Convert Gallons per hour to Cubic feet per minute
Instantly convert Gallons per hour (GPH) to Cubic feet per minute (CFM) with our free online calculator.
Formula: GPH to CFM — multiply by 0.00222803
Reference Table
| Gallons per hour (GPH) | Cubic feet per minute (CFM) |
|---|---|
| 1 | 0.00222803 |
| 5 | 0.0111401 |
| 10 | 0.0222803 |
| 25 | 0.0557006 |
| 50 | 0.111401 |
| 100 | 0.222803 |
How to Convert Gallons per hour to Cubic feet per minute
Formula
To convert Gallons per hour (GPH) to Cubic feet per minute (CFM): multiply by 0.00222803
Step-by-Step
- Start with your value in Gallons per hour (GPH).
- Multiply by 0.00222803 to perform the conversion.
- The result is your value expressed in Cubic feet per minute (CFM).
Conversion Factor
1 GPH = 0.00222803 CFM
Reverse Factor
1 CFM = 448.828 GPH
Worked Example
Convert 25 Gallons per hour to Cubic feet per minute: 25 GPH = 0.0557006 CFM
About Gallon per hour (GPH)
A US flow-rate unit (US gallons per hour) used for slow, metered, or steady-state low-flow applications. Common applications: aquarium and pond circulation pumps (a typical canister filter for a 75-gallon aquarium delivers 250-350 GPH), water-feature and fountain recirculators, agricultural drip-irrigation emitters (rated 0.5-4 GPH at design pressure per ASABE EP458), residential oil-burner fuel nozzle ratings (most US oil furnaces use 0.5-2.0 GPH nozzles), commercial fuel-dispensing meters (where GPH is the throughput rating, often combined with a separate gallons-pumped-per-minute peak), and reverse-osmosis water-purification membranes (GPH membrane capacity is the marketing spec on most US residential RO systems). Marine fuel-flow meters typically report consumption in GPH, a useful figure for cruising range and fuel-burn-per-mile calculations. 1 GPH = 0.01667 GPM = 0.0631 L/min = 1.0515 × 10⁻⁶ m³/s.
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.
Quick Facts
- 1 Gallon per hour equals 0.00222803 Cubic feet per minute
- 1 Cubic foot per minute equals 448.828 Gallons per hour
- Gallon per hour is a unit of volumetric flow rate
- Cubic foot per minute is a unit of volumetric flow rate
- This conversion is commonly used in plumbing, HVAC systems, and chemical process engineering
- The Gallon per hour belongs to the imperial system
Common Gallon per hour to Cubic foot per minute Conversions
| Gallons per hour (GPH) | Cubic feet per minute (CFM) |
|---|---|
| 0.01 | 0.0000222803 |
| 0.1 | 0.000222803 |
| 0.25 | 0.000557006 |
| 0.5 | 0.00111401 |
| 1 | 0.00222803 |
| 2 | 0.00445605 |
| 3 | 0.00668408 |
| 5 | 0.0111401 |
| 10 | 0.0222803 |
| 15 | 0.0334204 |
| 20 | 0.0445605 |
| 25 | 0.0557006 |
| 50 | 0.111401 |
| 75 | 0.167102 |
| 100 | 0.222803 |
| 250 | 0.557006 |
| 500 | 1.11401 |
| 1000 | 2.22803 |
| 5000 | 11.1401 |
| 10000 | 22.2803 |
Understanding Gallons per hour
The Gallon per hour (symbol: GPH) is a unit of volumetric flow rate. A US flow-rate unit (US gallons per hour) used for slow, metered, or steady-state low-flow applications. Common applications: aquarium and pond circulation pumps (a typical canister filter for a 75-gallon aquarium delivers 250-350 GPH), water-feature and fountain recirculators, agricultural drip-irrigation emitters (rated 0.5-4 GPH at design pressure per ASABE EP458), residential oil-burner fuel nozzle ratings (most US oil furnaces use 0.5-2.0 GPH nozzles), commercial fuel-dispensing meters (where GPH is the throughput rating, often combined with a separate gallons-pumped-per-minute peak), and reverse-osmosis water-purification membranes (GPH membrane capacity is the marketing spec on most US residential RO systems). Marine fuel-flow meters typically report consumption in GPH, a useful figure for cruising range and fuel-burn-per-mile calculations. 1 GPH = 0.01667 GPM = 0.0631 L/min = 1.0515 × 10⁻⁶ m³/s.
It belongs to the imperial measurement system.
Gallons per hour are commonly used in plumbing, HVAC systems, and chemical process engineering.
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.
Why Convert Gallons per hour to Cubic feet per minute?
Converting between Gallons per hour and Cubic feet 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 Gallons per hour to Cubic feet per minute?
A US flow-rate unit (US gallons per hour) used for slow, metered, or steady-state low-flow applications. To convert Gallons per hour to Cubic feet per minute, multiply by 0.00222803. For example, 25 GPH equals 0.0557006 CFM.
How many Cubic feet per minute are in 1 Gallon per hour?
There are 0.00222803 Cubic feet per minute in 1 Gallon per hour.
How many Gallons per hour are in 1 Cubic foot per minute?
There are 448.828 Gallons per hour in 1 Cubic foot per minute.
What is the formula for Gallon per hour to Cubic foot per minute conversion?
The formula is: multiply by 0.00222803. This means 1 GPH = 0.00222803 CFM.
Is a Gallon per hour bigger than a Cubic foot per minute?
Yes. One Gallon per hour is larger than one Cubic foot per minute because 1 GPH equals 0.00222803 CFM, which is less than 1.
When do you need to convert between Gallons per hour and Cubic feet per minute?
An imperial flow-rate unit dominant in US HVAC, dust collection, and compressed-air system engineering. Gallon per hour and Cubic foot 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.