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.
The cubic inch per minute (in³/min) may seem like a mundane unit, but it holds importance in various engineering and mechanical applications. This unit measures volumetric flow rate, essentially how much space a fluid occupies as it moves through a system over time. Notably, it’s often used in hydraulic systems to determine the flow of liquids like oil, which is crucial for ensuring machinery operates smoothly and efficiently.
Historically, the cubic inch was a fundamental unit in U.S. manufacturing, particularly in the automotive industry. Engines were once commonly described by their displacement in cubic inches, influencing a cultural appreciation for engine size. These volumetric measurements have paved the way for engineers to design more efficient fluid systems, influencing technologies from simple pump systems to complex aerospace engineering.
Cubic feet per second | Cubic inches per minute |
---|---|
0
ft³/s
|
0
in³/min
|
1
ft³/s
|
103680.42446
in³/min
|
2
ft³/s
|
207360.84893
in³/min
|
3
ft³/s
|
311041.27339
in³/min
|
4
ft³/s
|
414721.69786
in³/min
|
5
ft³/s
|
518402.12232
in³/min
|
6
ft³/s
|
622082.54679
in³/min
|
7
ft³/s
|
725762.97125
in³/min
|
8
ft³/s
|
829443.39572
in³/min
|
9
ft³/s
|
933123.82018
in³/min
|
10
ft³/s
|
1036804.24464
in³/min
|
11
ft³/s
|
1140484.66911
in³/min
|
12
ft³/s
|
1244165.09357
in³/min
|
13
ft³/s
|
1347845.51804
in³/min
|
14
ft³/s
|
1451525.9425
in³/min
|
15
ft³/s
|
1555206.36697
in³/min
|
16
ft³/s
|
1658886.79143
in³/min
|
17
ft³/s
|
1762567.2159
in³/min
|
18
ft³/s
|
1866247.64036
in³/min
|
19
ft³/s
|
1969928.06482
in³/min
|
20
ft³/s
|
2073608.48929
in³/min
|
21
ft³/s
|
2177288.91375
in³/min
|
22
ft³/s
|
2280969.33822
in³/min
|
23
ft³/s
|
2384649.76268
in³/min
|
24
ft³/s
|
2488330.18715
in³/min
|
25
ft³/s
|
2592010.61161
in³/min
|
26
ft³/s
|
2695691.03608
in³/min
|
27
ft³/s
|
2799371.46054
in³/min
|
28
ft³/s
|
2903051.885
in³/min
|
29
ft³/s
|
3006732.30947
in³/min
|
30
ft³/s
|
3110412.73393
in³/min
|
31
ft³/s
|
3214093.1584
in³/min
|
32
ft³/s
|
3317773.58286
in³/min
|
33
ft³/s
|
3421454.00733
in³/min
|
34
ft³/s
|
3525134.43179
in³/min
|
35
ft³/s
|
3628814.85626
in³/min
|
36
ft³/s
|
3732495.28072
in³/min
|
37
ft³/s
|
3836175.70518
in³/min
|
38
ft³/s
|
3939856.12965
in³/min
|
39
ft³/s
|
4043536.55411
in³/min
|
40
ft³/s
|
4147216.97858
in³/min
|
41
ft³/s
|
4250897.40304
in³/min
|
42
ft³/s
|
4354577.82751
in³/min
|
43
ft³/s
|
4458258.25197
in³/min
|
44
ft³/s
|
4561938.67644
in³/min
|
45
ft³/s
|
4665619.1009
in³/min
|
46
ft³/s
|
4769299.52537
in³/min
|
47
ft³/s
|
4872979.94983
in³/min
|
48
ft³/s
|
4976660.37429
in³/min
|
49
ft³/s
|
5080340.79876
in³/min
|
50
ft³/s
|
5184021.22322
in³/min
|
51
ft³/s
|
5287701.64769
in³/min
|
52
ft³/s
|
5391382.07215
in³/min
|
53
ft³/s
|
5495062.49662
in³/min
|
54
ft³/s
|
5598742.92108
in³/min
|
55
ft³/s
|
5702423.34555
in³/min
|
56
ft³/s
|
5806103.77001
in³/min
|
57
ft³/s
|
5909784.19447
in³/min
|
58
ft³/s
|
6013464.61894
in³/min
|
59
ft³/s
|
6117145.0434
in³/min
|
60
ft³/s
|
6220825.46787
in³/min
|
61
ft³/s
|
6324505.89233
in³/min
|
62
ft³/s
|
6428186.3168
in³/min
|
63
ft³/s
|
6531866.74126
in³/min
|
64
ft³/s
|
6635547.16573
in³/min
|
65
ft³/s
|
6739227.59019
in³/min
|
66
ft³/s
|
6842908.01465
in³/min
|
67
ft³/s
|
6946588.43912
in³/min
|
68
ft³/s
|
7050268.86358
in³/min
|
69
ft³/s
|
7153949.28805
in³/min
|
70
ft³/s
|
7257629.71251
in³/min
|
71
ft³/s
|
7361310.13698
in³/min
|
72
ft³/s
|
7464990.56144
in³/min
|
73
ft³/s
|
7568670.98591
in³/min
|
74
ft³/s
|
7672351.41037
in³/min
|
75
ft³/s
|
7776031.83483
in³/min
|
76
ft³/s
|
7879712.2593
in³/min
|
77
ft³/s
|
7983392.68376
in³/min
|
78
ft³/s
|
8087073.10823
in³/min
|
79
ft³/s
|
8190753.53269
in³/min
|
80
ft³/s
|
8294433.95716
in³/min
|
81
ft³/s
|
8398114.38162
in³/min
|
82
ft³/s
|
8501794.80609
in³/min
|
83
ft³/s
|
8605475.23055
in³/min
|
84
ft³/s
|
8709155.65501
in³/min
|
85
ft³/s
|
8812836.07948
in³/min
|
86
ft³/s
|
8916516.50394
in³/min
|
87
ft³/s
|
9020196.92841
in³/min
|
88
ft³/s
|
9123877.35287
in³/min
|
89
ft³/s
|
9227557.77734
in³/min
|
90
ft³/s
|
9331238.2018
in³/min
|
91
ft³/s
|
9434918.62627
in³/min
|
92
ft³/s
|
9538599.05073
in³/min
|
93
ft³/s
|
9642279.47519
in³/min
|
94
ft³/s
|
9745959.89966
in³/min
|
95
ft³/s
|
9849640.32412
in³/min
|
96
ft³/s
|
9953320.74859
in³/min
|
97
ft³/s
|
1.0057e+7
in³/min
|
98
ft³/s
|
1.01607e+7
in³/min
|
99
ft³/s
|
1.02644e+7
in³/min
|
100
ft³/s
|
1.0368e+7
in³/min
|
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