💧 Flow Rate Converter
Free online flow rate unit conversion — m³/s, L/min, GPM, CFM, m³/h, real-time results
Cubic meter/hr (m³/h)—
Liter/sec (L/s)—
Liter/min (L/min)—
Gallon/min (GPM)—
Cubic ft/min (CFM)—
Cubic ft/sec (ft³/s)—
Barrel/day (bbl/d)—
📊 Unit Reference Table
| Unit | Conversion | Description |
|---|---|---|
| m³/s | Base unit | SI base unit, hydro engineering |
| m³/h | 1 m³/s = 3600 m³/h | Water meter, pump rating |
| L/s | 1 m³/s = 1000 L/s | Lab, small pipe flow |
| L/min | 1 m³/s = 60,000 L/min | Household, medical devices |
| GPM | 1 m³/s = 15,850 GPM | US residential water flow |
| CFM | 1 m³/s = 2118.88 CFM | Ventilation, air compressor |
| CFS | 1 m³/s = 35.315 CFS | River flow, dam discharge |
| bbl/d | 1 m³/s = 543,439 bbl/d | Oil industry daily production |
❓ FAQ
How many L/min in 1 GPM?
1 GPM (US gallon per minute) = 3.78541 L/min. A typical US shower head flows at 2.5 GPM ≈ 9.46 L/min.
How to convert CFM to m³/h?
1 CFM = 1.699 m³/h. US ventilation uses CFM; Europe uses m³/h. For HVAC sizing, 400 CFM per ton of cooling.
What's the difference between volumetric flow and mass flow?
Volumetric flow (m³/s, GPM) measures volume per time. Mass flow (kg/s, lb/h) measures mass per time = volumetric flow × fluid density.
What is bbl/d?
Barrel per day is the standard oil production unit. 1 barrel = 42 US gallons ≈ 159 liters. Saudi Arabia produces ~10 million bbl/d.