The “Litre per second” (L/s) is a crucial unit in fluid dynamics, representing the flow rate of liquids. It is widely used in engineering, hydrology, and environmental science to measure water consumption, irrigation, and sewage treatment. For instance, high-performance showerheads can have flow rates approaching 0.1 to 0.2 L/s, translating to a refreshing and efficient bath.
In larger applications, such as hydroelectric plants, turbines can handle thousands of litres per second to generate energy, showcasing how scale affects its utility. The versatility of the L/s unit enables precise calculations and planning, crucial for managing water resources in a world where sustainability is paramount. Understanding flow rates can optimize resource use, conserving water and energy in both household and industrial environments.
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.
| Litres per second | Cubic feet per minute |
|---|---|
0
l/s
|
0
ft³/min
|
1
l/s
|
2.11888
ft³/min
|
2
l/s
|
4.23776
ft³/min
|
3
l/s
|
6.35664
ft³/min
|
4
l/s
|
8.47552
ft³/min
|
5
l/s
|
10.59441
ft³/min
|
6
l/s
|
12.71329
ft³/min
|
7
l/s
|
14.83217
ft³/min
|
8
l/s
|
16.95105
ft³/min
|
9
l/s
|
19.06993
ft³/min
|
10
l/s
|
21.18881
ft³/min
|
11
l/s
|
23.30769
ft³/min
|
12
l/s
|
25.42657
ft³/min
|
13
l/s
|
27.54545
ft³/min
|
14
l/s
|
29.66434
ft³/min
|
15
l/s
|
31.78322
ft³/min
|
16
l/s
|
33.9021
ft³/min
|
17
l/s
|
36.02098
ft³/min
|
18
l/s
|
38.13986
ft³/min
|
19
l/s
|
40.25874
ft³/min
|
20
l/s
|
42.37762
ft³/min
|
21
l/s
|
44.4965
ft³/min
|
22
l/s
|
46.61538
ft³/min
|
23
l/s
|
48.73427
ft³/min
|
24
l/s
|
50.85315
ft³/min
|
25
l/s
|
52.97203
ft³/min
|
26
l/s
|
55.09091
ft³/min
|
27
l/s
|
57.20979
ft³/min
|
28
l/s
|
59.32867
ft³/min
|
29
l/s
|
61.44755
ft³/min
|
30
l/s
|
63.56643
ft³/min
|
31
l/s
|
65.68531
ft³/min
|
32
l/s
|
67.8042
ft³/min
|
33
l/s
|
69.92308
ft³/min
|
34
l/s
|
72.04196
ft³/min
|
35
l/s
|
74.16084
ft³/min
|
36
l/s
|
76.27972
ft³/min
|
37
l/s
|
78.3986
ft³/min
|
38
l/s
|
80.51748
ft³/min
|
39
l/s
|
82.63636
ft³/min
|
40
l/s
|
84.75524
ft³/min
|
41
l/s
|
86.87412
ft³/min
|
42
l/s
|
88.99301
ft³/min
|
43
l/s
|
91.11189
ft³/min
|
44
l/s
|
93.23077
ft³/min
|
45
l/s
|
95.34965
ft³/min
|
46
l/s
|
97.46853
ft³/min
|
47
l/s
|
99.58741
ft³/min
|
48
l/s
|
101.70629
ft³/min
|
49
l/s
|
103.82517
ft³/min
|
50
l/s
|
105.94405
ft³/min
|
51
l/s
|
108.06294
ft³/min
|
52
l/s
|
110.18182
ft³/min
|
53
l/s
|
112.3007
ft³/min
|
54
l/s
|
114.41958
ft³/min
|
55
l/s
|
116.53846
ft³/min
|
56
l/s
|
118.65734
ft³/min
|
57
l/s
|
120.77622
ft³/min
|
58
l/s
|
122.8951
ft³/min
|
59
l/s
|
125.01398
ft³/min
|
60
l/s
|
127.13287
ft³/min
|
61
l/s
|
129.25175
ft³/min
|
62
l/s
|
131.37063
ft³/min
|
63
l/s
|
133.48951
ft³/min
|
64
l/s
|
135.60839
ft³/min
|
65
l/s
|
137.72727
ft³/min
|
66
l/s
|
139.84615
ft³/min
|
67
l/s
|
141.96503
ft³/min
|
68
l/s
|
144.08391
ft³/min
|
69
l/s
|
146.2028
ft³/min
|
70
l/s
|
148.32168
ft³/min
|
71
l/s
|
150.44056
ft³/min
|
72
l/s
|
152.55944
ft³/min
|
73
l/s
|
154.67832
ft³/min
|
74
l/s
|
156.7972
ft³/min
|
75
l/s
|
158.91608
ft³/min
|
76
l/s
|
161.03496
ft³/min
|
77
l/s
|
163.15384
ft³/min
|
78
l/s
|
165.27273
ft³/min
|
79
l/s
|
167.39161
ft³/min
|
80
l/s
|
169.51049
ft³/min
|
81
l/s
|
171.62937
ft³/min
|
82
l/s
|
173.74825
ft³/min
|
83
l/s
|
175.86713
ft³/min
|
84
l/s
|
177.98601
ft³/min
|
85
l/s
|
180.10489
ft³/min
|
86
l/s
|
182.22377
ft³/min
|
87
l/s
|
184.34266
ft³/min
|
88
l/s
|
186.46154
ft³/min
|
89
l/s
|
188.58042
ft³/min
|
90
l/s
|
190.6993
ft³/min
|
91
l/s
|
192.81818
ft³/min
|
92
l/s
|
194.93706
ft³/min
|
93
l/s
|
197.05594
ft³/min
|
94
l/s
|
199.17482
ft³/min
|
95
l/s
|
201.2937
ft³/min
|
96
l/s
|
203.41259
ft³/min
|
97
l/s
|
205.53147
ft³/min
|
98
l/s
|
207.65035
ft³/min
|
99
l/s
|
209.76923
ft³/min
|
100
l/s
|
211.88811
ft³/min
|
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