Convert UK gallons per minute to Million litres per day
Convert UK gallons per minute (gpm) to Million litres per day (ML/d) instantly and accurately.
Conversion Formula
ML/d = gpm × 0.0065463696
About UK gallons per minute
The UK (imperial) gallon per minute (gpm) equals 4.54609×10⁻³/60 ≈ 7.577×10⁻⁵ m³/s, historically used in British plumbing design, pump curves, and water-treatment plant sizing. Pre-metric UK water-industry capacity tables and pump manufacturers quoted flows in UK gal/min; legacy British Standard BS EN pump curves often show both units. 1 UK gpm ≈ 7.577×10⁻⁵ m³/s ≈ 4.546 L/min.
About Million litres per day
The million litres per day (ML/d or MLD) equals 1000/86400 ≈ 0.011574 m³/s, the standard capacity unit for water-treatment plants, sewage-treatment works, and desalination facilities in the UK, India, and much of the Commonwealth. A small town water-treatment works processes 5-20 ML/d; the Beckton Sewage Treatment Works in London treats ≈700 ML/d. 1 ML/d ≈ 0.011574 m³/s = 1 000 m³/d.
Quick Reference Table
| UK gallons per minute (gpm) | Million litres per day (ML/d) |
|---|---|
| 1 gpm | 0.00654637 ML/d |
| 2 gpm | 0.0130927 ML/d |
| 5 gpm | 0.0327318 ML/d |
| 10 gpm | 0.0654637 ML/d |
| 25 gpm | 0.163659 ML/d |
| 50 gpm | 0.327318 ML/d |
| 100 gpm | 0.654637 ML/d |