Flow Rate Converter
Enter a value below to convert between metric, imperial, and standard flow rate units.
Convert Flow Rate
Enter a value and select the units to convert between liters per minute, gpm (us), and cfm.
You can change the units using the dropdowns above or click on a unit button.
Common Flow Rate Reference Points
Here are some common flow rate values in Liters per Minute (L/min), US Gallons per Minute (GPM) (GPM), and Cubic Feet per Minute (CFM) (CFM). Click any preset value or arrow to load it into the converter.
| Description | Liters per Minute (L/min) | US Gallons per Minute (GPM) (GPM) | Cubic Feet per Minute (CFM) (CFM) |
|---|---|---|---|
| Bathroom faucet aerator (5 L/min) | 5 | 1.32086 | 0.17657 |
| Standard showerhead (~9.5 L/min / 2.5 GPM) | 9.46353 | 2.5 | 0.3342 |
| Garden hose flow (20 L/min) | 20 | 5.28344 | 0.70629 |
| 1 Cubic Foot per Minute (~28.32 L/min) | 28.31685 | 7.48052 | 1 |
| Residential pump (100 L/min) | 100 | 26.41721 | 3.53147 |
Flow Rate Conversion Formulas
Use the following formulas to convert between liters per minute, gpm (us), and cfm.
1 US Gallon per Minute (GPM) equals 3.78541 L/min, and 1 Cubic Foot per Minute (CFM) equals 28.31685 L/min.
More Liters per Minute & US Gallons per Minute Conversions
Convert from Liters per Minute
Frequently Asked Questions
All Flow Rate Conversion Calculators (8)
Select any dedicated flow rate pair below for worked examples and printable tables
Category Conversion Matrix
Simultaneous comparison of 13 units in this category
Flow Rate Unit Definitions & Symbols
Liters per Minute (L/min)
METRICVolumetric flow of 1 liter per minute.
Liters per Second (L/s)
METRICEqual to 60 L/min.
Liters per Hour (L/h)
METRICEqual to 1/60 L/min.
Milliliters per Minute (mL/min)
METRICEqual to 0.001 L/min (1 cm³/min).
Milliliters per Hour (mL/h)
METRICMedical IV infusion pump rate unit.
Cubic Meters per Second (m³/s)
SICoherent SI flow unit equal to 1,000 L/s (60,000 L/min).
Cubic Meters per Hour (m³/h)
METRICEqual to 16.6667 L/min.
US Gallons per Minute (GPM) (GPM)
US CUSTOMARYStandard US plumbing & pump flow rate (3.78541 L/min).
US Gallons per Hour (GPH) (GPH)
US CUSTOMARYEqual to 1/60 GPM (0.06309 L/min).
US Gallons per Day (GPD) (GPD)
US CUSTOMARYWater treatment flow unit.
Cubic Feet per Second (cfs) (ft³/s)
US CUSTOMARYRiver hydrology flow unit equal to 28.3168 L/s.
Cubic Feet per Minute (CFM) (CFM)
US CUSTOMARYHVAC & air compressor airflow unit (28.3168 L/min).
Cubic Feet per Hour (CFH / SCFH) (CFH)
US CUSTOMARYGas meter flow unit (0.47195 L/min).
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Volume Divided by Time))·Flow Rate Metrology Standards — Liters per Minute (L/min), Liters per Second (L/s) & Liters per Hour (L/h)
- [2]NIST OWM ReferenceNIST OWM (SI Units — Volume & Flow Capacity)·International Reference Specification for Volumetric Flow Rate
- [3]BIPM TablesBIPM (Coherent Volumetric Flow Units (m³/s))·Official Flow Rate Conversion Factors & Rounding Rules