Convert MGD (imperial) to Cumecs (MGD imp to m3/s)

Formula

m³/s = MGD (imp) × 0.05261678240741

or m³/s = MGD (imp) ÷ 19.00534305304

Derivation from SI units:

• 1 MGD (imp) = 10⁶ × 4.54609 L per day ≈ 0.0526 m³/s.
• 1 cumec = 1 m³/s.

Both units are defined exactly, so the factor is exact. MGD (imperial) definition: million imperial gallons per day; Cumec definition: cumec.

Worked examples

1. A reading of 5 MGD (imp) converts to 0.263083912 m³/s.
   5 MGD (imp) × 0.05261678241 = 0.263083912 m³/s
2. A value of 50 MGD (imp) is 2.63083912 m³/s.
   50 MGD (imp) × 0.05261678241 = 2.63083912 m³/s

Where it's used

MGD (imperial) are used for older Indian municipal records, 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 (imperial) to other water discharge units

Frequently asked questions

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 [Canadian and U.K. (Imperial)]".
• 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: 2026-10-15. Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.