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 “Litre per second” (L/s) is a crucial unit in fluid dynamics, representing the flow rate of liquids. It is widely used in engineering, hydrology, and environmental science to measure water consumption, irrigation, and sewage treatment. For instance, high-performance showerheads can have flow rates approaching 0.1 to 0.2 L/s, translating to a refreshing and efficient bath.
In larger applications, such as hydroelectric plants, turbines can handle thousands of litres per second to generate energy, showcasing how scale affects its utility. The versatility of the L/s unit enables precise calculations and planning, crucial for managing water resources in a world where sustainability is paramount. Understanding flow rates can optimize resource use, conserving water and energy in both household and industrial environments.
Cubic feet per second | Litres per second |
---|---|
0
ft³/s
|
0
l/s
|
1
ft³/s
|
28.31683
l/s
|
2
ft³/s
|
56.63366
l/s
|
3
ft³/s
|
84.9505
l/s
|
4
ft³/s
|
113.26733
l/s
|
5
ft³/s
|
141.58416
l/s
|
6
ft³/s
|
169.90099
l/s
|
7
ft³/s
|
198.21782
l/s
|
8
ft³/s
|
226.53466
l/s
|
9
ft³/s
|
254.85149
l/s
|
10
ft³/s
|
283.16832
l/s
|
11
ft³/s
|
311.48515
l/s
|
12
ft³/s
|
339.80198
l/s
|
13
ft³/s
|
368.11882
l/s
|
14
ft³/s
|
396.43565
l/s
|
15
ft³/s
|
424.75248
l/s
|
16
ft³/s
|
453.06931
l/s
|
17
ft³/s
|
481.38614
l/s
|
18
ft³/s
|
509.70298
l/s
|
19
ft³/s
|
538.01981
l/s
|
20
ft³/s
|
566.33664
l/s
|
21
ft³/s
|
594.65347
l/s
|
22
ft³/s
|
622.9703
l/s
|
23
ft³/s
|
651.28714
l/s
|
24
ft³/s
|
679.60397
l/s
|
25
ft³/s
|
707.9208
l/s
|
26
ft³/s
|
736.23763
l/s
|
27
ft³/s
|
764.55446
l/s
|
28
ft³/s
|
792.8713
l/s
|
29
ft³/s
|
821.18813
l/s
|
30
ft³/s
|
849.50496
l/s
|
31
ft³/s
|
877.82179
l/s
|
32
ft³/s
|
906.13862
l/s
|
33
ft³/s
|
934.45546
l/s
|
34
ft³/s
|
962.77229
l/s
|
35
ft³/s
|
991.08912
l/s
|
36
ft³/s
|
1019.40595
l/s
|
37
ft³/s
|
1047.72278
l/s
|
38
ft³/s
|
1076.03962
l/s
|
39
ft³/s
|
1104.35645
l/s
|
40
ft³/s
|
1132.67328
l/s
|
41
ft³/s
|
1160.99011
l/s
|
42
ft³/s
|
1189.30694
l/s
|
43
ft³/s
|
1217.62378
l/s
|
44
ft³/s
|
1245.94061
l/s
|
45
ft³/s
|
1274.25744
l/s
|
46
ft³/s
|
1302.57427
l/s
|
47
ft³/s
|
1330.8911
l/s
|
48
ft³/s
|
1359.20794
l/s
|
49
ft³/s
|
1387.52477
l/s
|
50
ft³/s
|
1415.8416
l/s
|
51
ft³/s
|
1444.15843
l/s
|
52
ft³/s
|
1472.47526
l/s
|
53
ft³/s
|
1500.7921
l/s
|
54
ft³/s
|
1529.10893
l/s
|
55
ft³/s
|
1557.42576
l/s
|
56
ft³/s
|
1585.74259
l/s
|
57
ft³/s
|
1614.05942
l/s
|
58
ft³/s
|
1642.37626
l/s
|
59
ft³/s
|
1670.69309
l/s
|
60
ft³/s
|
1699.00992
l/s
|
61
ft³/s
|
1727.32675
l/s
|
62
ft³/s
|
1755.64358
l/s
|
63
ft³/s
|
1783.96042
l/s
|
64
ft³/s
|
1812.27725
l/s
|
65
ft³/s
|
1840.59408
l/s
|
66
ft³/s
|
1868.91091
l/s
|
67
ft³/s
|
1897.22774
l/s
|
68
ft³/s
|
1925.54458
l/s
|
69
ft³/s
|
1953.86141
l/s
|
70
ft³/s
|
1982.17824
l/s
|
71
ft³/s
|
2010.49507
l/s
|
72
ft³/s
|
2038.8119
l/s
|
73
ft³/s
|
2067.12874
l/s
|
74
ft³/s
|
2095.44557
l/s
|
75
ft³/s
|
2123.7624
l/s
|
76
ft³/s
|
2152.07923
l/s
|
77
ft³/s
|
2180.39606
l/s
|
78
ft³/s
|
2208.7129
l/s
|
79
ft³/s
|
2237.02973
l/s
|
80
ft³/s
|
2265.34656
l/s
|
81
ft³/s
|
2293.66339
l/s
|
82
ft³/s
|
2321.98022
l/s
|
83
ft³/s
|
2350.29706
l/s
|
84
ft³/s
|
2378.61389
l/s
|
85
ft³/s
|
2406.93072
l/s
|
86
ft³/s
|
2435.24755
l/s
|
87
ft³/s
|
2463.56438
l/s
|
88
ft³/s
|
2491.88122
l/s
|
89
ft³/s
|
2520.19805
l/s
|
90
ft³/s
|
2548.51488
l/s
|
91
ft³/s
|
2576.83171
l/s
|
92
ft³/s
|
2605.14854
l/s
|
93
ft³/s
|
2633.46538
l/s
|
94
ft³/s
|
2661.78221
l/s
|
95
ft³/s
|
2690.09904
l/s
|
96
ft³/s
|
2718.41587
l/s
|
97
ft³/s
|
2746.7327
l/s
|
98
ft³/s
|
2775.04954
l/s
|
99
ft³/s
|
2803.36637
l/s
|
100
ft³/s
|
2831.6832
l/s
|
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