Convert Cubic feet per minute to Gallons per minute
Instantly convert Cubic feet per minute (CFM) to Gallons per minute (GPM) with our free online calculator.
Formula: CFM to GPM — multiply by 7.48051
Reference Table
| Cubic feet per minute (CFM) | Gallons per minute (GPM) |
|---|---|
| 1 | 7.48051 |
| 5 | 37.4026 |
| 10 | 74.8051 |
| 25 | 187.013 |
| 50 | 374.026 |
| 100 | 748.051 |
How to Convert Cubic feet per minute to Gallons per minute
Formula
To convert Cubic feet per minute (CFM) to Gallons per minute (GPM): multiply by 7.48051
Step-by-Step
- Start with your value in Cubic feet per minute (CFM).
- Multiply by 7.48051 to perform the conversion.
- The result is your value expressed in Gallons per minute (GPM).
Conversion Factor
1 CFM = 7.48051 GPM
Reverse Factor
1 GPM = 0.133681 CFM
Worked Example
Convert 25 Cubic feet per minute to Gallons per minute: 25 CFM = 187.013 GPM
About Cubic foot per minute (CFM)
An imperial flow-rate unit dominant in US HVAC, dust collection, and compressed-air system engineering. CFM is the working unit for air-handler capacity (ASHRAE 62.1, AMCA 210), residential duct sizing (Manual D ACCA design), bathroom and kitchen exhaust-fan ratings (the Home Ventilation Institute Certified Performance Ratings list each fan model's HVI-tested CFM), compressed-air-system sizing (compressor manufacturer ratings under ISO 1217 are dual-quoted as SCFM and CFM displacement), and dust-collection ducting per OSHA 29 CFR 1910 and NFPA 654. Reference values: a residential bath fan is 50-110 CFM (HVI minimum 50 CFM for code), a central-AC air handler for a 2,000 ft² US home delivers 800-1,200 CFM (1 CFM per ft² is a typical Manual J residential figure), a large industrial centrifugal compressor 5,000-20,000 SCFM. Convert CFM to m³/hr by multiplying by 1.699; to L/s by multiplying by 0.4719; to m³/s by multiplying by 4.7195 × 10⁻⁴.
About Gallon per minute (GPM)
A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3.785411784 liters per NIST SP 811) used universally in US plumbing, HVAC, fire protection, agricultural irrigation, and swimming-pool circulation. GPM is the primary US sizing unit for residential water softeners (the IAPMO Z601 test method rates ion-exchange capacity at a defined GPM), well-pump submersibles, lawn sprinkler design (the GPM at each emitter sets zone sizing), NFPA 13 fire-sprinkler systems (head-flow allocations in GPM), and pool circulation (turnover rates require X GPM × hours). Reference values: a US WaterSense-certified showerhead is ≤ 2.0 GPM, an older US showerhead is 2.5-3 GPM, a residential dishwasher is ~3-4 GPM peak, a 4-inch municipal fire hydrant delivers 500-1,500 GPM (NFPA test pressure 20 psi residual). 1 GPM = 3.7854 L/min = 0.06309 L/s. Care: US GPM ≠ Imperial GPM (a UK gallon is 4.54609 L, so 1 Imperial GPM = 1.201 US GPM).
