs (MGD to m3/s)
1 million US gallons per day (MGD) = 0.04381263639 cumecs (m³/s). 1 m³/s = 22.82446532 MGD. Example: 15 MGD = 15 × 0.04381263639 = 0.6571895458 m³/s.
Also searched as million US gallons per day to m3/s, million US gallons per day in m3/s, million US gallons per day into cumecs, MGD to m3/s, MGD in cumecs, MGD into cumec, million US gallons per day to cumec, MGD to cumecs converter and how many cumecs in a million US gallons per day.
1 MGD = 0.04381263639 m³/s
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk MGD to cumec converter to paste a column from Excel.
How to Convert MGD to Cumec
- 1 MGD = 0.04381263639 m³/s
- 1 m³/s = 22.82446532 MGD
- Example: convert 15 MGD to m³/s: 15 MGD = 15 × 0.04381263639 m³/s = 0.6571895458 m³/s
Formula
m³/s = MGD × 0.04381263638889
or m³/s = MGD ÷ 22.82446532374
Derivation from SI units:
- 1 MGD = 10⁶ × 3.785411784 L per day ≈ 0.0438 m³/s.
- 1 cumec = 1 m³/s.
Both units are defined exactly, so the factor is exact. MGD definition: million US gallons per day; Cumec definition: cumec.
Worked examples
- A reading of 5 MGD converts to 0.2190631819 m³/s.
5 MGD × 0.04381263639 = 0.2190631819 m³/s - A value of 50 MGD is 2.190631819 m³/s.
50 MGD × 0.04381263639 = 2.190631819 m³/s
MGD to Cumec conversion table
| MGD | Cumecs (m³/s) |
|---|---|
| 0.5 MGD | 0.02190631819 m³/s |
| 1 MGD | 0.04381263639 m³/s |
| 2 MGD | 0.08762527278 m³/s |
| 5 MGD | 0.2190631819 m³/s |
| 10 MGD | 0.4381263639 m³/s |
| 20 MGD | 0.8762527278 m³/s |
| 50 MGD | 2.190631819 m³/s |
| 100 MGD | 4.381263639 m³/s |
| 500 MGD | 21.90631819 m³/s |
| 1000 MGD | 43.81263639 m³/s |
Where it's used
MGD are used for US treatment-plant capacity, while cumecs appear in river and flood discharge. Both measure volumetric discharge of rivers, canals and water supply, so the conversion is a fixed factor.
MGD to other water discharge units
| Conversion | 1 MGD equals |
|---|---|
| MGD to cumec | 0.04381263639 m³/s |
| MGD to cusec | 1.547228652 ft³/s |
| MGD to MLD | 3.785411784 MLD |
| MGD to litre per second | 43.81263639 L/s |
| MGD to cubic metre per day | 3785.411784 m³/day |
| MGD to MGD (imp) | 0.8326741846 MGD (imp) |
| MGD to acre-foot per day | 3.068883277 acre-ft/day |
Frequently asked questions
How many cumecs are in 1 million US gallons per day?
1 MGD = 0.04381263639 m³/s.
How do I convert million US gallons per day to cumecs?
Multiply the value in MGD by 0.04381263639, or divide it by 22.82446532. For example, 15 MGD × 0.04381263639 = 0.6571895458 m³/s.
Is the MGD to m³/s conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "gallon (U.S.)".
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units) and Table 8 (non-SI units accepted for use with the SI).
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert MGD to Cumecs (MGD to m3/s). Retrieved October 29, 2026, from https://scientificconverters.com/discharge/mgd-to-cumecs/
IEEE
Scientific Converters, "Convert MGD to Cumecs (MGD to m3/s)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/discharge/mgd-to-cumecs/