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: L/min = GPM × 3.785
Multiply any GPM value by 3.785 to get L/min.
Reverse: GPM = L/min × 0.2642
Common flow rate values — factor: 1 GPM = 3.785 L/min
| GPM (GPM) | L/min (L/min) | Context |
|---|---|---|
| 0.01 GPM | 0.03785 L/min | Drip |
| 0.1 GPM | 0.3785 L/min | Slow drip |
| 1 GPM | 3.785 L/min | 1 GPM |
| 5 GPM | 18.93 L/min | Residential pump |
| 10 GPM | 37.85 L/min | Garden irrigation |
| 15 GPM | 56.78 L/min | Home well pump |
| 100 GPM | 378.5 L/min | Light commercial |
| 500 GPM | 1893 L/min | Fire hydrant small |
| 1000 GPM | 3785 L/min | Fire hydrant |
| 5000 GPM | 1.893e+04 L/min | Large system |
| 1e+04 GPM | 3.785e+04 L/min | Municipal pump |
| 5e+04 GPM | 1.893e+05 L/min | Large plant |
| 1e+05 GPM | 3.785e+05 L/min | Very large |
| 1e+06 GPM | 3.785e+06 L/min | Extreme |
| 1e+07 GPM | 3.785e+07 L/min | Max |
1 GPM = 3.785 L/min.
m³/s × 1000 = L/s × 60 = L/min. Use this chain for quick conversions.
Multiply result by 0.2642 to recover the original GPM 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.
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.
Liters per minute (L/min) is the standard flow unit in medicine, laboratory equipment, gas regulators, and small pump specifications. It is the most practical scale for flows measured in minutes.
Medical oxygen is prescribed in L/min (1–15 L/min depending on condition). IV drip rates are controlled in mL/min (0.001–1 L/min). Laboratory peristaltic pumps are rated in L/min. Vehicle fuel consumption during testing is measured in L/min.
Interesting fact: A healthy adult kidney filters about 120 mL/min (0.12 L/min) of blood through the glomerulus — this glomerular filtration rate (GFR) is a key indicator of kidney function and decreases with age and disease.
Converting GPM to L/min 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 = 37.85 L/min. Reverse: 1 L/min = 0.2642 GPM. Factor: 1 GPM = 3.785 L/min.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.