Ounce to Stone Converter
Weight · unit-converter
Convert Ounce to Stone 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: Ounce (oz)
To: Stone (st)
About Ounce
The avoirdupois ounce is 1/16 of an avoirdupois pound (about 28.35 g). Cooking and postal weights often use ounces.
About Stone
The stone is 14 pounds (UK and Ireland). It is often used for human body weight in those regions.
How to convert ounces to stone
1 ounce is equal to 0.00446428571429 stone:
1 oz = (28.349523125 g ÷ 6350.29318 g) st = 0.00446428571429 st
Each ounce is defined as 28.349523125 g and each stone as 6350.29318 g, so one oz equals 28.349523125 ÷ 6350.29318 st = 0.00446428571429 st.
Let w(oz) be the numeric value of the same mass measured in Ounce (oz), and w(st) the value in Stone (st). Then:
w(st) = w(oz) × (28.349523125 / 6350.29318)
Equivalently, divide by how many oz fit into one st (grams per st divided by grams per oz):
w(st) = w(oz) ÷ 223.99999999999997
Or: stone = ounce ÷ 223.99999999999997
Examples
Example #1: Convert 20 oz to stone
20 oz = 20 oz × (28.349523125/6350.29318) st = 0.0892857143 st
20 oz = 20 oz ÷ 223.99999999999997 = 0.0892857143 st
Example #2: Convert 50 oz to stone
50 oz = 50 oz × (28.349523125/6350.29318) st = 0.2232142857 st
50 oz = 50 oz ÷ 223.99999999999997 = 0.2232142857 st
Summary
To convert Ounce to Stone, multiply the value in oz by the ratio of grams per oz divided by grams per st. Equivalently: value_st = value_oz × (28.349523125 / 6350.29318). Numerically, 1 oz equals 0.004464285714285715 st.
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
| Ounce (oz) | Stone (st) |
|---|---|
| 0.1 | 0.0004464286 |
| 1 | 0.0044642857 |
| 2 | 0.0089285714 |
| 3 | 0.0133928571 |
| 4 | 0.0178571429 |
| 5 | 0.0223214286 |
| 6 | 0.0267857143 |
| 7 | 0.03125 |
| 8 | 0.0357142857 |
| 9 | 0.0401785714 |
| Ounce (oz) | Stone (st) |
|---|---|
| 10 | 0.0446428571 |
| 20 | 0.0892857143 |
| 30 | 0.1339285714 |
| 40 | 0.1785714286 |
| 50 | 0.2232142857 |
| 60 | 0.2678571429 |
| 70 | 0.3125 |
| 80 | 0.3571428571 |
| 90 | 0.4017857143 |
| 100 | 0.4464285714 |