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.
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.
Gallons per minute | Quarts per second |
---|---|
0
gal/min
|
0
qt/s
|
10
gal/min
|
0.666667
qt/s
|
20
gal/min
|
1.33333
qt/s
|
30
gal/min
|
2
qt/s
|
40
gal/min
|
2.66667
qt/s
|
50
gal/min
|
3.33333
qt/s
|
60
gal/min
|
4
qt/s
|
70
gal/min
|
4.66667
qt/s
|
80
gal/min
|
5.33333
qt/s
|
90
gal/min
|
6
qt/s
|
100
gal/min
|
6.66667
qt/s
|
110
gal/min
|
7.33333
qt/s
|
120
gal/min
|
8
qt/s
|
130
gal/min
|
8.66667
qt/s
|
140
gal/min
|
9.33333
qt/s
|
150
gal/min
|
10
qt/s
|
160
gal/min
|
10.66667
qt/s
|
170
gal/min
|
11.33333
qt/s
|
180
gal/min
|
12
qt/s
|
190
gal/min
|
12.66667
qt/s
|
200
gal/min
|
13.33333
qt/s
|
210
gal/min
|
14
qt/s
|
220
gal/min
|
14.66667
qt/s
|
230
gal/min
|
15.33333
qt/s
|
240
gal/min
|
16
qt/s
|
250
gal/min
|
16.66667
qt/s
|
260
gal/min
|
17.33333
qt/s
|
270
gal/min
|
18
qt/s
|
280
gal/min
|
18.66667
qt/s
|
290
gal/min
|
19.33333
qt/s
|
300
gal/min
|
20
qt/s
|
310
gal/min
|
20.66667
qt/s
|
320
gal/min
|
21.33333
qt/s
|
330
gal/min
|
22
qt/s
|
340
gal/min
|
22.66667
qt/s
|
350
gal/min
|
23.33333
qt/s
|
360
gal/min
|
24
qt/s
|
370
gal/min
|
24.66667
qt/s
|
380
gal/min
|
25.33333
qt/s
|
390
gal/min
|
26
qt/s
|
400
gal/min
|
26.66667
qt/s
|
410
gal/min
|
27.33333
qt/s
|
420
gal/min
|
28
qt/s
|
430
gal/min
|
28.66667
qt/s
|
440
gal/min
|
29.33333
qt/s
|
450
gal/min
|
30
qt/s
|
460
gal/min
|
30.66667
qt/s
|
470
gal/min
|
31.33333
qt/s
|
480
gal/min
|
32
qt/s
|
490
gal/min
|
32.66667
qt/s
|
500
gal/min
|
33.33333
qt/s
|
510
gal/min
|
34
qt/s
|
520
gal/min
|
34.66667
qt/s
|
530
gal/min
|
35.33333
qt/s
|
540
gal/min
|
36
qt/s
|
550
gal/min
|
36.66667
qt/s
|
560
gal/min
|
37.33333
qt/s
|
570
gal/min
|
38
qt/s
|
580
gal/min
|
38.66667
qt/s
|
590
gal/min
|
39.33333
qt/s
|
600
gal/min
|
40
qt/s
|
610
gal/min
|
40.66667
qt/s
|
620
gal/min
|
41.33333
qt/s
|
630
gal/min
|
42
qt/s
|
640
gal/min
|
42.66667
qt/s
|
650
gal/min
|
43.33333
qt/s
|
660
gal/min
|
44
qt/s
|
670
gal/min
|
44.66667
qt/s
|
680
gal/min
|
45.33333
qt/s
|
690
gal/min
|
46
qt/s
|
700
gal/min
|
46.66667
qt/s
|
710
gal/min
|
47.33333
qt/s
|
720
gal/min
|
48
qt/s
|
730
gal/min
|
48.66667
qt/s
|
740
gal/min
|
49.33333
qt/s
|
750
gal/min
|
50
qt/s
|
760
gal/min
|
50.66667
qt/s
|
770
gal/min
|
51.33333
qt/s
|
780
gal/min
|
52
qt/s
|
790
gal/min
|
52.66667
qt/s
|
800
gal/min
|
53.33333
qt/s
|
810
gal/min
|
54
qt/s
|
820
gal/min
|
54.66667
qt/s
|
830
gal/min
|
55.33333
qt/s
|
840
gal/min
|
56
qt/s
|
850
gal/min
|
56.66667
qt/s
|
860
gal/min
|
57.33333
qt/s
|
870
gal/min
|
58
qt/s
|
880
gal/min
|
58.66667
qt/s
|
890
gal/min
|
59.33333
qt/s
|
900
gal/min
|
60
qt/s
|
910
gal/min
|
60.66667
qt/s
|
920
gal/min
|
61.33333
qt/s
|
930
gal/min
|
62
qt/s
|
940
gal/min
|
62.66667
qt/s
|
950
gal/min
|
63.33333
qt/s
|
960
gal/min
|
64
qt/s
|
970
gal/min
|
64.66667
qt/s
|
980
gal/min
|
65.33333
qt/s
|
990
gal/min
|
66
qt/s
|
1000
gal/min
|
66.66667
qt/s
|
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