Litre per minute (L/min) is a versatile unit commonly used to measure fluid flow rate, especially in medical, engineering, and ecological contexts. For instance, in healthcare, oxygen delivery is typically measured in litres per minute, with high-flow systems delivering up to 15 L/min to aid patients with respiratory issues. In the world of engineering, especially when dealing with pumps and water devices, understanding flow rates in L/min is critical to ensuring efficient system performance and resource management.
Interestingly, measuring river flow in smaller streams also uses this unit. Understanding flow rates here is vital for environmental studies, revealing river health and predicting events like floods. Such diverse applications of litres per minute illustrate its essential role in both safeguarding human health and monitoring environmental ecosystems.
A cubic foot per second (cfs) is a unit of flow rate that describes the volume of water or other fluids moving past a point every second. It is commonly used in hydrology to measure rivers and streams, providing insight into water availability and flood prediction. To put it in perspective, one cubic foot per second is equivalent to 7.48 gallons per second. Thus, a modest stream might flow at several tens of cfs, while larger rivers, such as the Mississippi, can exceed 500,000 cfs!
Interestingly, this unit has historical significance dating back to the early days of water management, where it played a crucial role in the development of infrastructure for agriculture and urban planning, influencing patterns of settlement and economic development around the world.
| Litres per minute | Cubic feet per second |
|---|---|
0
l/min
|
0
ft³/s
|
10
l/min
|
0.00588578
ft³/s
|
20
l/min
|
0.0117716
ft³/s
|
30
l/min
|
0.0176573
ft³/s
|
40
l/min
|
0.0235431
ft³/s
|
50
l/min
|
0.0294289
ft³/s
|
60
l/min
|
0.0353147
ft³/s
|
70
l/min
|
0.0412005
ft³/s
|
80
l/min
|
0.0470862
ft³/s
|
90
l/min
|
0.052972
ft³/s
|
100
l/min
|
0.0588578
ft³/s
|
110
l/min
|
0.0647436
ft³/s
|
120
l/min
|
0.0706294
ft³/s
|
130
l/min
|
0.0765152
ft³/s
|
140
l/min
|
0.0824009
ft³/s
|
150
l/min
|
0.0882867
ft³/s
|
160
l/min
|
0.0941725
ft³/s
|
170
l/min
|
0.100058
ft³/s
|
180
l/min
|
0.105944
ft³/s
|
190
l/min
|
0.11183
ft³/s
|
200
l/min
|
0.117716
ft³/s
|
210
l/min
|
0.123601
ft³/s
|
220
l/min
|
0.129487
ft³/s
|
230
l/min
|
0.135373
ft³/s
|
240
l/min
|
0.141259
ft³/s
|
250
l/min
|
0.147145
ft³/s
|
260
l/min
|
0.15303
ft³/s
|
270
l/min
|
0.158916
ft³/s
|
280
l/min
|
0.164802
ft³/s
|
290
l/min
|
0.170688
ft³/s
|
300
l/min
|
0.176573
ft³/s
|
310
l/min
|
0.182459
ft³/s
|
320
l/min
|
0.188345
ft³/s
|
330
l/min
|
0.194231
ft³/s
|
340
l/min
|
0.200117
ft³/s
|
350
l/min
|
0.206002
ft³/s
|
360
l/min
|
0.211888
ft³/s
|
370
l/min
|
0.217774
ft³/s
|
380
l/min
|
0.22366
ft³/s
|
390
l/min
|
0.229545
ft³/s
|
400
l/min
|
0.235431
ft³/s
|
410
l/min
|
0.241317
ft³/s
|
420
l/min
|
0.247203
ft³/s
|
430
l/min
|
0.253089
ft³/s
|
440
l/min
|
0.258974
ft³/s
|
450
l/min
|
0.26486
ft³/s
|
460
l/min
|
0.270746
ft³/s
|
470
l/min
|
0.276632
ft³/s
|
480
l/min
|
0.282517
ft³/s
|
490
l/min
|
0.288403
ft³/s
|
500
l/min
|
0.294289
ft³/s
|
510
l/min
|
0.300175
ft³/s
|
520
l/min
|
0.306061
ft³/s
|
530
l/min
|
0.311946
ft³/s
|
540
l/min
|
0.317832
ft³/s
|
550
l/min
|
0.323718
ft³/s
|
560
l/min
|
0.329604
ft³/s
|
570
l/min
|
0.33549
ft³/s
|
580
l/min
|
0.341375
ft³/s
|
590
l/min
|
0.347261
ft³/s
|
600
l/min
|
0.353147
ft³/s
|
610
l/min
|
0.359033
ft³/s
|
620
l/min
|
0.364918
ft³/s
|
630
l/min
|
0.370804
ft³/s
|
640
l/min
|
0.37669
ft³/s
|
650
l/min
|
0.382576
ft³/s
|
660
l/min
|
0.388462
ft³/s
|
670
l/min
|
0.394347
ft³/s
|
680
l/min
|
0.400233
ft³/s
|
690
l/min
|
0.406119
ft³/s
|
700
l/min
|
0.412005
ft³/s
|
710
l/min
|
0.41789
ft³/s
|
720
l/min
|
0.423776
ft³/s
|
730
l/min
|
0.429662
ft³/s
|
740
l/min
|
0.435548
ft³/s
|
750
l/min
|
0.441434
ft³/s
|
760
l/min
|
0.447319
ft³/s
|
770
l/min
|
0.453205
ft³/s
|
780
l/min
|
0.459091
ft³/s
|
790
l/min
|
0.464977
ft³/s
|
800
l/min
|
0.470862
ft³/s
|
810
l/min
|
0.476748
ft³/s
|
820
l/min
|
0.482634
ft³/s
|
830
l/min
|
0.48852
ft³/s
|
840
l/min
|
0.494406
ft³/s
|
850
l/min
|
0.500291
ft³/s
|
860
l/min
|
0.506177
ft³/s
|
870
l/min
|
0.512063
ft³/s
|
880
l/min
|
0.517949
ft³/s
|
890
l/min
|
0.523834
ft³/s
|
900
l/min
|
0.52972
ft³/s
|
910
l/min
|
0.535606
ft³/s
|
920
l/min
|
0.541492
ft³/s
|
930
l/min
|
0.547378
ft³/s
|
940
l/min
|
0.553263
ft³/s
|
950
l/min
|
0.559149
ft³/s
|
960
l/min
|
0.565035
ft³/s
|
970
l/min
|
0.570921
ft³/s
|
980
l/min
|
0.576807
ft³/s
|
990
l/min
|
0.582692
ft³/s
|
1000
l/min
|
0.588578
ft³/s
|
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