How to convert gallons per hour to cubic feet per minute
CFM = gph × 0.002228009259Multiply the value in gallons per hour by 0.002228009259. To go the other way, multiply by 448.8311688 (or divide by 0.002228009259).
An US gallon per hour is smaller than a cubic foot per minute: it takes 448.8311688 gallons per hour to make one cubic foot per minute.
Worked examples
- 1 US gallon per hour1 gph × 0.002228009259 = 0.002228009259 CFM
- 5 gallons per hour5 gph × 0.002228009259 = 0.0111400463 CFM
- 10 gallons per hour10 gph × 0.002228009259 = 0.02228009259 CFM
- 20 gallons per hour20 gph × 0.002228009259 = 0.04456018519 CFM
- 100 gallons per hour100 gph × 0.002228009259 = 0.2228009259 CFM
Gallons per hour to cubic feet per minute conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Gallons per hour (gph) | Cubic feet per minute (CFM) |
|---|---|
| 0.1 gph | 0.00022280093 CFM |
| 0.25 gph | 0.00055700231 CFM |
| 0.5 gph | 0.0011140046 CFM |
| 1 gph | 0.0022280093 CFM |
| 2 gph | 0.0044560185 CFM |
| 3 gph | 0.0066840278 CFM |
| 4 gph | 0.008912037 CFM |
| 5 gph | 0.011140046 CFM |
| 6 gph | 0.013368056 CFM |
| 7 gph | 0.015596065 CFM |
| 8 gph | 0.017824074 CFM |
| 9 gph | 0.020052083 CFM |
| 10 gph | 0.022280093 CFM |
| Gallons per hour (gph) | Cubic feet per minute (CFM) |
|---|---|
| 12 gph | 0.026736111 CFM |
| 15 gph | 0.033420139 CFM |
| 20 gph | 0.044560185 CFM |
| 25 gph | 0.055700231 CFM |
| 30 gph | 0.066840278 CFM |
| 40 gph | 0.08912037 CFM |
| 50 gph | 0.11140046 CFM |
| 75 gph | 0.16710069 CFM |
| 100 gph | 0.22280093 CFM |
| 250 gph | 0.55700231 CFM |
| 500 gph | 1.1140046 CFM |
| 1,000 gph | 2.2280093 CFM |
About the units
US gallon per hour (gph)
The US gallon per hour (gph) is a unit of volumetric flow rate in the US customary system. One US gallon per hour equals 0.000001051503273 cubic meters per second (m³/s).
Cubic foot per minute (CFM)
The US unit for fan, blower and air-compressor flow; about 1.699 m³/h. One cubic foot per minute equals 0.0004719474432 cubic meters per second (m³/s).
Frequently asked questions
How many cubic feet per minute are in one US gallon per hour?
There are 0.002228009259 cubic feet per minute in one US gallon per hour, and this value is exact by definition.
How do I convert gallons per hour to cubic feet per minute?
Multiply the number of gallons per hour by 0.002228009259. For example, 10 gph × 0.002228009259 = 0.02228009259 CFM.
How many gallons per hour are in one cubic foot per minute?
One cubic foot per minute equals 448.8311688 gallons per hour. That is the reverse factor, 1 ÷ 0.002228009259.
What is 10 gallons per hour in cubic feet per minute?
10 gph = 0.02228009259 CFM.
Is this gph to CFM converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.
Convert gallons per hour to other units
- Gallons per hour to cubic meters per second
- Gallons per hour to cubic meters per hour
- Gallons per hour to liters per second
- Gallons per hour to liters per minute
- Gallons per hour to gallons per minute
- Gallons per hour to cubic feet per second