Convert flow rate units — m³/s, L/s, L/min, ft³/s, gallon/min and more.
| Unit | Name | Value |
|---|---|---|
| m³/s | Cubic Meter/Second | 0.001 |
| m³/min | Cubic Meter/Minute | 0.0599988 |
| m³/h | Cubic Meter/Hour | 3.5971223 |
| L/min | Liter/Minute | 59.9988 |
| ft³/s | Cubic Foot/Second | 0.035314475 |
| ft³/min | Cubic Foot/Minute | 2.1186441 |
| gal/min | Gallon/Minute (US) | 15.850372 |
| gal/h | Gallon/Hour (US) | 951.02235 |
Formula: GPM = L/s × 15.85
Multiply any L/s value by 15.85 to get GPM.
Reverse: L/s = GPM × 0.06309
Common flow rate values — factor: 1 L/s = 15.85 GPM
| L/s (L/s) | GPM (GPM) | Context |
|---|---|---|
| 0.001 L/s | 0.01585 GPM | Drip |
| 0.01 L/s | 0.1585 GPM | Small drip |
| 0.1 L/s | 1.585 GPM | Trickle |
| 1 L/s | 15.85 GPM | Garden hose full |
| 5 L/s | 79.25 GPM | Fire hose min |
| 7 L/s | 111 GPM | Fire hose |
| 10 L/s | 158.5 GPM | Commercial pump |
| 30 L/s | 475.5 GPM | Large pump |
| 60 L/s | 951 GPM | 1 m³/min |
| 100 L/s | 1585 GPM | Large system |
| 1000 L/s | 1.585e+04 GPM | 1 m³/s |
| 1e+04 L/s | 1.585e+05 GPM | River branch |
| 1e+05 L/s | 1.585e+06 GPM | Large river |
| 2.15e+08 L/s | 3.408e+09 GPM | Amazon |
| 1e+06 L/s | 1.585e+07 GPM | Very large |
L/s × 15.85 = GPM.
1 L/s = 15.85 GPM. 0.0631 L/s = 1 GPM.
GPM × 0.0631 = L/s.
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.
Liters per second (L/s) is widely used in water supply engineering, fire protection, and irrigation where liter-scale flows are practical. One L/s = 0.001 m³/s = 60 L/min.
Fire hoses typically deliver 7–25 L/s. Municipal water distribution systems are designed for flows in L/s. Swimming pool filtration systems run at 1–10 L/s. A garden hose delivers about 0.3 L/s.
Interesting fact: The human heart pumps about 0.083 L/s (5 L/min) at rest, rising to 0.333–0.5 L/s (20–30 L/min) during intense exercise. Over a lifetime, the heart pumps approximately 200 million liters of blood.
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 L/s 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 L/s = 158.5 GPM. Reverse: 1 GPM = 0.06309 L/s. Factor: 1 L/s = 15.85 GPM.
All conversions use IEEE 754 double-precision arithmetic, accurate to at least 8 significant figures.