Convert Cubic feet per second to Gallons per minute
Instantly convert Cubic feet per second (ft³/s) to Gallons per minute (GPM) with our free online calculator.
Formula: ft³/s to GPM — multiply by 448.83
Reference Table
| Cubic feet per second (ft³/s) | Gallons per minute (GPM) |
|---|---|
| 1 | 448.83 |
| 5 | 2244.15 |
| 10 | 4488.3 |
| 25 | 11220.8 |
| 50 | 22441.5 |
| 100 | 44883 |
How to Convert Cubic feet per second to Gallons per minute
Formula
To convert Cubic feet per second (ft³/s) to Gallons per minute (GPM): multiply by 448.83
Step-by-Step
- Start with your value in Cubic feet per second (ft³/s).
- Multiply by 448.83 to perform the conversion.
- The result is your value expressed in Gallons per minute (GPM).
Conversion Factor
1 ft³/s = 448.83 GPM
Reverse Factor
1 GPM = 0.00222801 ft³/s
Worked Example
Convert 25 Cubic feet per second to Gallons per minute: 25 ft³/s = 11220.8 GPM
About Cubic foot per second (ft³/s)
An imperial flow-rate unit used predominantly in US hydrology, river-discharge measurement, water-resource engineering, and large-scale waterworks design. Also called "cfs" or the colloquial "cusec" in US water-resources jargon. The US Geological Survey (USGS) StreamStats and the National Water Information System publish all US river streamgage data in cfs — a federal reporting standard since the 1950s. US Army Corps of Engineers flood-routing analyses, FEMA flood-insurance studies, and state water-rights records (especially in the western US under prior-appropriation doctrine) all measure discharge in cfs. Reference values: a small headwater stream might flow 5-20 cfs at base flow and 200-500 cfs during a 100-year storm; the Colorado River below Glen Canyon Dam is typically 8,000-25,000 cfs; the lower Mississippi runs 350,000-600,000 cfs depending on the season. 1 ft³/s = 7.4805 US gallons per second = 449 GPM = 28.32 L/s = 0.02832 m³/s.
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 second equals 448.83 Gallons per minute
- 1 Gallon per minute equals 0.00222801 Cubic feet per second
- Cubic foot per second 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 second belongs to the imperial system
Common Cubic foot per second to Gallon per minute Conversions
| Cubic feet per second (ft³/s) | Gallons per minute (GPM) |
|---|---|
| 0.01 | 4.4883 |
| 0.1 | 44.883 |
| 0.25 | 112.208 |
| 0.5 | 224.415 |
| 1 | 448.83 |
| 2 | 897.661 |
| 3 | 1346.49 |
| 5 | 2244.15 |
| 10 | 4488.3 |
| 15 | 6732.46 |
| 20 | 8976.61 |
| 25 | 11220.8 |
| 50 | 22441.5 |
| 75 | 33662.3 |
| 100 | 44883 |
| 250 | 112208 |
| 500 | 224415 |
| 1000 | 448830 |
| 5000 | 2244150 |
| 10000 | 4488300 |
Understanding Cubic feet per second
The Cubic foot per second (symbol: ft³/s) is a unit of volumetric flow rate. An imperial flow-rate unit used predominantly in US hydrology, river-discharge measurement, water-resource engineering, and large-scale waterworks design. Also called "cfs" or the colloquial "cusec" in US water-resources jargon. The US Geological Survey (USGS) StreamStats and the National Water Information System publish all US river streamgage data in cfs — a federal reporting standard since the 1950s. US Army Corps of Engineers flood-routing analyses, FEMA flood-insurance studies, and state water-rights records (especially in the western US under prior-appropriation doctrine) all measure discharge in cfs. Reference values: a small headwater stream might flow 5-20 cfs at base flow and 200-500 cfs during a 100-year storm; the Colorado River below Glen Canyon Dam is typically 8,000-25,000 cfs; the lower Mississippi runs 350,000-600,000 cfs depending on the season. 1 ft³/s = 7.4805 US gallons per second = 449 GPM = 28.32 L/s = 0.02832 m³/s.
It belongs to the imperial measurement system.
Cubic feet per second 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 second to Gallons per minute?
Converting between Cubic feet per second 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 second to Gallons per minute?
An imperial flow-rate unit used predominantly in US hydrology, river-discharge measurement, water-resource engineering, and large-scale waterworks design. To convert Cubic feet per second to Gallons per minute, multiply by 448.83. For example, 25 ft³/s equals 11220.8 GPM.
How many Gallons per minute are in 1 Cubic foot per second?
There are 448.83 Gallons per minute in 1 Cubic foot per second.
How many Cubic feet per second are in 1 Gallon per minute?
There are 0.00222801 Cubic feet per second in 1 Gallon per minute.
What is the formula for Cubic foot per second to Gallon per minute conversion?
The formula is: multiply by 448.83. This means 1 ft³/s = 448.83 GPM.
Is a Cubic foot per second bigger than a Gallon per minute?
No. One Cubic foot per second is smaller than one Gallon per minute because 1 ft³/s equals 448.83 GPM, which is greater than 1.
When do you need to convert between Cubic feet per second and Gallons per minute?
A US customary flow-rate unit (US gallons per minute, where 1 US gallon = 3. Cubic foot per second 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.