“Gallon per second” is a fascinating unit of flow rate often used in engineering and environmental studies to quantify the movement of liquids. It might surprise you that in the United States, the Imperial gallon conversion to seconds adds an intriguing complexity. The U.S. gallon, used primarily in this unit, is smaller than the Imperial gallon used in the UK. This difference can significantly impact calculations involving large-scale water management systems or river flows.
Historically, variations of the gallon were used to measure commodities, including beer and wine, creating a diverse heritage for this versatile unit. Imagine that a single gallon per second flow rate could fill an Olympic-sized swimming pool in just under 32 hours! Such conversions shed light on the immense scale of water flow in various applications, from plumbing to hydrology.
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.
Gallons per second | Cubic feet per second |
---|---|
0
gal/s
|
0
ft³/s
|
0.5
gal/s
|
0.0668403
ft³/s
|
1
gal/s
|
0.133681
ft³/s
|
1.5
gal/s
|
0.200521
ft³/s
|
2
gal/s
|
0.267361
ft³/s
|
2.5
gal/s
|
0.334202
ft³/s
|
3
gal/s
|
0.401042
ft³/s
|
3.5
gal/s
|
0.467882
ft³/s
|
4
gal/s
|
0.534722
ft³/s
|
4.5
gal/s
|
0.601563
ft³/s
|
5
gal/s
|
0.668403
ft³/s
|
5.5
gal/s
|
0.735243
ft³/s
|
6
gal/s
|
0.802084
ft³/s
|
6.5
gal/s
|
0.868924
ft³/s
|
7
gal/s
|
0.935764
ft³/s
|
7.5
gal/s
|
1.0026
ft³/s
|
8
gal/s
|
1.06944
ft³/s
|
8.5
gal/s
|
1.13629
ft³/s
|
9
gal/s
|
1.20313
ft³/s
|
9.5
gal/s
|
1.26997
ft³/s
|
10
gal/s
|
1.33681
ft³/s
|
10.5
gal/s
|
1.40365
ft³/s
|
11
gal/s
|
1.47049
ft³/s
|
11.5
gal/s
|
1.53733
ft³/s
|
12
gal/s
|
1.60417
ft³/s
|
12.5
gal/s
|
1.67101
ft³/s
|
13
gal/s
|
1.73785
ft³/s
|
13.5
gal/s
|
1.80469
ft³/s
|
14
gal/s
|
1.87153
ft³/s
|
14.5
gal/s
|
1.93837
ft³/s
|
15
gal/s
|
2.00521
ft³/s
|
15.5
gal/s
|
2.07205
ft³/s
|
16
gal/s
|
2.13889
ft³/s
|
16.5
gal/s
|
2.20573
ft³/s
|
17
gal/s
|
2.27257
ft³/s
|
17.5
gal/s
|
2.33941
ft³/s
|
18
gal/s
|
2.40625
ft³/s
|
18.5
gal/s
|
2.47309
ft³/s
|
19
gal/s
|
2.53993
ft³/s
|
19.5
gal/s
|
2.60677
ft³/s
|
20
gal/s
|
2.67361
ft³/s
|
20.5
gal/s
|
2.74045
ft³/s
|
21
gal/s
|
2.80729
ft³/s
|
21.5
gal/s
|
2.87413
ft³/s
|
22
gal/s
|
2.94097
ft³/s
|
22.5
gal/s
|
3.00781
ft³/s
|
23
gal/s
|
3.07465
ft³/s
|
23.5
gal/s
|
3.14149
ft³/s
|
24
gal/s
|
3.20833
ft³/s
|
24.5
gal/s
|
3.27518
ft³/s
|
25
gal/s
|
3.34202
ft³/s
|
25.5
gal/s
|
3.40886
ft³/s
|
26
gal/s
|
3.4757
ft³/s
|
26.5
gal/s
|
3.54254
ft³/s
|
27
gal/s
|
3.60938
ft³/s
|
27.5
gal/s
|
3.67622
ft³/s
|
28
gal/s
|
3.74306
ft³/s
|
28.5
gal/s
|
3.8099
ft³/s
|
29
gal/s
|
3.87674
ft³/s
|
29.5
gal/s
|
3.94358
ft³/s
|
30
gal/s
|
4.01042
ft³/s
|
30.5
gal/s
|
4.07726
ft³/s
|
31
gal/s
|
4.1441
ft³/s
|
31.5
gal/s
|
4.21094
ft³/s
|
32
gal/s
|
4.27778
ft³/s
|
32.5
gal/s
|
4.34462
ft³/s
|
33
gal/s
|
4.41146
ft³/s
|
33.5
gal/s
|
4.4783
ft³/s
|
34
gal/s
|
4.54514
ft³/s
|
34.5
gal/s
|
4.61198
ft³/s
|
35
gal/s
|
4.67882
ft³/s
|
35.5
gal/s
|
4.74566
ft³/s
|
36
gal/s
|
4.8125
ft³/s
|
36.5
gal/s
|
4.87934
ft³/s
|
37
gal/s
|
4.94618
ft³/s
|
37.5
gal/s
|
5.01302
ft³/s
|
38
gal/s
|
5.07986
ft³/s
|
38.5
gal/s
|
5.1467
ft³/s
|
39
gal/s
|
5.21354
ft³/s
|
39.5
gal/s
|
5.28038
ft³/s
|
40
gal/s
|
5.34722
ft³/s
|
40.5
gal/s
|
5.41407
ft³/s
|
41
gal/s
|
5.48091
ft³/s
|
41.5
gal/s
|
5.54775
ft³/s
|
42
gal/s
|
5.61459
ft³/s
|
42.5
gal/s
|
5.68143
ft³/s
|
43
gal/s
|
5.74827
ft³/s
|
43.5
gal/s
|
5.81511
ft³/s
|
44
gal/s
|
5.88195
ft³/s
|
44.5
gal/s
|
5.94879
ft³/s
|
45
gal/s
|
6.01563
ft³/s
|
45.5
gal/s
|
6.08247
ft³/s
|
46
gal/s
|
6.14931
ft³/s
|
46.5
gal/s
|
6.21615
ft³/s
|
47
gal/s
|
6.28299
ft³/s
|
47.5
gal/s
|
6.34983
ft³/s
|
48
gal/s
|
6.41667
ft³/s
|
48.5
gal/s
|
6.48351
ft³/s
|
49
gal/s
|
6.55035
ft³/s
|
49.5
gal/s
|
6.61719
ft³/s
|
50
gal/s
|
6.68403
ft³/s
|
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