Cubic foot per minute (CFM) is a unit that measures the flow rate of air and is widely used in various industries, from HVAC systems to automotive engineering. Understanding CFM is crucial for designing efficient ventilation systems, as it determines how much air is circulated within a specific space per minute. But did you know that the origins of measuring air flow date back to the early 20th century? Back then, engineers realized the need for standardized measurements to ensure optimal air quality and comfortable living conditions, which led to the popularization of CFM as a standard metric.
Remarkably, one cubic foot of air at room temperature weighs about 0.0807 pounds. With this knowledge, professionals can precisely calibrate systems to achieve desired airflow rates, maximize energy efficiency, and improve air quality. Whether managing the air systems in skyscrapers, homes, or cars, CFM remains a pivotal unit for ensuring environments stay fresh and healthy.
“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.
Cubic feet per minute | Gallons per second |
---|---|
0
ft³/min
|
0
gal/s
|
10
ft³/min
|
1.24675
gal/s
|
20
ft³/min
|
2.49351
gal/s
|
30
ft³/min
|
3.74026
gal/s
|
40
ft³/min
|
4.98701
gal/s
|
50
ft³/min
|
6.23376
gal/s
|
60
ft³/min
|
7.48052
gal/s
|
70
ft³/min
|
8.72727
gal/s
|
80
ft³/min
|
9.97402
gal/s
|
90
ft³/min
|
11.22077
gal/s
|
100
ft³/min
|
12.46753
gal/s
|
110
ft³/min
|
13.71428
gal/s
|
120
ft³/min
|
14.96103
gal/s
|
130
ft³/min
|
16.20778
gal/s
|
140
ft³/min
|
17.45454
gal/s
|
150
ft³/min
|
18.70129
gal/s
|
160
ft³/min
|
19.94804
gal/s
|
170
ft³/min
|
21.19479
gal/s
|
180
ft³/min
|
22.44155
gal/s
|
190
ft³/min
|
23.6883
gal/s
|
200
ft³/min
|
24.93505
gal/s
|
210
ft³/min
|
26.1818
gal/s
|
220
ft³/min
|
27.42856
gal/s
|
230
ft³/min
|
28.67531
gal/s
|
240
ft³/min
|
29.92206
gal/s
|
250
ft³/min
|
31.16882
gal/s
|
260
ft³/min
|
32.41557
gal/s
|
270
ft³/min
|
33.66232
gal/s
|
280
ft³/min
|
34.90907
gal/s
|
290
ft³/min
|
36.15583
gal/s
|
300
ft³/min
|
37.40258
gal/s
|
310
ft³/min
|
38.64933
gal/s
|
320
ft³/min
|
39.89608
gal/s
|
330
ft³/min
|
41.14284
gal/s
|
340
ft³/min
|
42.38959
gal/s
|
350
ft³/min
|
43.63634
gal/s
|
360
ft³/min
|
44.88309
gal/s
|
370
ft³/min
|
46.12985
gal/s
|
380
ft³/min
|
47.3766
gal/s
|
390
ft³/min
|
48.62335
gal/s
|
400
ft³/min
|
49.8701
gal/s
|
410
ft³/min
|
51.11686
gal/s
|
420
ft³/min
|
52.36361
gal/s
|
430
ft³/min
|
53.61036
gal/s
|
440
ft³/min
|
54.85711
gal/s
|
450
ft³/min
|
56.10387
gal/s
|
460
ft³/min
|
57.35062
gal/s
|
470
ft³/min
|
58.59737
gal/s
|
480
ft³/min
|
59.84413
gal/s
|
490
ft³/min
|
61.09088
gal/s
|
500
ft³/min
|
62.33763
gal/s
|
510
ft³/min
|
63.58438
gal/s
|
520
ft³/min
|
64.83114
gal/s
|
530
ft³/min
|
66.07789
gal/s
|
540
ft³/min
|
67.32464
gal/s
|
550
ft³/min
|
68.57139
gal/s
|
560
ft³/min
|
69.81815
gal/s
|
570
ft³/min
|
71.0649
gal/s
|
580
ft³/min
|
72.31165
gal/s
|
590
ft³/min
|
73.5584
gal/s
|
600
ft³/min
|
74.80516
gal/s
|
610
ft³/min
|
76.05191
gal/s
|
620
ft³/min
|
77.29866
gal/s
|
630
ft³/min
|
78.54541
gal/s
|
640
ft³/min
|
79.79217
gal/s
|
650
ft³/min
|
81.03892
gal/s
|
660
ft³/min
|
82.28567
gal/s
|
670
ft³/min
|
83.53242
gal/s
|
680
ft³/min
|
84.77918
gal/s
|
690
ft³/min
|
86.02593
gal/s
|
700
ft³/min
|
87.27268
gal/s
|
710
ft³/min
|
88.51943
gal/s
|
720
ft³/min
|
89.76619
gal/s
|
730
ft³/min
|
91.01294
gal/s
|
740
ft³/min
|
92.25969
gal/s
|
750
ft³/min
|
93.50645
gal/s
|
760
ft³/min
|
94.7532
gal/s
|
770
ft³/min
|
96
gal/s
|
780
ft³/min
|
97.2467
gal/s
|
790
ft³/min
|
98.49346
gal/s
|
800
ft³/min
|
99.74021
gal/s
|
810
ft³/min
|
100.98696
gal/s
|
820
ft³/min
|
102.23371
gal/s
|
830
ft³/min
|
103.48047
gal/s
|
840
ft³/min
|
104.72722
gal/s
|
850
ft³/min
|
105.97397
gal/s
|
860
ft³/min
|
107.22072
gal/s
|
870
ft³/min
|
108.46748
gal/s
|
880
ft³/min
|
109.71423
gal/s
|
890
ft³/min
|
110.96098
gal/s
|
900
ft³/min
|
112.20773
gal/s
|
910
ft³/min
|
113.45449
gal/s
|
920
ft³/min
|
114.70124
gal/s
|
930
ft³/min
|
115.94799
gal/s
|
940
ft³/min
|
117.19474
gal/s
|
950
ft³/min
|
118.4415
gal/s
|
960
ft³/min
|
119.68825
gal/s
|
970
ft³/min
|
120.935
gal/s
|
980
ft³/min
|
122.18176
gal/s
|
990
ft³/min
|
123.42851
gal/s
|
1000
ft³/min
|
124.67526
gal/s
|
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