Convert flow rate units — m³/s, L/s, L/min, ft³/s, gallon/min and more.
| Unit | Name | Value |
|---|---|---|
| m³/s | Cubic Meter/Second | 0.00006309 |
| m³/min | Cubic Meter/Minute | 0.0037853243 |
| m³/h | Cubic Meter/Hour | 0.22694245 |
| L/s | Liter/Second | 0.06309 |
| L/min | Liter/Minute | 3.7853243 |
| ft³/s | Cubic Foot/Second | 0.0022279903 |
| ft³/min | Cubic Foot/Minute | 0.13366525 |
| gal/h | Gallon/Hour (US) | 60 |
Formula: ft³/s = GPM × 0.002228
Multiply any GPM value by 0.002228 to get ft³/s.
Reverse: GPM = ft³/s × 448.8
Common flow rate values — factor: 1 GPM = 0.002228 ft³/s
| GPM (GPM) | ft³/s (ft³/s) | Context |
|---|---|---|
| 0.01 GPM | 2.228e-05 ft³/s | Drip |
| 0.1 GPM | 0.0002228 ft³/s | Slow drip |
| 1 GPM | 0.002228 ft³/s | 1 GPM |
| 5 GPM | 0.01114 ft³/s | Residential pump |
| 10 GPM | 0.02228 ft³/s | Garden irrigation |
| 15 GPM | 0.03342 ft³/s | Home well pump |
| 100 GPM | 0.2228 ft³/s | Light commercial |
| 500 GPM | 1.114 ft³/s | Fire hydrant small |
| 1000 GPM | 2.228 ft³/s | Fire hydrant |
| 5000 GPM | 11.14 ft³/s | Large system |
| 1e+04 GPM | 22.28 ft³/s | Municipal pump |
| 5e+04 GPM | 111.4 ft³/s | Large plant |
| 1e+05 GPM | 222.8 ft³/s | Very large |
| 1e+06 GPM | 2228 ft³/s | Extreme |
| 1e+07 GPM | 2.228e+04 ft³/s | Max |
GPM ÷ 448.8 = ft³/s.
448.8 GPM = 1 ft³/s.
ft³/s × 448.8 = GPM.
Designs pumps, pipes, and water distribution systems with flow rates in m³/s, L/s, and GPM.
Specifies air handling units and ductwork in CFM (ft³/min) and m³/h for North American and European projects.
Monitors and controls treatment processes with flow rates in m³/h, L/s, and MGD.
Designs sprinkler systems with required flows in GPM and L/min per NFPA standards.
Measures river and groundwater flows in m³/s (m) and ft³/s (cfs) for flood modeling and water resource planning.
Configures ventilators and oxygen delivery systems with flow rates specified in L/min.
Gallons per minute (GPM) is the standard flow unit for pumps, plumbing, fire suppression, and irrigation systems in the United States. One US GPM = 6.309 × 10⁻⁵ m³/s = 3.785 L/min.
US pump specifications universally use GPM: a residential well pump delivers 5–20 GPM; a fire suppression sprinkler system requires 7–26 GPM per head; a municipal fire hydrant delivers 500–1,500 GPM. Fuel transfer pumps at gas stations operate at 10–15 GPM.
Interesting fact: The US uses about 345 billion gallons of freshwater per day — approximately 240 million GPM. Of this, about 41% goes to thermoelectric power plant cooling, 37% to irrigation, and 13% to public water supplies.
Cubic feet per second (ft³/s), also called cusecs, is the standard volumetric flow unit for rivers and streams in the United States. One ft³/s = 0.028317 m³/s ≈ 28.32 L/s.
US Geological Survey (USGS) stream gauges report flow in ft³/s (cfs). Irrigation water rights, hydropower licensing, and environmental flow requirements in the US are expressed in cfs. The Colorado River at Hoover Dam averages about 7,500 cfs.
Interesting fact: During Hurricane Harvey (2017), some Houston streams exceeded 400,000 cfs — more than 10 times the normal peak flow. The USGS maintains over 8,000 stream gauges across the US, all reporting in cfs.
Converting GPM to ft³/s is essential across hydraulic engineering, HVAC, water treatment, fire protection, and medicine. SI units (m³/s, L/s) are standard in science; European engineering uses m³/h; US systems use GPM and CFM; medical applications use L/min.
Quick reference: 10 GPM = 0.02228 ft³/s. Reverse: 1 ft³/s = 448.8 GPM. Factor: 1 GPM = 0.002228 ft³/s.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.