Convert US gallons per minute to Cubic metres per second
Convert US gallons per minute (gpm) to Cubic metres per second (m³/s) instantly and accurately.
Conversion Formula
m³/s = gpm × 6.309019640e-5
About US gallons per minute
The US gallon per minute (gpm) equals 3.785411784×10⁻³/60 ≈ 6.309×10⁻⁵ m³/s, the dominant volumetric flow unit in US plumbing, HVAC, and water-treatment industries. EPA showerhead standards are set at 2.5 gpm; residential water meters size at 3/4"-1" for 5-20 gpm; municipal water-distribution design uses hundreds to thousands of gpm. 1 gpm ≈ 6.309×10⁻⁵ m³/s = 3.785 L/min.
About Cubic metres per second
The cubic metre per second (m³/s) is the SI coherent unit of volumetric flow rate. It is used for large river discharges, turbine inlet flows, and major pipeline capacities. The Amazon River at its mouth averages ≈200 000 m³/s; a large hydroelectric turbine passes 400-800 m³/s; a major municipal water-main carries 5-20 m³/s. 1 m³/s = 1 000 L/s ≈ 15 850 US gal/min = 35.315 ft³/s.
Quick Reference Table
| US gallons per minute (gpm) | Cubic metres per second (m³/s) |
|---|---|
| 1 gpm | 6.309 × 10-5 m³/s |
| 2 gpm | 0.00012618 m³/s |
| 5 gpm | 0.000315451 m³/s |
| 10 gpm | 0.000630902 m³/s |
| 25 gpm | 0.00157725 m³/s |
| 50 gpm | 0.00315451 m³/s |
| 100 gpm | 0.00630902 m³/s |