Stone to Hundredweight (UK) Converter
Weight · unit-converter
Convert Stone to Hundredweight (UK) with a fixed input and output unit, step-by-step formula line, and reference tables. All calculations use gram-based factors (international avoirdupois pound and metric definitions). The full Weight Converter also includes carat, grain, and US/UK hundredweight.
Calculator
From: Stone (st)
To: Hundredweight (UK) (cwt_uk)
About Stone
The stone is 14 pounds (UK and Ireland). It is often used for human body weight in those regions.
About Hundredweight (UK)
The UK hundredweight (long hundredweight) is 112 lb, about 50.802 kg. It appears in legacy UK trade and agriculture references.
How to convert stone to hundredweight (uk)
1 stone is equal to 0.125 hundredweight (uk):
1 st = (6350.29318 g ÷ 50802.34544 g) cwt_uk = 0.125 cwt_uk
Each stone is defined as 6350.29318 g and each hundredweight (uk) as 50802.34544 g, so one st equals 6350.29318 ÷ 50802.34544 cwt_uk = 0.125 cwt_uk.
Let w(st) be the numeric value of the same mass measured in Stone (st), and w(cwt_uk) the value in Hundredweight (UK) (cwt_uk). Then:
w(cwt_uk) = w(st) × (6350.29318 / 50802.34544)
Equivalently, divide by how many st fit into one cwt_uk (grams per cwt_uk divided by grams per st):
w(cwt_uk) = w(st) ÷ 8
Or: hundredweight (uk) = stone ÷ 8
Examples
Example #1: Convert 20 st to hundredweight (uk)
20 st = 20 st × (6350.29318/50802.34544) cwt_uk = 2.5 cwt_uk
20 st = 20 st ÷ 8 = 2.5 cwt_uk
Example #2: Convert 50 st to hundredweight (uk)
50 st = 50 st × (6350.29318/50802.34544) cwt_uk = 6.25 cwt_uk
50 st = 50 st ÷ 8 = 6.25 cwt_uk
Summary
To convert Stone to Hundredweight (UK), multiply the value in st by the ratio of grams per st divided by grams per cwt_uk. Equivalently: value_cwt_uk = value_st × (6350.29318 / 50802.34544). Numerically, 1 st equals 0.125 cwt_uk.
Relationship context
Both units belong to imperial / UK (stone, long ton, pound, ounce). Relationships such as 16 oz per lb and 14 lb per stone are exact in the avoirdupois system; tons use fixed pound counts. This tool uses international definitions tied to the kilogram.
Conversion tables
| Stone (st) | Hundredweight (UK) (cwt_uk) |
|---|---|
| 0.1 | 0.0125 |
| 1 | 0.125 |
| 2 | 0.25 |
| 3 | 0.375 |
| 4 | 0.5 |
| 5 | 0.625 |
| 6 | 0.75 |
| 7 | 0.875 |
| 8 | 1 |
| 9 | 1.125 |
| Stone (st) | Hundredweight (UK) (cwt_uk) |
|---|---|
| 10 | 1.25 |
| 20 | 2.5 |
| 30 | 3.75 |
| 40 | 5 |
| 50 | 6.25 |
| 60 | 7.5 |
| 70 | 8.75 |
| 80 | 10 |
| 90 | 11.25 |
| 100 | 12.5 |