Convert US gallons per day to Litres per hour
Convert US gallons per day (gpd) to Litres per hour (L/h) instantly and accurately.
Conversion Formula
L/h = gpd × 0.157725491
About US gallons per day
The US gallon per day (gpd) equals 3.785411784×10⁻³/86400 ≈ 4.381×10⁻⁸ m³/s, the standard unit in US water-utility regulation and residential water-well pump sizing. The US national average residential water use is about 80-100 gpd per person; a reverse-osmosis membrane module is rated in gpd (50-100 gpd for domestic units). 1 US gpd ≈ 4.381×10⁻⁸ m³/s.
About Litres per hour
The litre per hour (L/h) equals 10⁻³/3600 ≈ 2.778×10⁻⁷ m³/s, widely used in automotive fuel consumption (L/h), irrigation drip systems, and small pump specifications. A fuel cell vehicle running on hydrogen consumes ±2 L/h of liquid equivalent; a domestic water softener regeneration cycle uses 40-100 L/h of brine. 1 L/h ≈ 2.778×10⁻⁷ m³/s ≈ 0.2642 US gal/h.
Quick Reference Table
| US gallons per day (gpd) | Litres per hour (L/h) |
|---|---|
| 1 gpd | 0.157725 L/h |
| 2 gpd | 0.315451 L/h |
| 5 gpd | 0.788627 L/h |
| 10 gpd | 1.57725 L/h |
| 25 gpd | 3.94314 L/h |
| 50 gpd | 7.88627 L/h |
| 100 gpd | 15.7725 L/h |