CFM to GPM Converter
Enter the flow rate in cfm below to convert it to gpm.
Convert CFM to GPM (US)
Enter a value in cfm (CFM) to convert to gpm (us) (GPM).
Cubic Feet per Minute to US Gallons per Minute Conversion Table
Table showing various cubic feet per minute measurements converted to gpm. Click any preset value or arrow to load it into the converter.
| CFM (CFM) | GPM (US) (GPM) |
|---|---|
| 1 CFM | 7.4805195 GPM |
| 2 CFM | 14.961039 GPM |
| 2.5 CFM | 18.7012987 GPM |
| 5 CFM | 37.4025974 GPM |
| 10 CFM | 74.8051948 GPM |
| 15 CFM | 112.2077922 GPM |
| 20 CFM | 149.6103896 GPM |
| 25 CFM | 187.012987 GPM |
| 30 CFM | 224.4155844 GPM |
| 50 CFM | 374.025974 GPM |
How to Convert CFM to GPM
To convert cfm to gpm, multiply the flow rate by the following conversion ratio: 7.4805195 gpm/cubic feet per minute.
Since one cubic feet per minute is equal to 7.4805195 gpm, you can use this simple formula to convert:
The flow rate in gpm is equal to the flow rate in cfm multiplied by 7.4805195.
For example, here's how to convert 5 cfm to gpm using the formula above.
How Many GPM Are in a Cubic Feet per Minute?
There are 7.4805195 gpm in a cubic feet per minute, which is why we use this value in the formula above.
Our cubic feet per minute to us gallons per minute calculator automatically converts your flow rate measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
CFM and gpm are both units used to measure flow rate. Keep reading to learn more about each unit.
What Is a Cubic Feet per Minute?
A cubic feet per minute is a unit of flow rate equal to 28.3168466 liters per minute (L/min), the base unit for flow rate. HVAC & air compressor airflow unit (28.3168 L/min). [1]
The cubic feet per minute is classified as a US customary unit of flow rate. CFM can be abbreviated as CFM; for example, 1 cubic feet per minute can be written as 1 CFM.
When working with cfm (CFM) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, cfm (CFM) are widely used across standard flow rate applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a US Gallons per Minute?
A us gallons per minute is a unit of flow rate equal to 3.7854118 liters per minute (L/min), the base unit for flow rate. Standard US plumbing & pump flow rate (3.78541 L/min). [2]
The us gallons per minute is classified as a US customary unit of flow rate. GPM can be abbreviated as GPM; for example, 1 us gallons per minute can be written as 1 GPM.
When working with gpm (GPM) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gpm (GPM) are widely used across standard flow rate applications within US customary workflows, engineering documentation, and technical data sheets.
When converting flow rate between cfm (CFM) and gpm (GPM), keep full floating-point precision (1 CFM = 7.4805195 GPM; 1 GPM = 0.1336806 CFM) during intermediate calculations and round only the final us gallons per minute figure to match your instrument tolerance.
More Cubic Feet per Minute & US Gallons per Minute Conversions
Need to calculate in the opposite direction? Use our gpm (us) to cfm calculator to switch your starting unit immediately. You can also explore related tools such as converting gpm (us) to cfm, converting liters per minute to gpm (us), or converting cfm to liters per minute.
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Volume Divided by Time))·Flow Rate Metrology Standard — CFM (CFM) to GPM (US) (GPM)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Volume & Flow Capacity)·Unit Specifications: Cubic Feet per Minute (CFM) (CFM) & US Gallons per Minute (GPM) (GPM)
- [3]BIPM ReferenceBIPM (Coherent Volumetric Flow Units (m³/s))·Conversion Factors & Mathematical Basis (CFM to GPM)