Convert flow rate units — m³/s, L/s, L/min, ft³/s, gallon/min and more.
| Unit | Name | Value |
|---|---|---|
| m³/s | Cubic Meter/Second | 0.000278 |
| m³/min | Cubic Meter/Minute | 0.016679666 |
| L/s | Liter/Second | 0.278 |
| L/min | Liter/Minute | 16.679666 |
| ft³/s | Cubic Foot/Second | 0.0098174242 |
| ft³/min | Cubic Foot/Minute | 0.58898305 |
| gal/min | Gallon/Minute (US) | 4.4064036 |
| gal/h | Gallon/Hour (US) | 264.38421 |
Formula: GPM = m³/h × 4.403
Multiply any m³/h value by 4.403 to get GPM.
Reverse: m³/h = GPM × 0.2271
Common flow rate values — factor: 1 m³/h = 4.403 GPM
| m³/h (m³/h) | GPM (GPM) | Context |
|---|---|---|
| 0.001 m³/h | 0.004403 GPM | Very small |
| 0.01 m³/h | 0.04403 GPM | 1 L/min |
| 0.1 m³/h | 0.4403 GPM | 100 L/min |
| 1 m³/h | 4.403 GPM | ~0.28 L/s |
| 10 m³/h | 44.03 GPM | Small pump |
| 100 m³/h | 440.3 GPM | Industrial pump |
| 500 m³/h | 2201 GPM | Large HVAC |
| 1000 m³/h | 4403 GPM | Large system |
| 5000 m³/h | 2.201e+04 GPM | Large plant |
| 1e+04 m³/h | 4.403e+04 GPM | Municipal supply |
| 3.6e+04 m³/h | 1.585e+05 GPM | 10 m³/s |
| 1e+05 m³/h | 4.403e+05 GPM | River |
| 1e+06 m³/h | 4.403e+06 GPM | Large river |
| 1e+07 m³/h | 4.403e+07 GPM | Very large |
| 1.000e+09 m³/h | 4.403e+09 GPM | Amazon |
1 m³/h = 4.403 GPM.
m³/s × 1000 = L/s × 60 = L/min. Use this chain for quick conversions.
Multiply result by 0.2271 to recover the original m³/h value.
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.
Cubic meters per hour (m³/h) is the standard flow unit in European industrial and HVAC specifications, water treatment, and utility metering. It is the most practical scale for many industrial processes.
Water meters in Europe display consumption in m³, and flow rates in municipal water systems are specified in m³/h. A typical home consumes 1–5 m³/h peak demand; a large industrial facility might use 1,000–10,000 m³/h.
Interesting fact: Global freshwater withdrawal for agriculture, industry, and municipal use is approximately 4,600 km³/year — about 524,000 m³/h per billion people — making water flow measurement one of the most economically important metrological applications.
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.
Converting m³/h to GPM 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 m³/h = 44.03 GPM. Reverse: 1 GPM = 0.2271 m³/h. Factor: 1 m³/h = 4.403 GPM.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.