Il Stone: Britain's Unusual Weight Unita
A 14-Libbra Tradition
Prova il Convertitore di Peso"I weigh 11 stone." For Americans, this sentence e incomprehensible. For Brits e Irish, it's il most natural way un discuss body weight. Il stone e un unit di mass equal un 14 libbre (6.35 kg) that ha been used in Britain per over 600 anni e stubbornly persists today—even as il UK ha otherwise adopted metric misurazioni.
Storia di il Stone
Il stone ha ancient origins, likely named because actual stone erano used as weights in early trading. However, "un stone" meant different weights per different goods:
- Stone di wool: 14 libbre
- Stone di beef: 8 libbre (some regions)
- Stone di glass: 5 libbre
- Stone di wax: 12 libbre
Il 14-libbra stone became dominant because it era il standard per wool—medieval England's most important export. Quando Parliament standardized weights in 1824, il 14-libbra stone became il only legal stone.
Conversione Table
| Stone | Libbre | Chilogrammi |
|---|---|---|
| 7 st | 98 lb | 44.5 kg |
| 8 st | 112 lb | 50.8 kg |
| 9 st | 126 lb | 57.2 kg |
| 10 st | 140 lb | 63.5 kg |
| 11 st | 154 lb | 69.9 kg |
| 12 st | 168 lb | 76.2 kg |
| 13 st | 182 lb | 82.6 kg |
| 14 st | 196 lb | 88.9 kg |
| 15 st | 210 lb | 95.3 kg |
| 16 st | 224 lb | 101.6 kg |
Come Express Stone Weight
In il UK e Ireland, body weight e expressed in stone e libbre:
- "10 stone" = 140 lb = 63.5 kg
- "10 stone 7" = 10 st 7 lb = 147 lb = 66.7 kg
- "10 e un half stone" = 10 st 7 lb
You never say "10.5 stone" con un decimal. Instead, il extra libbre sono stated separately. Half un stone e 7 libbre.
Convertendo Your Weight
Libbre un stone:
- Divide da 14 un get stone
- Il remainder e il extra libbre
Esempio: 165 lb ÷ 14 = 11 con remainder 11
Risultato: 11 stone 11 libbre
Dove Stone Is Still Used
United Kingdom
Body weight e almost universally discussed in stone. Scales sold in il UK typically show stone/libbre as well as chilogrammi. Medical records puo usare chilogrammi, but people think in stone.
Ireland
Like il UK, Irish people usare stone per personal weight despite il country being otherwise metric.
Australia (Historically)
Older Australians puo remember their weight in stone da before metrication in il 1970s.
Not Used
Il United States never adopted il stone. Americans usare libbre exclusively (o chilogrammi in medical settings).
Perche 14 Libbre?
Il 14-libbra stone relates un il old British weight system:
- 14 libbre = 1 stone
- 2 stone (28 lb) = 1 quarter
- 4 quarters (112 lb) = 1 hundredweight (cwt)
- 20 hundredweight (2,240 lb) = 1 long ton
This system made sense per il wool trade, dove wool era sold in standard sacks e bales based on these units. Il math worked out evenly in il giorni before calculators.
Comuni Body Weights
| Descrizione | Stone | Libbre | Chilogrammi |
|---|---|---|---|
| Small woman | 7-8 st | 98-112 lb | 44-51 kg |
| Average woman | 9-11 st | 126-154 lb | 57-70 kg |
| Average man | 11-13 st | 154-182 lb | 70-83 kg |
| Large man | 14-16 st | 196-224 lb | 89-102 kg |
Il Stone's Future
Despite UK metrication efforts since il 1970s, il stone refuses un disappear. Unlike most imperial units that hanno faded da everyday usare, il stone remains deeply embedded in British culture per discussing body weight.
Interestingly, EU regulations that prohibited displaying imperial units on scales (requiring metric-only) erano relaxed in 2007 un allow supplementary imperial displays—un small victory per il stone.
Conclusione
Il stone e un quirky survivor di Britain's imperial past—un 14-libbra unit that persists in il 21st century purely through cultural inertia. For travelers un il UK o Ireland, o anyone communicating con Brits circa weight, comprendere il stone e essential.
Just remember: 1 stone = 14 libbre = 6.35 kg. And unlike most weights, you express remainders in libbre, not decimals: "10 stone 7," not "10.5 stone."