Direct answer
How Many Kilograms in an Ounce? 1 oz ≈ 0.0283495 kg
1 avoirdupois ounce equals about 0.0283495 kilograms. Shipping and kitchen answer with converter links.
Question
How many kilograms are in an ounce?
1 avoirdupois ounce (oz) equals approximately 0.028349523125 kilograms (kg).
1 oz
≈ 0.0283495 kg
1 oz
≈ 28.3495 g
16 oz
1 lb = 0.45359237 kg
Explanation
There are 16 ounces in a pound and 1 lb = 0.45359237 kg, so 1 oz = 0.45359237 ÷ 16 kg.
Quick estimate: multiply ounces by 0.02835 to get kilograms.
This is weight ounces, not fluid ounces.
Important caveat
Do not confuse weight ounces with fluid ounces (volume).