Convert Stones (st) to Ounces (oz)
1 stone equals 224 ounces.
Formula:
oz = st × 224
Stone to Ounce Converter
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Result
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How to Convert Stone to Ounce
1 stone = 224 ounces
Ounce = Stone × 224
Example: 1 st × 224 = 224 oz
Reverse Conversion
To convert ounces back to stones:
- Remember, 1 ounce equals 0.00446429 stones.
- To convert 224 oz to st, multiply
224 x 0.00446429, resulting in1 st.
Common Stone to Ounce Conversions
| Stone | Ounce | Actions |
|---|---|---|
| 50 stones | 11200 ounces | |
| 100 stones | 22400 ounces | |
| 500 stones | 112000 ounces | |
| 1000 stones | 224000 ounces |
Stones to ounces Conversion Table
Reference table with common stones to ounces conversions. All values calculated with high precision.
Stones to Ounces Table
1 to 100000
Ounces to Stones Table
1000 to 1 × 108
Definition of Stone
- Definition
- The stone (st) is a traditional British unit of mass, primarily used for expressing human body weight in the UK and Ireland.
Although not part of the SI system, it remains culturally relevant and widely understood in health-related contexts. - Exact factor
- 1 st = 14 lb = 6.35029318 kg
- Examples
- • 11 st ≈ 69.85 kg
• 12 st 7 lb ≈ 79.38 kg
Definition of Ounce
- Definition
- The ounce (oz) is a unit of mass equal to one sixteenth of a pound in the avoirdupois system. It is commonly used for food portions, postal items, and small packages.
The ounce remains prevalent in countries using imperial or US customary units. - Exact factor
- 1 oz = 28.349523125 g = 0.0625 lb
- Examples
- • 16 oz = 1 lb
• 8 oz ≈ 226.8 g
About the Stone
Facts & Uses
- Traditional British and Irish unit equal to exactly 14 avoirdupois pounds = 6.35029318 kg. Still in everyday use in the UK and Ireland for body weight.
- Used in healthcare records, weight-loss programs, and sports broadcasting (boxing, rugby, horse racing) — typically reported as "X stone Y pounds" (e.g., 12 st 7 lb).
- Largely obsolete in commerce — UK retail and food packaging have used metric units (kg) since the 1995/2000 EU directives — but persists culturally for personal weight.
- Not used in the United States or in continental Europe; American expatriates in the UK often find the unit confusing on their first GP visit.
Curiosities
- The name comes literally from the practice of using stones as standard weights in medieval markets. The value varied wildly by region and commodity — from 4 lb (in some wool trades) to 32 lb (for cheese in Northumberland) — until the 1835 Weights and Measures Act fixed it at 14 lb.
- A typical adult man in the UK weighs around 11–14 stone (70–89 kg); a typical woman 9–12 stone (57–76 kg).
- The plural is irregular: "He weighs 12 stone" (singular form even for plural quantity) — a quirk of British English.
- 1 st = 14 lb = exactly 6.35029318 kg ≈ 224 oz.
Sources
About the Ounce
Facts & Uses
- Avoirdupois ounce equals 1/16 of a pound = exactly 28.349523125 grams (derived from the 1959 Agreement on the pound).
- Standard unit for food portions (deli meats, cheese), postal letter weights (US 1st-class mail), and beverage servings (a 12 oz soda can).
- Common in cooking for both dry and fluid ingredients in the US — though the fluid ounce (volume) and ounce (mass) are unrelated and frequently confused.
- Used in boxing glove weights (8 oz / 10 oz / 12 oz), archery (arrow weight), and jewelry for non-precious metal items.
Curiosities
- The troy ounce (used for gold, silver, platinum) is heavier: 1 troy oz ≈ 31.1035 g, vs. 28.35 g for avoirdupois — a ~10% difference that matters at bullion prices.
- The symbol "oz" derives from the medieval Italian onza, in turn from the Latin uncia meaning "a twelfth part" (originally 1/12 of a Roman pound).
- 16 oz (1 lb) of feathers and 16 oz (1 lb) of gold weigh the same in avoirdupois — but the gold would actually weigh more if measured in troy ounces, since 1 lb troy = 12 troy oz only.
- 1 oz ≈ 28.35 g ≈ 437.5 grains.
Sources
Frequently Asked Questions
How many ounces are in one stone?
One stone equals 224 ounces. To convert, multiply the stone value by 224. For the reverse, divide the ounce value by 224 (or multiply by 0.00446429).
What is 3 <span class="fraction"><span class="top">1</span><span class="bottom">2</span></span> stones in ounces?
3 12 stones = 784 ounces. This is one of the most commonly searched conversions for this pair.
How precise is the stone-to-ounce conversion?
The factor 224 is accurate to 6 significant figures, derived from international measurement standards. Our calculator uses full precision internally.
Looking for the reverse? Convert Ounce to Stone
Related Weight (Mass) Converters
Explore other weight (mass) conversion tools:
Need a combined format?
- Kg to Pounds and Ounces — combined lb + oz format
- Kg to Stones and Pounds — UK body weight format
Related in other categories:
- G-force to m/s² — Force = mass × acceleration (F = ma)
Conversion factors verified against NIST (National Institute of Standards and Technology), BIPM (International Bureau of Weights and Measures)
1 lb = 0.45359237 kg by international agreement (1959).
Last reviewed: March 2026
