Popular conversions
1 pairsCubic Meter per Hour ↔ Liter per Minute
m³/h ↔ L/min
Unit guides
2 unitsDetailed guide to Flow Rate
Flow rate describes how much fluid passes through a section over a given time.
Cubic meters per hour and liters per minute are practical volumetric flow units used in water, HVAC and utility systems.
- Physical quantity
- Volumetric flow rate
- SI form
- Cubic meter per second
- Common practical unit
- Cubic meter per hour
- Small-system unit
- Liter per minute
- Typical use
- Pumps, circulation loops and supply systems
Volumetric flow and operating conditions
Flow rate expresses volume per unit time, such as litres per minute or gallons per minute. It is different from mass flow rate, which also depends on density.
For gas flow, state whether the value is measured at actual or standard conditions. Temperature and pressure can change the volume substantially.
What is flow rate?
Flow rate measures the quantity of fluid transported per unit time.
It is essential for pump selection, pipe sizing and process balancing.
m³/h and L/min
Cubic meters per hour are convenient for larger systems, while liters per minute are often easier to read in smaller installations.
Both can be converted through their exact relationship to cubic meters and seconds.
How are flow units converted?
The conversion is based on the relationship between cubic meters and liters together with the relationship between hours and minutes.
One cubic meter per hour equals about 16.6667 liters per minute.
Unit comparison table
| Unit | Symbol | SI equivalent | System | Common use |
|---|---|---|---|---|
| Cubic Meter per Hour | m³/h | ≈ 0.000277778 m³/s | Metric | Water, HVAC and utility systems |
| Liter per Minute | L/min | ≈ 0.0000166667 m³/s | Metric | Pumps and small circulation systems |
Flow-rate units
| Unit | Symbol | Information |
|---|---|---|
| Cubic Meter per Hour | m³/h | View unit guide |
| Liter per Minute | L/min | View unit guide |