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.
The “ton” has different meanings depending on where you are in the world. In the United States, the short ton weighs 2,000 pounds, whereas in the United Kingdom, the long ton is slightly heavier at 2,240 pounds. Meanwhile, the metric ton (or tonne) used in most countries around the globe weighs exactly 1,000 kilograms or 2,204.62 pounds, which aligns with the International System of Units.
Interestingly, the term “ton” originated from “tun,” a large cask used to measure wine or ale’s capacity in medieval times. This historical connection signifies not just weight but also volume, reflecting the ton’s versatile application throughout history. Whether measuring ship’s cargo or carbon emissions, the ton continues to be a crucial unit in various fields.
Pounds | Tons |
---|---|
0
lb
|
0
t
|
1
lb
|
0.0005
t
|
2
lb
|
0.001
t
|
3
lb
|
0.0015
t
|
4
lb
|
0.002
t
|
5
lb
|
0.0025
t
|
6
lb
|
0.003
t
|
7
lb
|
0.0035
t
|
8
lb
|
0.004
t
|
9
lb
|
0.0045
t
|
10
lb
|
0.005
t
|
11
lb
|
0.0055
t
|
12
lb
|
0.006
t
|
13
lb
|
0.0065
t
|
14
lb
|
0.007
t
|
15
lb
|
0.0075
t
|
16
lb
|
0.008
t
|
17
lb
|
0.0085
t
|
18
lb
|
0.009
t
|
19
lb
|
0.0095
t
|
20
lb
|
0.01
t
|
21
lb
|
0.0105
t
|
22
lb
|
0.011
t
|
23
lb
|
0.0115
t
|
24
lb
|
0.012
t
|
25
lb
|
0.0125
t
|
26
lb
|
0.013
t
|
27
lb
|
0.0135
t
|
28
lb
|
0.014
t
|
29
lb
|
0.0145
t
|
30
lb
|
0.015
t
|
31
lb
|
0.0155
t
|
32
lb
|
0.016
t
|
33
lb
|
0.0165
t
|
34
lb
|
0.017
t
|
35
lb
|
0.0175
t
|
36
lb
|
0.018
t
|
37
lb
|
0.0185
t
|
38
lb
|
0.019
t
|
39
lb
|
0.0195
t
|
40
lb
|
0.02
t
|
41
lb
|
0.0205
t
|
42
lb
|
0.021
t
|
43
lb
|
0.0215
t
|
44
lb
|
0.022
t
|
45
lb
|
0.0225
t
|
46
lb
|
0.023
t
|
47
lb
|
0.0235
t
|
48
lb
|
0.024
t
|
49
lb
|
0.0245
t
|
50
lb
|
0.025
t
|
51
lb
|
0.0255
t
|
52
lb
|
0.026
t
|
53
lb
|
0.0265
t
|
54
lb
|
0.027
t
|
55
lb
|
0.0275
t
|
56
lb
|
0.028
t
|
57
lb
|
0.0285
t
|
58
lb
|
0.029
t
|
59
lb
|
0.0295
t
|
60
lb
|
0.03
t
|
61
lb
|
0.0305
t
|
62
lb
|
0.031
t
|
63
lb
|
0.0315
t
|
64
lb
|
0.032
t
|
65
lb
|
0.0325
t
|
66
lb
|
0.033
t
|
67
lb
|
0.0335
t
|
68
lb
|
0.034
t
|
69
lb
|
0.0345
t
|
70
lb
|
0.035
t
|
71
lb
|
0.0355
t
|
72
lb
|
0.036
t
|
73
lb
|
0.0365
t
|
74
lb
|
0.037
t
|
75
lb
|
0.0375
t
|
76
lb
|
0.038
t
|
77
lb
|
0.0385
t
|
78
lb
|
0.039
t
|
79
lb
|
0.0395
t
|
80
lb
|
0.04
t
|
81
lb
|
0.0405
t
|
82
lb
|
0.041
t
|
83
lb
|
0.0415
t
|
84
lb
|
0.042
t
|
85
lb
|
0.0425
t
|
86
lb
|
0.043
t
|
87
lb
|
0.0435
t
|
88
lb
|
0.044
t
|
89
lb
|
0.0445
t
|
90
lb
|
0.045
t
|
91
lb
|
0.0455
t
|
92
lb
|
0.046
t
|
93
lb
|
0.0465
t
|
94
lb
|
0.047
t
|
95
lb
|
0.0475
t
|
96
lb
|
0.048
t
|
97
lb
|
0.0485
t
|
98
lb
|
0.049
t
|
99
lb
|
0.0495
t
|
100
lb
|
0.05
t
|
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