Quick Facts
- 1 Cubic foot per minute equals 7.48051 Gallons per minute
- 1 Gallon per minute equals 0.133681 Cubic feet per minute
- Cubic foot per minute is a unit of volumetric flow rate
- Gallon per minute is a unit of volumetric flow rate
- This conversion is commonly used in plumbing, HVAC systems, and chemical process engineering
- The Cubic foot per minute belongs to the imperial system
Common Cubic foot per minute to Gallon per minute Conversions
| Cubic feet per minute (CFM) | Gallons per minute (GPM) |
|---|---|
| 0.01 | 0.0748051 |
| 0.1 | 0.748051 |
| 0.25 | 1.87013 |
| 0.5 | 3.74026 |
| 1 | 7.48051 |
| 2 | 14.961 |
| 3 | 22.4415 |
| 5 | 37.4026 |
| 10 | 74.8051 |
| 15 | 112.208 |
| 20 | 149.61 |
| 25 | 187.013 |
| 50 | 374.026 |
| 75 | 561.038 |
| 100 | 748.051 |
| 250 | 1870.13 |
| 500 | 3740.26 |
| 1000 | 7480.51 |
| 5000 | 37402.6 |
| 10000 | 74805.1 |
Understanding Cubic feet per minute
The Cubic foot per minute (symbol: CFM) is a unit of volumetric flow rate. An imperial flow-rate unit dominant in US HVAC, dust collection, and compressed-air system engineering. CFM is the working unit for air-handler capacity (ASHRAE 62.1, AMCA 210), residential duct sizing (Manual D ACCA design), bathroom and kitchen exhaust-fan ratings (the Home Ventilation Institute Certified Performance Ratings list each fan model's HVI-tested CFM), compressed-air-system sizing (compressor manufacturer ratings under ISO 1217 are dual-quoted as SCFM and CFM displacement), and dust-collection ducting per OSHA 29 CFR 1910 and NFPA 654. Reference values: a residential bath fan is 50-110 CFM (HVI minimum 50 CFM for code), a central-AC air handler for a 2,000 ft² US home delivers 800-1,200 CFM (1 CFM per ft² is a typical Manual J residential figure), a large industrial centrifugal compressor 5,000-20,000 SCFM. Convert CFM to m³/hr by multiplying by 1.699; to L/s by multiplying by 0.4719; to m³/s by multiplying by 4.7195 × 10⁻⁴.
It belongs to the imperial measurement system.
Cubic feet per minute are commonly used in plumbing, HVAC systems, and chemical process engineering.
Understanding Gallons per minute
The Gallon per minute (symbol: GPM) is a unit of volumetric flow rate. A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3.785411784 liters per NIST SP 811) used universally in US plumbing, HVAC, fire protection, agricultural irrigation, and swimming-pool circulation. GPM is the primary US sizing unit for residential water softeners (the IAPMO Z601 test method rates ion-exchange capacity at a defined GPM), well-pump submersibles, lawn sprinkler design (the GPM at each emitter sets zone sizing), NFPA 13 fire-sprinkler systems (head-flow allocations in GPM), and pool circulation (turnover rates require X GPM × hours). Reference values: a US WaterSense-certified showerhead is ≤ 2.0 GPM, an older US showerhead is 2.5-3 GPM, a residential dishwasher is ~3-4 GPM peak, a 4-inch municipal fire hydrant delivers 500-1,500 GPM (NFPA test pressure 20 psi residual). 1 GPM = 3.7854 L/min = 0.06309 L/s. Care: US GPM ≠ Imperial GPM (a UK gallon is 4.54609 L, so 1 Imperial GPM = 1.201 US GPM).
It belongs to the imperial measurement system.
Gallons per minute are commonly used in plumbing, HVAC systems, and chemical process engineering.
Why Convert Cubic feet per minute to Gallons per minute?
Converting between Cubic feet per minute and Gallons per minute is a frequent requirement for engineers, scientists, and students working with volumetric flow rate values. Different industries and regions favour different unit systems, so having a dependable conversion tool saves time and prevents errors in technical calculations. Whether you are verifying a specification sheet, cross-checking simulation results, or preparing a report for an international audience, accurate volumetric flow rate conversion is essential.
Frequently Asked Questions
How do I convert Cubic feet per minute to Gallons per minute?
An imperial flow-rate unit dominant in US HVAC, dust collection, and compressed-air system engineering. To convert Cubic feet per minute to Gallons per minute, multiply by 7.48051. For example, 25 CFM equals 187.013 GPM.
How many Gallons per minute are in 1 Cubic foot per minute?
There are 7.48051 Gallons per minute in 1 Cubic foot per minute.
How many Cubic feet per minute are in 1 Gallon per minute?
There are 0.133681 Cubic feet per minute in 1 Gallon per minute.
What is the formula for Cubic foot per minute to Gallon per minute conversion?
The formula is: multiply by 7.48051. This means 1 CFM = 7.48051 GPM.
Is a Cubic foot per minute bigger than a Gallon per minute?
No. One Cubic foot per minute is smaller than one Gallon per minute because 1 CFM equals 7.48051 GPM, which is greater than 1.
When do you need to convert between Cubic feet per minute and Gallons per minute?
A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3. Cubic foot per minute and Gallon per minute are both volumetric flow units, so conversion comes up whenever one source of information uses one unit and another uses the other — a classic cross-reference challenge in engineering, trade, travel, and everyday life.