An imperial long hundredweight is 112 pounds.
Imperial hundredweights to Stones Converter — long cwt to st
Convert Imperial hundredweight (long cwt) to Stone (st) using the exact conversion factor (1 imperial hundredweight = 8 stone). See the formula, worked examples, conversion table, history, and common uses.
Imperial hundredweights to Stones converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
A stone is 14 pounds.
Result = input x 50.80234544 / 6.35029318.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Imperial hundredweights to Stones
Weight conversions between Imperial hundredweight and Stone come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Specifically: An imperial long hundredweight is 112 pounds, and a stone is 14 pounds.
Formula
stones = imperial hundredweights × 8
This factor comes from each unit's defined relationship to the category's base unit: 1 imperial hundredweight equals 50.80234544 base units, and 1 stone equals 6.35029318 base units, so dividing one by the other gives the direct imperial hundredweight-to-stone factor of 8.
Simple example
1 long cwt × 8 = 8 st
1 imperial hundredweight = 8 stones.
Real-world example
50 long cwt × 8 = 400 st
50 imperial hundredweights = 400 stones.
Conversion table
| Imperial hundredweight (long cwt) | Stone (st) |
|---|---|
| 1 long cwt | 8 st |
| 5 long cwt | 40 st |
| 10 long cwt | 80 st |
| 25 long cwt | 200 st |
| 50 long cwt | 400 st |
| 100 long cwt | 800 st |
Reverse conversion: Stone to Imperial hundredweight
8 st × 0.125 = 1 long cwt
8 stones = 1 imperial hundredweight.
imperial hundredweights = stones × 0.125
For a page dedicated to this direction, see Stone to Imperial hundredweight.
Understanding the Imperial hundredweight (long cwt)
An imperial long hundredweight is 112 pounds.
Understanding the Stone
Stone (st) measures mass. A stone is 14 pounds: exactly 6.35029318 kilograms. It is classified as a UK customary unit.
Where it's used: United Kingdom and Ireland (body weight)
Uses of the Stone today
- Body weight reporting in the UK and Ireland (e.g. '12 stone 5 pounds')
- Historical wool and agricultural produce weighing
History of the Stone
The stone dates to medieval England as a general-purpose weight unit, historically varying by region and commodity (a 'stone' of wool differed from a 'stone' of meat) before settling on 14 pounds for general use. It remains in everyday use for body weight in the UK and Ireland, unlike most other English customary units which have been replaced or supplemented by metric measures.
Historical origin. Stone was not the invention of a single named person; it developed through the process described above.
Stone — sources
- UK Weights and Measures Act 1985 — Confirms the stone (14 lb) as a legally recognized UK unit for body weight.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many stones are in 1 imperial hundredweight?
1 imperial hundredweight equals 8 stones, using the exact defined conversion factor rather than an estimate.
How do I convert imperial hundredweight to stone?
Multiply the imperial hundredweight value by 8. The converter above does this instantly to whatever precision you set.
How do I convert stone back to imperial hundredweight?
Use the reverse factor: 1 stone equals 0.125 imperial hundredweights. You can also use the swap control in the converter above to flip the direction instantly.
What is a imperial hundredweight?
Imperial hundredweight (long cwt) is a unit of mass/weight.
What is a stone?
Stone (st) measures mass. A stone is 14 pounds: exactly 6.35029318 kilograms. It is classified as a UK customary unit.
Is the imperial hundredweight to stone conversion exact?
Yes. A stone is 14 pounds: exactly 6.35029318 kilograms. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.