Pound-force is a fascinating unit that merges the concept of mass and gravity, rooted deeply in the imperial system. It represents the force exerted by gravity on a one-pound object at the Earth’s surface. Interestingly, the distinction between pound-force and pound-mass became vital as precision in science and engineering increased, leading to the creation of a standard gravitational constant. Unlike the pound used for weight, pound-force considers the acceleration due to gravity, approximately 32.174 ft/s², offering a glimpse into how we measure force beyond just mass.
In practical terms, the concept of pound-force is woven into everyday life, particularly in the United States, where the imperial system is prevalent. For example, when you hear that a tire is inflated to 30 psi (pounds per square inch), those “pounds” refer to pound-force. Understanding this unit gives an insight into how force impacts our daily mechanics, from vehicle dynamics to the tension in a bridge cable, illustrating the omnipresence of physics in our bustling world.
A kilonewton (kN) is a unit of force equal to 1,000 newtons. While the newton is the standard unit of force in the International System of Units (SI), the kilonewton is commonly used in engineering to describe loads and forces in large-scale applications like bridges and buildings. For context, a kilonewton is roughly equivalent to the gravitational force exerted by a mass of 102 kilograms on Earth. This makes it a practical unit for engineers when designing structures to withstand specific weights.
In everyday scenarios, a kilonewton is impressive because it can move substantial objects. For example, a skilled rugby player exerting maximum effort in a scrum generates around one kilonewton of force. This measurement illustrates how powerful this unit is in physical terms, giving you a glimpse of the colossal forces managed in various fields of engineering and physics.
Pound-forces | Kilonewtons |
---|---|
0
lbf
|
0
kN
|
10
lbf
|
0.0444822
kN
|
20
lbf
|
0.0889644
kN
|
30
lbf
|
0.133447
kN
|
40
lbf
|
0.177929
kN
|
50
lbf
|
0.222411
kN
|
60
lbf
|
0.266893
kN
|
70
lbf
|
0.311375
kN
|
80
lbf
|
0.355858
kN
|
90
lbf
|
0.40034
kN
|
100
lbf
|
0.444822
kN
|
110
lbf
|
0.489304
kN
|
120
lbf
|
0.533786
kN
|
130
lbf
|
0.578269
kN
|
140
lbf
|
0.622751
kN
|
150
lbf
|
0.667233
kN
|
160
lbf
|
0.711715
kN
|
170
lbf
|
0.756197
kN
|
180
lbf
|
0.80068
kN
|
190
lbf
|
0.845162
kN
|
200
lbf
|
0.889644
kN
|
210
lbf
|
0.934126
kN
|
220
lbf
|
0.978608
kN
|
230
lbf
|
1.02309
kN
|
240
lbf
|
1.06757
kN
|
250
lbf
|
1.11206
kN
|
260
lbf
|
1.15654
kN
|
270
lbf
|
1.20102
kN
|
280
lbf
|
1.2455
kN
|
290
lbf
|
1.28998
kN
|
300
lbf
|
1.33447
kN
|
310
lbf
|
1.37895
kN
|
320
lbf
|
1.42343
kN
|
330
lbf
|
1.46791
kN
|
340
lbf
|
1.51239
kN
|
350
lbf
|
1.55688
kN
|
360
lbf
|
1.60136
kN
|
370
lbf
|
1.64584
kN
|
380
lbf
|
1.69032
kN
|
390
lbf
|
1.73481
kN
|
400
lbf
|
1.77929
kN
|
410
lbf
|
1.82377
kN
|
420
lbf
|
1.86825
kN
|
430
lbf
|
1.91273
kN
|
440
lbf
|
1.95722
kN
|
450
lbf
|
2.0017
kN
|
460
lbf
|
2.04618
kN
|
470
lbf
|
2.09066
kN
|
480
lbf
|
2.13515
kN
|
490
lbf
|
2.17963
kN
|
500
lbf
|
2.22411
kN
|
510
lbf
|
2.26859
kN
|
520
lbf
|
2.31307
kN
|
530
lbf
|
2.35756
kN
|
540
lbf
|
2.40204
kN
|
550
lbf
|
2.44652
kN
|
560
lbf
|
2.491
kN
|
570
lbf
|
2.53549
kN
|
580
lbf
|
2.57997
kN
|
590
lbf
|
2.62445
kN
|
600
lbf
|
2.66893
kN
|
610
lbf
|
2.71341
kN
|
620
lbf
|
2.7579
kN
|
630
lbf
|
2.80238
kN
|
640
lbf
|
2.84686
kN
|
650
lbf
|
2.89134
kN
|
660
lbf
|
2.93583
kN
|
670
lbf
|
2.98031
kN
|
680
lbf
|
3.02479
kN
|
690
lbf
|
3.06927
kN
|
700
lbf
|
3.11375
kN
|
710
lbf
|
3.15824
kN
|
720
lbf
|
3.20272
kN
|
730
lbf
|
3.2472
kN
|
740
lbf
|
3.29168
kN
|
750
lbf
|
3.33617
kN
|
760
lbf
|
3.38065
kN
|
770
lbf
|
3.42513
kN
|
780
lbf
|
3.46961
kN
|
790
lbf
|
3.51409
kN
|
800
lbf
|
3.55858
kN
|
810
lbf
|
3.60306
kN
|
820
lbf
|
3.64754
kN
|
830
lbf
|
3.69202
kN
|
840
lbf
|
3.7365
kN
|
850
lbf
|
3.78099
kN
|
860
lbf
|
3.82547
kN
|
870
lbf
|
3.86995
kN
|
880
lbf
|
3.91443
kN
|
890
lbf
|
3.95892
kN
|
900
lbf
|
4.0034
kN
|
910
lbf
|
4.04788
kN
|
920
lbf
|
4.09236
kN
|
930
lbf
|
4.13684
kN
|
940
lbf
|
4.18133
kN
|
950
lbf
|
4.22581
kN
|
960
lbf
|
4.27029
kN
|
970
lbf
|
4.31477
kN
|
980
lbf
|
4.35926
kN
|
990
lbf
|
4.40374
kN
|
1000
lbf
|
4.44822
kN
|
Conversion | Call to Action |
---|---|
Pound-forces to Newtons | Go to converter |
Pound-forces to Kilogram-forces | Go to converter |
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