Cubic foot per second (ft³/s)
One cubic foot every second. US river flows are given in cfs.
What is a cubic foot per second?
- Symbol
- ft³/s
- Quantity
- Flow Rate
- Unit system
- US customary
- Definition
- One cubic foot every second. US river flows are given in cfs.
- Exact
- Yes, the value is exact by definition
- Source
- NIST Special Publication 811 (2008), Appendix B.8
Common applications
Used in the United States for river and stream flow gauges, irrigation and stormwater design.
Cubic foot per second in other flow rate units
- 1 ft³/s = 0.028316846592 m³/sCubic foot per second to Cubic meter per second converter
- 1 ft³/s = 101.9406477312 m³/hCubic meter per hour
- 1 ft³/s = 1.69901079552 m³/minCubic meter per minute
- 1 ft³/s = 28.316846592 L/sLiter per second
- 1 ft³/s = 1699.01079552 L/minLiter per minute
- 1 ft³/s = 101940.6477312 L/hLiter per hour
- 1 ft³/s = 1699010.79552 mL/minMilliliter per minute
- 1 ft³/s = 60 CFMCubic foot per minute
- 1 ft³/s ≈ 448.8311688 GPMGallon (US) per minute
- 1 ft³/s ≈ 26929.87013 GPHGallon (US) per hour
- 1 ft³/s ≈ 646316.8831 GPDGallon (US) per day
- 1 ft³/s ≈ 0.6463168831 MGDMillion gallons (US) per day
- 1 ft³/s ≈ 373.7301275 imp gal/minGallon (imperial) per minute
- 1 ft³/s ≈ 15388.49722 bbl/dBarrel (oil) per day
Cubic foot per second quick reference
| Cubic foot per second | Cubic meter per second | Liter per minute | Gallon (US) per minute |
|---|---|---|---|
| 1 ft³/s | = 0.028316846592 m³/s | = 1699.01079552 L/min | ≈ 448.8311688 GPM |
| 10 ft³/s | = 0.28316846592 m³/s | = 16990.1079552 L/min | ≈ 4488.311688 GPM |
| 100 ft³/s | = 2.8316846592 m³/s | = 169901.079552 L/min | ≈ 44883.11688 GPM |
| 1000 ft³/s | = 28.316846592 m³/s | = 1699010.79552 L/min | ≈ 448831.1688 GPM |
Where the cubic foot per second fits
The next smaller flow rate unit is the cubic meter per minute (m³/min). 1 ft³/s = 1.69901079552 m³/min, and 1 m³/min ≈ 0.5885777787 ft³/s.
The next larger flow rate unit is the million US gallons per day (MGD). 1 ft³/s ≈ 0.6463168831 MGD, and 1 MGD ≈ 1.547228652 ft³/s.
Frequently asked questions
- How many cubic meters per second are in one cubic foot per second?
- One cubic foot per second = 0.028316846592 m³/s (cubic meters per second).
- How many liters per minute are in one cubic foot per second?
- One cubic foot per second = 1699.01079552 L/min (liters per minute).
- How many US gallons per minute are in one cubic foot per second?
- One cubic foot per second ≈ 448.8311688 GPM (US gallons per minute).