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 quart per second is a unit typically used to measure flow rate, and it might seem a little unusual in everyday conversations. To put it in perspective, one quart per second is equivalent to the flow of nearly a gallon of liquid in just four seconds, showcasing its impressive speed for handling liquids. This unit is particularly useful in industrial settings, where understanding and controlling the rate of flow for substances like oil, water, or chemicals is crucial for efficiency and safety.
Interestingly, the quart has its roots in ancient measuring systems and is based on the Latin word “quartus,” meaning “fourth.” This highlights its historical significance, as early civilizations often used fractions of larger units to precisely measure goods. Whether you’re filling a swimming pool or calibrating a scientific experiment, a high flow rate such as quarts per second can indicate a significant and high-speed transfer of liquid.
Cubic feet per second | Quarts per second |
---|---|
0
ft³/s
|
0
qt/s
|
1
ft³/s
|
29.92206
qt/s
|
2
ft³/s
|
59.84413
qt/s
|
3
ft³/s
|
89.76619
qt/s
|
4
ft³/s
|
119.68825
qt/s
|
5
ft³/s
|
149.61031
qt/s
|
6
ft³/s
|
179.53238
qt/s
|
7
ft³/s
|
209.45444
qt/s
|
8
ft³/s
|
239.3765
qt/s
|
9
ft³/s
|
269.29856
qt/s
|
10
ft³/s
|
299.22063
qt/s
|
11
ft³/s
|
329.14269
qt/s
|
12
ft³/s
|
359.06475
qt/s
|
13
ft³/s
|
388.98681
qt/s
|
14
ft³/s
|
418.90888
qt/s
|
15
ft³/s
|
448.83094
qt/s
|
16
ft³/s
|
478.753
qt/s
|
17
ft³/s
|
508.67506
qt/s
|
18
ft³/s
|
538.59713
qt/s
|
19
ft³/s
|
568.51919
qt/s
|
20
ft³/s
|
598.44125
qt/s
|
21
ft³/s
|
628.36331
qt/s
|
22
ft³/s
|
658.28538
qt/s
|
23
ft³/s
|
688.20744
qt/s
|
24
ft³/s
|
718.1295
qt/s
|
25
ft³/s
|
748.05156
qt/s
|
26
ft³/s
|
777.97363
qt/s
|
27
ft³/s
|
807.89569
qt/s
|
28
ft³/s
|
837.81775
qt/s
|
29
ft³/s
|
867.73981
qt/s
|
30
ft³/s
|
897.66188
qt/s
|
31
ft³/s
|
927.58394
qt/s
|
32
ft³/s
|
957.506
qt/s
|
33
ft³/s
|
987.42806
qt/s
|
34
ft³/s
|
1017.35013
qt/s
|
35
ft³/s
|
1047.27219
qt/s
|
36
ft³/s
|
1077.19425
qt/s
|
37
ft³/s
|
1107.11631
qt/s
|
38
ft³/s
|
1137.03838
qt/s
|
39
ft³/s
|
1166.96044
qt/s
|
40
ft³/s
|
1196.8825
qt/s
|
41
ft³/s
|
1226.80456
qt/s
|
42
ft³/s
|
1256.72663
qt/s
|
43
ft³/s
|
1286.64869
qt/s
|
44
ft³/s
|
1316.57075
qt/s
|
45
ft³/s
|
1346.49281
qt/s
|
46
ft³/s
|
1376.41488
qt/s
|
47
ft³/s
|
1406.33694
qt/s
|
48
ft³/s
|
1436.259
qt/s
|
49
ft³/s
|
1466.18106
qt/s
|
50
ft³/s
|
1496.10313
qt/s
|
51
ft³/s
|
1526.02519
qt/s
|
52
ft³/s
|
1555.94725
qt/s
|
53
ft³/s
|
1585.86931
qt/s
|
54
ft³/s
|
1615.79138
qt/s
|
55
ft³/s
|
1645.71344
qt/s
|
56
ft³/s
|
1675.6355
qt/s
|
57
ft³/s
|
1705.55756
qt/s
|
58
ft³/s
|
1735.47963
qt/s
|
59
ft³/s
|
1765.40169
qt/s
|
60
ft³/s
|
1795.32375
qt/s
|
61
ft³/s
|
1825.24581
qt/s
|
62
ft³/s
|
1855.16788
qt/s
|
63
ft³/s
|
1885.08994
qt/s
|
64
ft³/s
|
1915.012
qt/s
|
65
ft³/s
|
1944.93406
qt/s
|
66
ft³/s
|
1974.85613
qt/s
|
67
ft³/s
|
2004.77819
qt/s
|
68
ft³/s
|
2034.70025
qt/s
|
69
ft³/s
|
2064.62231
qt/s
|
70
ft³/s
|
2094.54438
qt/s
|
71
ft³/s
|
2124.46644
qt/s
|
72
ft³/s
|
2154.3885
qt/s
|
73
ft³/s
|
2184.31056
qt/s
|
74
ft³/s
|
2214.23263
qt/s
|
75
ft³/s
|
2244.15469
qt/s
|
76
ft³/s
|
2274.07675
qt/s
|
77
ft³/s
|
2303.99881
qt/s
|
78
ft³/s
|
2333.92088
qt/s
|
79
ft³/s
|
2363.84294
qt/s
|
80
ft³/s
|
2393.765
qt/s
|
81
ft³/s
|
2423.68706
qt/s
|
82
ft³/s
|
2453.60913
qt/s
|
83
ft³/s
|
2483.53119
qt/s
|
84
ft³/s
|
2513.45325
qt/s
|
85
ft³/s
|
2543.37531
qt/s
|
86
ft³/s
|
2573.29738
qt/s
|
87
ft³/s
|
2603.21944
qt/s
|
88
ft³/s
|
2633.1415
qt/s
|
89
ft³/s
|
2663.06356
qt/s
|
90
ft³/s
|
2692.98563
qt/s
|
91
ft³/s
|
2722.90769
qt/s
|
92
ft³/s
|
2752.82975
qt/s
|
93
ft³/s
|
2782.75181
qt/s
|
94
ft³/s
|
2812.67388
qt/s
|
95
ft³/s
|
2842.59594
qt/s
|
96
ft³/s
|
2872.518
qt/s
|
97
ft³/s
|
2902.44006
qt/s
|
98
ft³/s
|
2932.36213
qt/s
|
99
ft³/s
|
2962.28419
qt/s
|
100
ft³/s
|
2992.20625
qt/s
|
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