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 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.
Cubic feet per minute | Gallons per minute |
---|---|
0
ft³/min
|
0
gal/min
|
10
ft³/min
|
74.80516
gal/min
|
20
ft³/min
|
149.61031
gal/min
|
30
ft³/min
|
224.41547
gal/min
|
40
ft³/min
|
299.22063
gal/min
|
50
ft³/min
|
374.02578
gal/min
|
60
ft³/min
|
448.83094
gal/min
|
70
ft³/min
|
523.63609
gal/min
|
80
ft³/min
|
598.44125
gal/min
|
90
ft³/min
|
673.24641
gal/min
|
100
ft³/min
|
748.05156
gal/min
|
110
ft³/min
|
822.85672
gal/min
|
120
ft³/min
|
897.66188
gal/min
|
130
ft³/min
|
972.46703
gal/min
|
140
ft³/min
|
1047.27219
gal/min
|
150
ft³/min
|
1122.07734
gal/min
|
160
ft³/min
|
1196.8825
gal/min
|
170
ft³/min
|
1271.68766
gal/min
|
180
ft³/min
|
1346.49281
gal/min
|
190
ft³/min
|
1421.29797
gal/min
|
200
ft³/min
|
1496.10313
gal/min
|
210
ft³/min
|
1570.90828
gal/min
|
220
ft³/min
|
1645.71344
gal/min
|
230
ft³/min
|
1720.51859
gal/min
|
240
ft³/min
|
1795.32375
gal/min
|
250
ft³/min
|
1870.12891
gal/min
|
260
ft³/min
|
1944.93406
gal/min
|
270
ft³/min
|
2019.73922
gal/min
|
280
ft³/min
|
2094.54438
gal/min
|
290
ft³/min
|
2169.34953
gal/min
|
300
ft³/min
|
2244.15469
gal/min
|
310
ft³/min
|
2318.95984
gal/min
|
320
ft³/min
|
2393.765
gal/min
|
330
ft³/min
|
2468.57016
gal/min
|
340
ft³/min
|
2543.37531
gal/min
|
350
ft³/min
|
2618.18047
gal/min
|
360
ft³/min
|
2692.98563
gal/min
|
370
ft³/min
|
2767.79078
gal/min
|
380
ft³/min
|
2842.59594
gal/min
|
390
ft³/min
|
2917.40109
gal/min
|
400
ft³/min
|
2992.20625
gal/min
|
410
ft³/min
|
3067.01141
gal/min
|
420
ft³/min
|
3141.81656
gal/min
|
430
ft³/min
|
3216.62172
gal/min
|
440
ft³/min
|
3291.42688
gal/min
|
450
ft³/min
|
3366.23203
gal/min
|
460
ft³/min
|
3441.03719
gal/min
|
470
ft³/min
|
3515.84234
gal/min
|
480
ft³/min
|
3590.6475
gal/min
|
490
ft³/min
|
3665.45266
gal/min
|
500
ft³/min
|
3740.25781
gal/min
|
510
ft³/min
|
3815.06297
gal/min
|
520
ft³/min
|
3889.86813
gal/min
|
530
ft³/min
|
3964.67328
gal/min
|
540
ft³/min
|
4039.47844
gal/min
|
550
ft³/min
|
4114.28359
gal/min
|
560
ft³/min
|
4189.08875
gal/min
|
570
ft³/min
|
4263.89391
gal/min
|
580
ft³/min
|
4338.69906
gal/min
|
590
ft³/min
|
4413.50422
gal/min
|
600
ft³/min
|
4488.30938
gal/min
|
610
ft³/min
|
4563.11453
gal/min
|
620
ft³/min
|
4637.91969
gal/min
|
630
ft³/min
|
4712.72484
gal/min
|
640
ft³/min
|
4787.53
gal/min
|
650
ft³/min
|
4862.33516
gal/min
|
660
ft³/min
|
4937.14031
gal/min
|
670
ft³/min
|
5011.94547
gal/min
|
680
ft³/min
|
5086.75063
gal/min
|
690
ft³/min
|
5161.55578
gal/min
|
700
ft³/min
|
5236.36094
gal/min
|
710
ft³/min
|
5311.16609
gal/min
|
720
ft³/min
|
5385.97125
gal/min
|
730
ft³/min
|
5460.77641
gal/min
|
740
ft³/min
|
5535.58156
gal/min
|
750
ft³/min
|
5610.38672
gal/min
|
760
ft³/min
|
5685.19188
gal/min
|
770
ft³/min
|
5759.99703
gal/min
|
780
ft³/min
|
5834.80219
gal/min
|
790
ft³/min
|
5909.60734
gal/min
|
800
ft³/min
|
5984.4125
gal/min
|
810
ft³/min
|
6059.21766
gal/min
|
820
ft³/min
|
6134.02281
gal/min
|
830
ft³/min
|
6208.82797
gal/min
|
840
ft³/min
|
6283.63313
gal/min
|
850
ft³/min
|
6358.43828
gal/min
|
860
ft³/min
|
6433.24344
gal/min
|
870
ft³/min
|
6508.04859
gal/min
|
880
ft³/min
|
6582.85375
gal/min
|
890
ft³/min
|
6657.65891
gal/min
|
900
ft³/min
|
6732.46406
gal/min
|
910
ft³/min
|
6807.26922
gal/min
|
920
ft³/min
|
6882.07438
gal/min
|
930
ft³/min
|
6956.87953
gal/min
|
940
ft³/min
|
7031.68469
gal/min
|
950
ft³/min
|
7106.48984
gal/min
|
960
ft³/min
|
7181.295
gal/min
|
970
ft³/min
|
7256.10016
gal/min
|
980
ft³/min
|
7330.90531
gal/min
|
990
ft³/min
|
7405.71047
gal/min
|
1000
ft³/min
|
7480.51563
gal/min
|
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