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Established officially at 140 lb (63.5 kg) in 1920 by Walker Law; recognized in 1959 Super Featherweight: 126–130 lb (57.2 - 59 kg) Established at 130 lb (59 kg) in 1920 by Walker Law; recognized in 1959 Super Bantamweight: 118–122 lb (53.5 - 55.3 kg) Established at 122 lb (55.3 kg) in 1920 by Walker Law; recognized in 1976 Super Flyweight
The stone or stone weight (abbreviation: st.) [1] is an English and British imperial unit of mass equal to 14 avoirdupois pounds (6.35 kg). [nb 1] The stone continues in customary use in the United Kingdom and Ireland for body weight.
1.0 long cwt (110 lb; 51 kg) short hundredweight: short cwt short cwt 1.0 short cwt (100 lb; 45 kg) long quarter: long qtr long qtr 1.0 long qtr (28 lb; 13 kg) short quarter: short qtr short qtr 1.0 short qtr (25 lb; 11 kg) stone: st st 14 lb used mostly in the British Commonwealth except Canada 1.0 st (14 lb; 6.4 kg) st kg. st kg lb; st lb. st ...
|weight=100 kg → 100 kg (220 lb; 15 st 10 lb) |weight=108–111 kg → 108–111 kg (238–245 lb; 17 st 0 lb – 17 st 7 lb) If a template uses {{Infobox person/weight|{{{weight}}} |lb-stlb=yes }} , then an article using that template with an input in lb will display two conversions: kg followed by st /lb (default is one conversion to kg):
However, the names of all SI mass units are based on gram, rather than on kilogram; thus 10 3 kg is a megagram (10 6 g), not a *kilokilogram. The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg. The unit is in common use for masses above about 10 3 kg and is often used with SI prefixes.
The equivalence for the pound was given as 1 lb = 453.592 65 g or 0.45359 kg, which made the kilogram equivalent to about 2.204 6213 lb. In 1883, it was determined jointly by the standards department of the British Board of Trade and the Bureau International that 0.453 592 4277 kg was a better approximation, and this figure, rounded to 0.453 ...
For a variety of reasons (largely historical), weight classes of the same name can be of vastly different weights. For example, a boxing middleweight weighs up to 72 kg (160 lb), an ISKA middleweight upper limit is 75 kg (165 lb), and a K-1 middleweight upper limit is 70 kg (154 lb).
The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10 −34 when expressed in the unit J⋅s, which is equal to kg⋅m 2 ⋅s −1, where the metre and the second are defined in terms of c and Δν Cs. —