A cubic foot per second (cfs) is a unit of flow rate that describes the volume of water or other fluids moving past a point every second. It is commonly used in hydrology to measure rivers and streams, providing insight into water availability and flood prediction. To put it in perspective, one cubic foot per second is equivalent to 7.48 gallons per second. Thus, a modest stream might flow at several tens of cfs, while larger rivers, such as the Mississippi, can exceed 500,000 cfs!
Interestingly, this unit has historical significance dating back to the early days of water management, where it played a crucial role in the development of infrastructure for agriculture and urban planning, influencing patterns of settlement and economic development around the world.
Cubic foot per minute (CFM) is a unit that measures the flow rate of air and is widely used in various industries, from HVAC systems to automotive engineering. Understanding CFM is crucial for designing efficient ventilation systems, as it determines how much air is circulated within a specific space per minute. But did you know that the origins of measuring air flow date back to the early 20th century? Back then, engineers realized the need for standardized measurements to ensure optimal air quality and comfortable living conditions, which led to the popularization of CFM as a standard metric.
Remarkably, one cubic foot of air at room temperature weighs about 0.0807 pounds. With this knowledge, professionals can precisely calibrate systems to achieve desired airflow rates, maximize energy efficiency, and improve air quality. Whether managing the air systems in skyscrapers, homes, or cars, CFM remains a pivotal unit for ensuring environments stay fresh and healthy.
Cubic feet per second | Cubic feet per minute |
---|---|
0
ft³/s
|
0
ft³/min
|
1
ft³/s
|
60
ft³/min
|
2
ft³/s
|
120
ft³/min
|
3
ft³/s
|
180
ft³/min
|
4
ft³/s
|
240
ft³/min
|
5
ft³/s
|
300
ft³/min
|
6
ft³/s
|
360
ft³/min
|
7
ft³/s
|
420
ft³/min
|
8
ft³/s
|
480
ft³/min
|
9
ft³/s
|
540
ft³/min
|
10
ft³/s
|
600
ft³/min
|
11
ft³/s
|
660
ft³/min
|
12
ft³/s
|
720
ft³/min
|
13
ft³/s
|
780
ft³/min
|
14
ft³/s
|
840
ft³/min
|
15
ft³/s
|
900
ft³/min
|
16
ft³/s
|
960
ft³/min
|
17
ft³/s
|
1020
ft³/min
|
18
ft³/s
|
1080
ft³/min
|
19
ft³/s
|
1140
ft³/min
|
20
ft³/s
|
1200
ft³/min
|
21
ft³/s
|
1260
ft³/min
|
22
ft³/s
|
1320
ft³/min
|
23
ft³/s
|
1380
ft³/min
|
24
ft³/s
|
1440
ft³/min
|
25
ft³/s
|
1500
ft³/min
|
26
ft³/s
|
1560
ft³/min
|
27
ft³/s
|
1620
ft³/min
|
28
ft³/s
|
1680
ft³/min
|
29
ft³/s
|
1740
ft³/min
|
30
ft³/s
|
1800
ft³/min
|
31
ft³/s
|
1860
ft³/min
|
32
ft³/s
|
1920
ft³/min
|
33
ft³/s
|
1980
ft³/min
|
34
ft³/s
|
2040
ft³/min
|
35
ft³/s
|
2100
ft³/min
|
36
ft³/s
|
2160
ft³/min
|
37
ft³/s
|
2220
ft³/min
|
38
ft³/s
|
2280
ft³/min
|
39
ft³/s
|
2340
ft³/min
|
40
ft³/s
|
2400
ft³/min
|
41
ft³/s
|
2460
ft³/min
|
42
ft³/s
|
2520
ft³/min
|
43
ft³/s
|
2580
ft³/min
|
44
ft³/s
|
2640
ft³/min
|
45
ft³/s
|
2700
ft³/min
|
46
ft³/s
|
2760
ft³/min
|
47
ft³/s
|
2820
ft³/min
|
48
ft³/s
|
2880
ft³/min
|
49
ft³/s
|
2940
ft³/min
|
50
ft³/s
|
3000
ft³/min
|
51
ft³/s
|
3060
ft³/min
|
52
ft³/s
|
3120
ft³/min
|
53
ft³/s
|
3180
ft³/min
|
54
ft³/s
|
3240
ft³/min
|
55
ft³/s
|
3300
ft³/min
|
56
ft³/s
|
3360
ft³/min
|
57
ft³/s
|
3420
ft³/min
|
58
ft³/s
|
3480
ft³/min
|
59
ft³/s
|
3540
ft³/min
|
60
ft³/s
|
3600
ft³/min
|
61
ft³/s
|
3660
ft³/min
|
62
ft³/s
|
3720
ft³/min
|
63
ft³/s
|
3780
ft³/min
|
64
ft³/s
|
3840
ft³/min
|
65
ft³/s
|
3900
ft³/min
|
66
ft³/s
|
3960
ft³/min
|
67
ft³/s
|
4020
ft³/min
|
68
ft³/s
|
4080
ft³/min
|
69
ft³/s
|
4140
ft³/min
|
70
ft³/s
|
4200
ft³/min
|
71
ft³/s
|
4260
ft³/min
|
72
ft³/s
|
4320
ft³/min
|
73
ft³/s
|
4380
ft³/min
|
74
ft³/s
|
4440
ft³/min
|
75
ft³/s
|
4500
ft³/min
|
76
ft³/s
|
4560
ft³/min
|
77
ft³/s
|
4620
ft³/min
|
78
ft³/s
|
4680
ft³/min
|
79
ft³/s
|
4740
ft³/min
|
80
ft³/s
|
4800
ft³/min
|
81
ft³/s
|
4860
ft³/min
|
82
ft³/s
|
4920
ft³/min
|
83
ft³/s
|
4980
ft³/min
|
84
ft³/s
|
5040
ft³/min
|
85
ft³/s
|
5100
ft³/min
|
86
ft³/s
|
5160
ft³/min
|
87
ft³/s
|
5220
ft³/min
|
88
ft³/s
|
5280
ft³/min
|
89
ft³/s
|
5340
ft³/min
|
90
ft³/s
|
5400
ft³/min
|
91
ft³/s
|
5460
ft³/min
|
92
ft³/s
|
5520
ft³/min
|
93
ft³/s
|
5580
ft³/min
|
94
ft³/s
|
5640
ft³/min
|
95
ft³/s
|
5700
ft³/min
|
96
ft³/s
|
5760
ft³/min
|
97
ft³/s
|
5820
ft³/min
|
98
ft³/s
|
5880
ft³/min
|
99
ft³/s
|
5940
ft³/min
|
100
ft³/s
|
6000
ft³/min
|
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