Cubic Metres per Day to MGD (imperial) (m3/day to MGD imp)

Formula

MGD (imp) = m³/day × 0.0002199692482991

or MGD (imp) = m³/day ÷ 4546.09

Derivation from SI units:

• 1 m³/day = 1/86,400 m³/s; one kilolitre per day (KLD).
• 1 MGD (imp) = 10⁶ × 4.54609 L per day ≈ 0.0526 m³/s.
• 1 m³/day = 0.00001157407407407 m³/s ÷ 0.05261678240741 m³/s per MGD (imp) = 0.0002199692482991 MGD (imp)

Both units are defined exactly, so the factor is exact. Cubic Metre per Day definition: cubic metre per day; MGD (imperial) definition: million imperial gallons per day.

Worked examples

1. A reading of 500 m³/day converts to 0.1099846241 MGD (imp).
   500 m³/day × 0.0002199692483 = 0.1099846241 MGD (imp)
2. A value of 10000 m³/day is 2.199692483 MGD (imp).
   10000 m³/day × 0.0002199692483 = 2.199692483 MGD (imp)

Where it's used

Cubic Metres per Day are used for STP and ETP capacity (KLD), 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.

Cubic Metre per Day to other water discharge units

Frequently asked questions

Sources

• 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).
• 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: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.