Foot per minute (ft/min) is a fascinating unit of speed often used in specialized fields such as HVAC (heating, ventilation, and air conditioning) systems to measure airflow and in other engineering applications. Interestingly, the roots of this unit can be traced back to the historical origins of the foot as a measurement, which dates back to ancient Egypt where the “royal foot” was utilized. Over centuries, various civilizations have adopted and adapted the foot, leading to the version we use today.
While it might seem esoteric, ft/min is crucial for ensuring precise calibrations and ensuring optimal efficiency in engineering contexts. For example, it is heavily relied upon to ensure the right amount of air changes per hour in room ventilation, directly affecting air quality and energy efficiency. Understanding and utilizing this unit connects us to a broader narrative of measurement evolution and technical precision.
Kilometres per hour (km/h) is a widely used metric unit of speed, especially on roads and highways around the world. Interestingly, despite its global prevalence, the U.S. primarily uses miles per hour. However, km/h is the standard for most countries, offering a glimpse into global unity as it’s part of the International System of Units (SI). The history of speed limits tied to km/h is quite fascinating. The first speed limit laws, introduced in the United Kingdom in the 19th century, regulated horse-drawn carriages, long before motor vehicles were common. Today, km/h aids not only in measuring speed but also in showcasing technological advancements in transportation engineering as speeds increase with improved vehicle designs.
Feet per minute | Kilometres per hour |
---|---|
0
ft/min
|
0
km/h
|
10
ft/min
|
0.182879
km/h
|
20
ft/min
|
0.365759
km/h
|
30
ft/min
|
0.548638
km/h
|
40
ft/min
|
0.731518
km/h
|
50
ft/min
|
0.914397
km/h
|
60
ft/min
|
1.09728
km/h
|
70
ft/min
|
1.28016
km/h
|
80
ft/min
|
1.46304
km/h
|
90
ft/min
|
1.64591
km/h
|
100
ft/min
|
1.82879
km/h
|
110
ft/min
|
2.01167
km/h
|
120
ft/min
|
2.19455
km/h
|
130
ft/min
|
2.37743
km/h
|
140
ft/min
|
2.56031
km/h
|
150
ft/min
|
2.74319
km/h
|
160
ft/min
|
2.92607
km/h
|
170
ft/min
|
3.10895
km/h
|
180
ft/min
|
3.29183
km/h
|
190
ft/min
|
3.47471
km/h
|
200
ft/min
|
3.65759
km/h
|
210
ft/min
|
3.84047
km/h
|
220
ft/min
|
4.02335
km/h
|
230
ft/min
|
4.20623
km/h
|
240
ft/min
|
4.38911
km/h
|
250
ft/min
|
4.57199
km/h
|
260
ft/min
|
4.75486
km/h
|
270
ft/min
|
4.93774
km/h
|
280
ft/min
|
5.12062
km/h
|
290
ft/min
|
5.3035
km/h
|
300
ft/min
|
5.48638
km/h
|
310
ft/min
|
5.66926
km/h
|
320
ft/min
|
5.85214
km/h
|
330
ft/min
|
6.03502
km/h
|
340
ft/min
|
6.2179
km/h
|
350
ft/min
|
6.40078
km/h
|
360
ft/min
|
6.58366
km/h
|
370
ft/min
|
6.76654
km/h
|
380
ft/min
|
6.94942
km/h
|
390
ft/min
|
7.1323
km/h
|
400
ft/min
|
7.31518
km/h
|
410
ft/min
|
7.49806
km/h
|
420
ft/min
|
7.68094
km/h
|
430
ft/min
|
7.86381
km/h
|
440
ft/min
|
8.04669
km/h
|
450
ft/min
|
8.22957
km/h
|
460
ft/min
|
8.41245
km/h
|
470
ft/min
|
8.59533
km/h
|
480
ft/min
|
8.77821
km/h
|
490
ft/min
|
8.96109
km/h
|
500
ft/min
|
9.14397
km/h
|
510
ft/min
|
9.32685
km/h
|
520
ft/min
|
9.50973
km/h
|
530
ft/min
|
9.69261
km/h
|
540
ft/min
|
9.87549
km/h
|
550
ft/min
|
10.05837
km/h
|
560
ft/min
|
10.24125
km/h
|
570
ft/min
|
10.42413
km/h
|
580
ft/min
|
10.60701
km/h
|
590
ft/min
|
10.78989
km/h
|
600
ft/min
|
10.97276
km/h
|
610
ft/min
|
11.15564
km/h
|
620
ft/min
|
11.33852
km/h
|
630
ft/min
|
11.5214
km/h
|
640
ft/min
|
11.70428
km/h
|
650
ft/min
|
11.88716
km/h
|
660
ft/min
|
12.07004
km/h
|
670
ft/min
|
12.25292
km/h
|
680
ft/min
|
12.4358
km/h
|
690
ft/min
|
12.61868
km/h
|
700
ft/min
|
12.80156
km/h
|
710
ft/min
|
12.98444
km/h
|
720
ft/min
|
13.16732
km/h
|
730
ft/min
|
13.3502
km/h
|
740
ft/min
|
13.53308
km/h
|
750
ft/min
|
13.71596
km/h
|
760
ft/min
|
13.89884
km/h
|
770
ft/min
|
14.08171
km/h
|
780
ft/min
|
14.26459
km/h
|
790
ft/min
|
14.44747
km/h
|
800
ft/min
|
14.63035
km/h
|
810
ft/min
|
14.81323
km/h
|
820
ft/min
|
14.99611
km/h
|
830
ft/min
|
15.17899
km/h
|
840
ft/min
|
15.36187
km/h
|
850
ft/min
|
15.54475
km/h
|
860
ft/min
|
15.72763
km/h
|
870
ft/min
|
15.91051
km/h
|
880
ft/min
|
16.09339
km/h
|
890
ft/min
|
16.27627
km/h
|
900
ft/min
|
16.45915
km/h
|
910
ft/min
|
16.64203
km/h
|
920
ft/min
|
16.82491
km/h
|
930
ft/min
|
17.00779
km/h
|
940
ft/min
|
17.19066
km/h
|
950
ft/min
|
17.37354
km/h
|
960
ft/min
|
17.55642
km/h
|
970
ft/min
|
17.7393
km/h
|
980
ft/min
|
17.92218
km/h
|
990
ft/min
|
18.10506
km/h
|
1000
ft/min
|
18.28794
km/h
|
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