Gallon per minute (GPM) is a crucial unit in measuring flow rate, especially in the context of plumbing, irrigation, and various industrial applications. Originally rooted in the British Imperial system, the gallon has a rich history with variations across countries—such as the US liquid gallon, which is approximately 3.785 liters, and the UK gallon, which is around 4.546 liters. This means that when considering flow rates, the distinction between these gallons can lead to significant differences in calculation and application.
What’s particularly fascinating about GPM is its pivotal role in modern sustainability efforts. For example, showerheads in the United States are often rated by their GPM to help reduce water usage and promote conservation. Low-flow fixtures, which typically limit water flow to 2.5 GPM or less, have become a standard in reducing both water waste and energy costs, highlighting the intersection of environmental responsibility and engineering.
“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.
Gallons per minute | Gallons per second |
---|---|
0
gal/min
|
0
gal/s
|
10
gal/min
|
0.166667
gal/s
|
20
gal/min
|
0.333333
gal/s
|
30
gal/min
|
0.5
gal/s
|
40
gal/min
|
0.666667
gal/s
|
50
gal/min
|
0.833333
gal/s
|
60
gal/min
|
1
gal/s
|
70
gal/min
|
1.16667
gal/s
|
80
gal/min
|
1.33333
gal/s
|
90
gal/min
|
1.5
gal/s
|
100
gal/min
|
1.66667
gal/s
|
110
gal/min
|
1.83333
gal/s
|
120
gal/min
|
2
gal/s
|
130
gal/min
|
2.16667
gal/s
|
140
gal/min
|
2.33333
gal/s
|
150
gal/min
|
2.5
gal/s
|
160
gal/min
|
2.66667
gal/s
|
170
gal/min
|
2.83333
gal/s
|
180
gal/min
|
3
gal/s
|
190
gal/min
|
3.16667
gal/s
|
200
gal/min
|
3.33333
gal/s
|
210
gal/min
|
3.5
gal/s
|
220
gal/min
|
3.66667
gal/s
|
230
gal/min
|
3.83333
gal/s
|
240
gal/min
|
4
gal/s
|
250
gal/min
|
4.16667
gal/s
|
260
gal/min
|
4.33333
gal/s
|
270
gal/min
|
4.5
gal/s
|
280
gal/min
|
4.66667
gal/s
|
290
gal/min
|
4.83333
gal/s
|
300
gal/min
|
5
gal/s
|
310
gal/min
|
5.16667
gal/s
|
320
gal/min
|
5.33333
gal/s
|
330
gal/min
|
5.5
gal/s
|
340
gal/min
|
5.66667
gal/s
|
350
gal/min
|
5.83333
gal/s
|
360
gal/min
|
6
gal/s
|
370
gal/min
|
6.16667
gal/s
|
380
gal/min
|
6.33333
gal/s
|
390
gal/min
|
6.5
gal/s
|
400
gal/min
|
6.66667
gal/s
|
410
gal/min
|
6.83333
gal/s
|
420
gal/min
|
7
gal/s
|
430
gal/min
|
7.16667
gal/s
|
440
gal/min
|
7.33333
gal/s
|
450
gal/min
|
7.5
gal/s
|
460
gal/min
|
7.66667
gal/s
|
470
gal/min
|
7.83333
gal/s
|
480
gal/min
|
8
gal/s
|
490
gal/min
|
8.16667
gal/s
|
500
gal/min
|
8.33333
gal/s
|
510
gal/min
|
8.5
gal/s
|
520
gal/min
|
8.66667
gal/s
|
530
gal/min
|
8.83333
gal/s
|
540
gal/min
|
9
gal/s
|
550
gal/min
|
9.16667
gal/s
|
560
gal/min
|
9.33333
gal/s
|
570
gal/min
|
9.5
gal/s
|
580
gal/min
|
9.66667
gal/s
|
590
gal/min
|
9.83333
gal/s
|
600
gal/min
|
10
gal/s
|
610
gal/min
|
10.16667
gal/s
|
620
gal/min
|
10.33333
gal/s
|
630
gal/min
|
10.5
gal/s
|
640
gal/min
|
10.66667
gal/s
|
650
gal/min
|
10.83333
gal/s
|
660
gal/min
|
11
gal/s
|
670
gal/min
|
11.16667
gal/s
|
680
gal/min
|
11.33333
gal/s
|
690
gal/min
|
11.5
gal/s
|
700
gal/min
|
11.66667
gal/s
|
710
gal/min
|
11.83333
gal/s
|
720
gal/min
|
12
gal/s
|
730
gal/min
|
12.16667
gal/s
|
740
gal/min
|
12.33333
gal/s
|
750
gal/min
|
12.5
gal/s
|
760
gal/min
|
12.66667
gal/s
|
770
gal/min
|
12.83333
gal/s
|
780
gal/min
|
13
gal/s
|
790
gal/min
|
13.16667
gal/s
|
800
gal/min
|
13.33333
gal/s
|
810
gal/min
|
13.5
gal/s
|
820
gal/min
|
13.66667
gal/s
|
830
gal/min
|
13.83333
gal/s
|
840
gal/min
|
14
gal/s
|
850
gal/min
|
14.16667
gal/s
|
860
gal/min
|
14.33333
gal/s
|
870
gal/min
|
14.5
gal/s
|
880
gal/min
|
14.66667
gal/s
|
890
gal/min
|
14.83333
gal/s
|
900
gal/min
|
15
gal/s
|
910
gal/min
|
15.16667
gal/s
|
920
gal/min
|
15.33333
gal/s
|
930
gal/min
|
15.5
gal/s
|
940
gal/min
|
15.66667
gal/s
|
950
gal/min
|
15.83333
gal/s
|
960
gal/min
|
16
gal/s
|
970
gal/min
|
16.16667
gal/s
|
980
gal/min
|
16.33333
gal/s
|
990
gal/min
|
16.5
gal/s
|
1000
gal/min
|
16.66667
gal/s
|
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