The cubic inch per second (in³/s) might seem like an obscure unit, but it plays a crucial role in various engineering and fluid dynamics applications. This unit measures volumetric flow rate, indicating how quickly a fluid moves through a system. While gallons or liters per minute might be more familiar, cubic inches per second offer precision in industries where small-scale fluid control is crucial, such as in microfluidics or precision-engineered machinery.
Intriguingly, the cubic inch, a prevalent measure in American automotive history, was key in defining engine sizes. Understanding flow rates in cubic inches per second can be vital when optimizing fuel or coolant systems in vintage cars. Its usage spans from classic car enthusiasts to cutting-edge technology in industrial systems, making it both historically significant and essential in modern engineering contexts.
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.
| Cubic inches per second | Cubic feet per second |
|---|---|
0
in³/s
|
0
ft³/s
|
10
in³/s
|
0.00578701
ft³/s
|
20
in³/s
|
0.011574
ft³/s
|
30
in³/s
|
0.017361
ft³/s
|
40
in³/s
|
0.0231481
ft³/s
|
50
in³/s
|
0.0289351
ft³/s
|
60
in³/s
|
0.0347221
ft³/s
|
70
in³/s
|
0.0405091
ft³/s
|
80
in³/s
|
0.0462961
ft³/s
|
90
in³/s
|
0.0520831
ft³/s
|
100
in³/s
|
0.0578701
ft³/s
|
110
in³/s
|
0.0636571
ft³/s
|
120
in³/s
|
0.0694442
ft³/s
|
130
in³/s
|
0.0752312
ft³/s
|
140
in³/s
|
0.0810182
ft³/s
|
150
in³/s
|
0.0868052
ft³/s
|
160
in³/s
|
0.0925922
ft³/s
|
170
in³/s
|
0.0983792
ft³/s
|
180
in³/s
|
0.104166
ft³/s
|
190
in³/s
|
0.109953
ft³/s
|
200
in³/s
|
0.11574
ft³/s
|
210
in³/s
|
0.121527
ft³/s
|
220
in³/s
|
0.127314
ft³/s
|
230
in³/s
|
0.133101
ft³/s
|
240
in³/s
|
0.138888
ft³/s
|
250
in³/s
|
0.144675
ft³/s
|
260
in³/s
|
0.150462
ft³/s
|
270
in³/s
|
0.156249
ft³/s
|
280
in³/s
|
0.162036
ft³/s
|
290
in³/s
|
0.167823
ft³/s
|
300
in³/s
|
0.17361
ft³/s
|
310
in³/s
|
0.179397
ft³/s
|
320
in³/s
|
0.185184
ft³/s
|
330
in³/s
|
0.190971
ft³/s
|
340
in³/s
|
0.196758
ft³/s
|
350
in³/s
|
0.202545
ft³/s
|
360
in³/s
|
0.208332
ft³/s
|
370
in³/s
|
0.214119
ft³/s
|
380
in³/s
|
0.219907
ft³/s
|
390
in³/s
|
0.225694
ft³/s
|
400
in³/s
|
0.231481
ft³/s
|
410
in³/s
|
0.237268
ft³/s
|
420
in³/s
|
0.243055
ft³/s
|
430
in³/s
|
0.248842
ft³/s
|
440
in³/s
|
0.254629
ft³/s
|
450
in³/s
|
0.260416
ft³/s
|
460
in³/s
|
0.266203
ft³/s
|
470
in³/s
|
0.27199
ft³/s
|
480
in³/s
|
0.277777
ft³/s
|
490
in³/s
|
0.283564
ft³/s
|
500
in³/s
|
0.289351
ft³/s
|
510
in³/s
|
0.295138
ft³/s
|
520
in³/s
|
0.300925
ft³/s
|
530
in³/s
|
0.306712
ft³/s
|
540
in³/s
|
0.312499
ft³/s
|
550
in³/s
|
0.318286
ft³/s
|
560
in³/s
|
0.324073
ft³/s
|
570
in³/s
|
0.32986
ft³/s
|
580
in³/s
|
0.335647
ft³/s
|
590
in³/s
|
0.341434
ft³/s
|
600
in³/s
|
0.347221
ft³/s
|
610
in³/s
|
0.353008
ft³/s
|
620
in³/s
|
0.358795
ft³/s
|
630
in³/s
|
0.364582
ft³/s
|
640
in³/s
|
0.370369
ft³/s
|
650
in³/s
|
0.376156
ft³/s
|
660
in³/s
|
0.381943
ft³/s
|
670
in³/s
|
0.38773
ft³/s
|
680
in³/s
|
0.393517
ft³/s
|
690
in³/s
|
0.399304
ft³/s
|
700
in³/s
|
0.405091
ft³/s
|
710
in³/s
|
0.410878
ft³/s
|
720
in³/s
|
0.416665
ft³/s
|
730
in³/s
|
0.422452
ft³/s
|
740
in³/s
|
0.428239
ft³/s
|
750
in³/s
|
0.434026
ft³/s
|
760
in³/s
|
0.439813
ft³/s
|
770
in³/s
|
0.4456
ft³/s
|
780
in³/s
|
0.451387
ft³/s
|
790
in³/s
|
0.457174
ft³/s
|
800
in³/s
|
0.462961
ft³/s
|
810
in³/s
|
0.468748
ft³/s
|
820
in³/s
|
0.474535
ft³/s
|
830
in³/s
|
0.480322
ft³/s
|
840
in³/s
|
0.486109
ft³/s
|
850
in³/s
|
0.491896
ft³/s
|
860
in³/s
|
0.497683
ft³/s
|
870
in³/s
|
0.50347
ft³/s
|
880
in³/s
|
0.509257
ft³/s
|
890
in³/s
|
0.515044
ft³/s
|
900
in³/s
|
0.520831
ft³/s
|
910
in³/s
|
0.526618
ft³/s
|
920
in³/s
|
0.532405
ft³/s
|
930
in³/s
|
0.538192
ft³/s
|
940
in³/s
|
0.543979
ft³/s
|
950
in³/s
|
0.549766
ft³/s
|
960
in³/s
|
0.555553
ft³/s
|
970
in³/s
|
0.56134
ft³/s
|
980
in³/s
|
0.567127
ft³/s
|
990
in³/s
|
0.572914
ft³/s
|
1000
in³/s
|
0.578701
ft³/s
|
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