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Before approximately the 14th century there were two hundredweights in England, one of 100 pounds, and one of 108 pounds. In 1340, King Edward III changed the value of the stone from 12 pounds to 14 pounds. Since a hundredweight is 8 stones, the 100-pound hundredweight became 112 pounds.
The kilogram is the base unit of mass in the International (SI) System of Units, and is accepted on a day-to-day basis as a unit of weight (the gravitational force acting on any given object).
The kilogram is almost exactly equal to the mass of one litre of water.
| Long Hundredweights (UK) | Kilograms |
|---|---|
| 0cwt long | 0.00kg |
| 1cwt long | 50.80kg |
| 2cwt long | 101.60kg |
| 3cwt long | 152.41kg |
| 4cwt long | 203.21kg |
| 5cwt long | 254.01kg |
| 6cwt long | 304.81kg |
| 7cwt long | 355.62kg |
| 8cwt long | 406.42kg |
| 9cwt long | 457.22kg |
| 10cwt long | 508.02kg |
| 11cwt long | 558.83kg |
| 12cwt long | 609.63kg |
| 13cwt long | 660.43kg |
| 14cwt long | 711.23kg |
| 15cwt long | 762.04kg |
| 16cwt long | 812.84kg |
| 17cwt long | 863.64kg |
| 18cwt long | 914.44kg |
| 19cwt long | 965.24kg |
| Long Hundredweights (UK) | Kilograms |
|---|---|
| 20cwt long | 1016.05kg |
| 21cwt long | 1066.85kg |
| 22cwt long | 1117.65kg |
| 23cwt long | 1168.45kg |
| 24cwt long | 1219.26kg |
| 25cwt long | 1270.06kg |
| 26cwt long | 1320.86kg |
| 27cwt long | 1371.66kg |
| 28cwt long | 1422.47kg |
| 29cwt long | 1473.27kg |
| 30cwt long | 1524.07kg |
| 31cwt long | 1574.87kg |
| 32cwt long | 1625.68kg |
| 33cwt long | 1676.48kg |
| 34cwt long | 1727.28kg |
| 35cwt long | 1778.08kg |
| 36cwt long | 1828.88kg |
| 37cwt long | 1879.69kg |
| 38cwt long | 1930.49kg |
| 39cwt long | 1981.29kg |
| Long Hundredweights (UK) | Kilograms |
|---|---|
| 40cwt long | 2032.09kg |
| 41cwt long | 2082.90kg |
| 42cwt long | 2133.70kg |
| 43cwt long | 2184.50kg |
| 44cwt long | 2235.30kg |
| 45cwt long | 2286.11kg |
| 46cwt long | 2336.91kg |
| 47cwt long | 2387.71kg |
| 48cwt long | 2438.51kg |
| 49cwt long | 2489.31kg |
| 50cwt long | 2540.12kg |
| 51cwt long | 2590.92kg |
| 52cwt long | 2641.72kg |
| 53cwt long | 2692.52kg |
| 54cwt long | 2743.33kg |
| 55cwt long | 2794.13kg |
| 56cwt long | 2844.93kg |
| 57cwt long | 2895.73kg |
| 58cwt long | 2946.54kg |
| 59cwt long | 2997.34kg |