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The kilogram, the base unit of mass in the International System of Units (SI), has a fascinating history tied to a physical artifact. Until 2019, it was defined by Le Grand K, a platinum-iridium cylinder stored in a vault in France. However, even slight surface contamination or material wear could alter its mass. To ensure a more stable and universally consistent measure, the kilogram is now defined by the Planck constant—a fundamental constant of nature—using a Kibble balance. This revolutionary change marked a significant milestone in metrology and brings mass measurement into line with other SI units that are already defined by fundamental constants, rather than physical objects.

Did you know?

The pound, symbolized as “lb,” has an intriguing history that dates back to ancient Rome. The word “pound” originates from the Latin word “libra,” a unit used in Rome, which explains its abbreviation “lb.” The pound in England was first standardized in the 13th century as the Tower pound, which was later replaced by the more familiar Avoirdupois pound in 1959. This unit is still widely used in the United States and other countries as a measure of weight, equivalent to 16 ounces or approximately 453.592 grams.

The term “pound” is also used in currency, notably the British Pound Sterling, reflecting its historical association with a pound weight of silver. Interestingly, both uses of “pound” highlight its longstanding economic significance, indicating value and weight across different contexts and time periods. Such dual purposes underscore the unit’s adaptability and persistence through history, making it a fascinating study in linguistic and metrological evolution.

> Kilograms to Pounds Conversion Table

Kilograms Pounds
0 kg 0 lb
1 kg 2.20462 lb
2 kg 4.40925 lb
3 kg 6.61387 lb
4 kg 8.81849 lb
5 kg 11.02311 lb
6 kg 13.22774 lb
7 kg 15.43236 lb
8 kg 17.63698 lb
9 kg 19.8416 lb
10 kg 22.04623 lb
11 kg 24.25085 lb
12 kg 26.45547 lb
13 kg 28.66009 lb
14 kg 30.86472 lb
15 kg 33.06934 lb
16 kg 35.27396 lb
17 kg 37.47858 lb
18 kg 39.68321 lb
19 kg 41.88783 lb
20 kg 44.09245 lb
21 kg 46.29708 lb
22 kg 48.5017 lb
23 kg 50.70632 lb
24 kg 52.91094 lb
25 kg 55.11557 lb
26 kg 57.32019 lb
27 kg 59.52481 lb
28 kg 61.72943 lb
29 kg 63.93406 lb
30 kg 66.13868 lb
31 kg 68.3433 lb
32 kg 70.54792 lb
33 kg 72.75255 lb
34 kg 74.95717 lb
35 kg 77.16179 lb
36 kg 79.36641 lb
37 kg 81.57104 lb
38 kg 83.77566 lb
39 kg 85.98028 lb
40 kg 88.1849 lb
41 kg 90.38953 lb
42 kg 92.59415 lb
43 kg 94.79877 lb
44 kg 97.0034 lb
45 kg 99.20802 lb
46 kg 101.41264 lb
47 kg 103.61726 lb
48 kg 105.82189 lb
49 kg 108.02651 lb
50 kg 110.23113 lb
51 kg 112.43575 lb
52 kg 114.64038 lb
53 kg 116.845 lb
54 kg 119.04962 lb
55 kg 121.25424 lb
56 kg 123.45887 lb
57 kg 125.66349 lb
58 kg 127.86811 lb
59 kg 130.07273 lb
60 kg 132.27736 lb
61 kg 134.48198 lb
62 kg 136.6866 lb
63 kg 138.89123 lb
64 kg 141.09585 lb
65 kg 143.30047 lb
66 kg 145.50509 lb
67 kg 147.70972 lb
68 kg 149.91434 lb
69 kg 152.11896 lb
70 kg 154.32358 lb
71 kg 156.52821 lb
72 kg 158.73283 lb
73 kg 160.93745 lb
74 kg 163.14207 lb
75 kg 165.3467 lb
76 kg 167.55132 lb
77 kg 169.75594 lb
78 kg 171.96056 lb
79 kg 174.16519 lb
80 kg 176.36981 lb
81 kg 178.57443 lb
82 kg 180.77905 lb
83 kg 182.98368 lb
84 kg 185.1883 lb
85 kg 187.39292 lb
86 kg 189.59755 lb
87 kg 191.80217 lb
88 kg 194.00679 lb
89 kg 196.21141 lb
90 kg 198.41604 lb
91 kg 200.62066 lb
92 kg 202.82528 lb
93 kg 205.0299 lb
94 kg 207.23453 lb
95 kg 209.43915 lb
96 kg 211.64377 lb
97 kg 213.84839 lb
98 kg 216.05302 lb
99 kg 218.25764 lb
100 kg 220.46226 lb