Enter the gallons per minute and the cubic feet per second into the calculator to determine the missing variable.
Gallons Per Minute To Cubic Feet Per Second Formula
The following formula is used to convert gallons per minute (GPM) to cubic feet per second (CFS).
CFS = GPM * (0.133681 / 60)
Variables:
- CFS is the cubic feet per second
- GPM is the gallons per minute
- 0.133681 is the conversion factor from gallons to cubic feet
- 60 is the number of seconds in a minute
To convert gallons per minute to cubic feet per second, multiply the GPM by the conversion factor (0.133681) and then divide by 60.
| Gallons per Minute (US GPM) | Cubic Feet per Second (CFS) |
|---|---|
| 1 | 0.00223 |
| 2 | 0.00446 |
| 5 | 0.01114 |
| 10 | 0.02228 |
| 15 | 0.03342 |
| 20 | 0.04456 |
| 25 | 0.05570 |
| 30 | 0.06684 |
| 40 | 0.08912 |
| 50 | 0.11140 |
| 60 | 0.13368 |
| 75 | 0.16710 |
| 80 | 0.17824 |
| 100 | 0.22280 |
| 125 | 0.27850 |
| 150 | 0.33420 |
| 200 | 0.44560 |
| 250 | 0.55700 |
| 300 | 0.66840 |
| 500 | 1.11400 |
| US customary: 1 GPM ≈ 0.002228 CFS; 1 CFS ≈ 448.831 GPM. | |
What is Gallons Per Minute?
Gallons per minute (GPM) is a unit of flow rate that indicates the number of gallons of liquid that flow out of a system in one minute. It is commonly used in the United States to measure the flow rate of water in plumbing systems, irrigation systems, and other fluid transport systems.
What is Cubic Feet Per Second?
Cubic feet per second (CFS) is a unit of flow rate that indicates the volume of fluid passing a point in a system per second. It is commonly used in hydrology, river engineering, and environmental engineering to measure the flow of water in rivers, streams, and other open channels.
How to Calculate Gallons Per Minute to Cubic Feet Per Second?
The following steps outline how to calculate the conversion from gallons per minute to cubic feet per second.
- First, determine the flow rate in gallons per minute (GPM).
- Next, multiply the GPM by the conversion factor (0.133681).
- Finally, divide the result by 60 to get the flow rate in cubic feet per second (CFS).
- After inserting the values and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Gallons Per Minute (GPM) = 120
Using the formula, CFS = GPM * (0.133681 / 60), we get:
CFS = 120 * (0.133681 / 60) ≈ 0.267362