The kilogram-force (kgf) is a fascinating unit of force that originates from the gravitational pull exerted on a mass of one kilogram at Earth’s surface. Though it’s not a part of the International System of Units, it has historical significance in fields such as engineering and physics. One kilogram-force is equivalent to approximately 9.80665 newtons, reflecting the acceleration due to Earth’s gravity at sea level.
Interestingly, the concept of kilogram-force harkens back to times when engineers needed a more intuitive way to express force without delving into the complexities of the then-emerging newtons. Its use has diminished with the universal adoption of newtons, but it still appears in various legacy systems and specific applications, especially in countries that historically avoided metrication.
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.
Kilogram-forces | Kilonewtons |
---|---|
0
kgf
|
0
kN
|
1
kgf
|
0.009807
kN
|
2
kgf
|
0.019614
kN
|
3
kgf
|
0.029421
kN
|
4
kgf
|
0.039228
kN
|
5
kgf
|
0.049035
kN
|
6
kgf
|
0.058842
kN
|
7
kgf
|
0.068649
kN
|
8
kgf
|
0.078456
kN
|
9
kgf
|
0.088263
kN
|
10
kgf
|
0.09807
kN
|
11
kgf
|
0.107877
kN
|
12
kgf
|
0.117684
kN
|
13
kgf
|
0.127491
kN
|
14
kgf
|
0.137298
kN
|
15
kgf
|
0.147105
kN
|
16
kgf
|
0.156912
kN
|
17
kgf
|
0.166719
kN
|
18
kgf
|
0.176526
kN
|
19
kgf
|
0.186333
kN
|
20
kgf
|
0.19614
kN
|
21
kgf
|
0.205947
kN
|
22
kgf
|
0.215754
kN
|
23
kgf
|
0.225561
kN
|
24
kgf
|
0.235368
kN
|
25
kgf
|
0.245175
kN
|
26
kgf
|
0.254982
kN
|
27
kgf
|
0.264789
kN
|
28
kgf
|
0.274596
kN
|
29
kgf
|
0.284403
kN
|
30
kgf
|
0.29421
kN
|
31
kgf
|
0.304017
kN
|
32
kgf
|
0.313824
kN
|
33
kgf
|
0.323631
kN
|
34
kgf
|
0.333438
kN
|
35
kgf
|
0.343245
kN
|
36
kgf
|
0.353052
kN
|
37
kgf
|
0.362859
kN
|
38
kgf
|
0.372666
kN
|
39
kgf
|
0.382473
kN
|
40
kgf
|
0.39228
kN
|
41
kgf
|
0.402087
kN
|
42
kgf
|
0.411894
kN
|
43
kgf
|
0.421701
kN
|
44
kgf
|
0.431508
kN
|
45
kgf
|
0.441315
kN
|
46
kgf
|
0.451122
kN
|
47
kgf
|
0.460929
kN
|
48
kgf
|
0.470736
kN
|
49
kgf
|
0.480543
kN
|
50
kgf
|
0.49035
kN
|
51
kgf
|
0.500157
kN
|
52
kgf
|
0.509964
kN
|
53
kgf
|
0.519771
kN
|
54
kgf
|
0.529578
kN
|
55
kgf
|
0.539385
kN
|
56
kgf
|
0.549192
kN
|
57
kgf
|
0.558999
kN
|
58
kgf
|
0.568806
kN
|
59
kgf
|
0.578613
kN
|
60
kgf
|
0.58842
kN
|
61
kgf
|
0.598227
kN
|
62
kgf
|
0.608034
kN
|
63
kgf
|
0.617841
kN
|
64
kgf
|
0.627648
kN
|
65
kgf
|
0.637455
kN
|
66
kgf
|
0.647262
kN
|
67
kgf
|
0.657069
kN
|
68
kgf
|
0.666876
kN
|
69
kgf
|
0.676683
kN
|
70
kgf
|
0.68649
kN
|
71
kgf
|
0.696297
kN
|
72
kgf
|
0.706104
kN
|
73
kgf
|
0.715911
kN
|
74
kgf
|
0.725718
kN
|
75
kgf
|
0.735525
kN
|
76
kgf
|
0.745332
kN
|
77
kgf
|
0.755139
kN
|
78
kgf
|
0.764946
kN
|
79
kgf
|
0.774753
kN
|
80
kgf
|
0.78456
kN
|
81
kgf
|
0.794367
kN
|
82
kgf
|
0.804174
kN
|
83
kgf
|
0.813981
kN
|
84
kgf
|
0.823788
kN
|
85
kgf
|
0.833595
kN
|
86
kgf
|
0.843402
kN
|
87
kgf
|
0.853209
kN
|
88
kgf
|
0.863016
kN
|
89
kgf
|
0.872823
kN
|
90
kgf
|
0.88263
kN
|
91
kgf
|
0.892437
kN
|
92
kgf
|
0.902244
kN
|
93
kgf
|
0.912051
kN
|
94
kgf
|
0.921858
kN
|
95
kgf
|
0.931665
kN
|
96
kgf
|
0.941472
kN
|
97
kgf
|
0.951279
kN
|
98
kgf
|
0.961086
kN
|
99
kgf
|
0.970893
kN
|
100
kgf
|
0.9807
kN
|
Conversion | Call to Action |
---|---|
Kilogram-forces to Newtons | Go to converter |
Kilogram-forces to Pound-forces | Go to converter |
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