Convert MGD to MGD (imperial) (MGD to MGD imp)
1 million US gallons per day (MGD) = 0.8326741846 million imperial gallons per day (MGD (imp)). 1 MGD (imp) = 1.200949926 MGD. Example: 15 MGD = 15 × 0.8326741846 = 12.49011277 MGD (imp).
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1 MGD = 0.8326741846 MGD (imp)
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk MGD to MGD (imp) converter to paste a column from Excel.
How to Convert MGD to MGD (imperial)
- 1 MGD = 0.8326741846 MGD (imp)
- 1 MGD (imp) = 1.200949926 MGD
- Example: convert 15 MGD to MGD (imp): 15 MGD = 15 × 0.8326741846 MGD (imp) = 12.49011277 MGD (imp)
Formula
MGD (imp) = MGD × 0.832674184629
or MGD (imp) = MGD ÷ 1.200949925505
Derivation from SI units:
- 1 MGD = 10⁶ × 3.785411784 L per day ≈ 0.0438 m³/s.
- 1 MGD (imp) = 10⁶ × 4.54609 L per day ≈ 0.0526 m³/s.
- 1 MGD = 0.04381263638889 m³/s ÷ 0.05261678240741 m³/s per MGD (imp) = 0.832674184629 MGD (imp)
Both units are defined exactly, so the factor is exact. MGD definition: million US gallons per day; MGD (imperial) definition: million imperial gallons per day.
Worked examples
- A reading of 5 MGD converts to 4.163370923 MGD (imp).
5 MGD × 0.8326741846 = 4.163370923 MGD (imp) - A value of 50 MGD is 41.63370923 MGD (imp).
50 MGD × 0.8326741846 = 41.63370923 MGD (imp)
MGD to MGD (imperial) conversion table
| MGD | MGD (imperial) (MGD (imp)) |
|---|---|
| 0.5 MGD | 0.4163370923 MGD (imp) |
| 1 MGD | 0.8326741846 MGD (imp) |
| 2 MGD | 1.665348369 MGD (imp) |
| 5 MGD | 4.163370923 MGD (imp) |
| 10 MGD | 8.326741846 MGD (imp) |
| 20 MGD | 16.65348369 MGD (imp) |
| 50 MGD | 41.63370923 MGD (imp) |
| 100 MGD | 83.26741846 MGD (imp) |
| 500 MGD | 416.3370923 MGD (imp) |
| 1000 MGD | 832.6741846 MGD (imp) |
Where it's used
MGD are used for US treatment-plant capacity, while million imperial gallons per day appear in older Indian municipal records. 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 MGD (imp) | 0.8326741846 MGD (imp) |
| 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 acre-foot per day | 3.068883277 acre-ft/day |
Frequently asked questions
How many million imperial gallons per day are in 1 million US gallons per day?
1 MGD = 0.8326741846 MGD (imp).
How do I convert million US gallons per day to million imperial gallons per day?
Multiply the value in MGD by 0.8326741846, or divide it by 1.200949926. For example, 15 MGD × 0.8326741846 = 12.49011277 MGD (imp).
Is the MGD to MGD (imp) 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.)".
- 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 [Canadian and U.K. (Imperial)]".
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 MGD (imperial) (MGD to MGD imp). Retrieved October 29, 2026, from https://scientificconverters.com/discharge/mgd-to-mgd-imperial/
IEEE
Scientific Converters, "Convert MGD to MGD (imperial) (MGD to MGD imp)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/discharge/mgd-to-mgd-imperial/