How to convert ounces to stone
To convert a measurement in ounces to stone, multiply the value by 0.004464285714. The conversion factor comes from the relationship between both units and the kilogram.
For example, to convert 5 oz to stone: 5 × 0.004464285714 = 0.022321428571 st.
What is a ounce?
An ounce is an imperial and US customary unit of mass equal to 1/16 of a pound or exactly 28.349523125 grams. The avoirdupois ounce descends from the Roman 'uncia' (one twelfth). It is distinct from the troy ounce used for precious metals, which is heavier at about 31.1 grams.
Common uses of ounces include: Food portions and recipe ingredients in the US; Postal and letter weights; Packaged goods net weight (cereal, snacks); Baby birth weights in the US.
What is a stone?
A stone is a British imperial unit of mass equal to 14 pounds or exactly 6.35029318 kilograms. The stone was historically used across Europe with regionally varying values before Britain standardized it at 14 pounds. It remains in everyday use in the UK and Ireland for body weight despite metrication.
Common uses of stone include: Body weight in the UK and Ireland; Weigh-ins for sports and fitness in Britain; Historical and livestock weight references; Everyday conversational weight in the British Isles.
Ounces to stone worked examples
Here are some common values converted:
1 oz = 0.004464285714 st 5 oz = 0.022321428571 st 10 oz = 0.044642857143 st 50 oz = 0.223214285714 st 100 oz = 0.446428571429 st
Frequently asked questions
How many stone are in one ounce?
One ounce (oz) equals 0.004464285714 stone (st). Multiply any value in ounces by 0.004464285714 to convert to stone.
How do I convert ounces to stone?
Multiply the value in ounces by 0.004464285714. For example, 5 oz × 0.004464285714 = 0.022321428571 st.
How do I convert stone to ounces?
Multiply the value in stone by 224, or divide by 0.004464285714. Use the swap button on the converter above to reverse the direction.
Is the ounce to stone conversion exact?
Yes. Since 1959 the international pound is defined as exactly 0.45359237 kg, so all weight conversions between metric and avoirdupois units use exact factors.
What is the formula for ounces to stone?
The formula is: st = oz × 0.004464285714. This comes from the definition of both units relative to the kilogram.