How to convert ounces to kilograms
To convert ounces to kilograms, multiply by 0.028349523125. Weight and mass conversions matter for cooking, shipping, fitness tracking, medicine and trade.
Ounce to Kilogram conversion table
| Ounce (oz) | Kilogram (kg) |
|---|---|
| 0.1 oz | 0.0028349523125 kg |
| 0.5 oz | 0.0141747615625 kg |
| 1 oz | 0.028349523125 kg |
| 2 oz | 0.05669904625 kg |
| 3 oz | 0.085048569375 kg |
| 4 oz | 0.1133980925 kg |
| 5 oz | 0.141747615625 kg |
| 10 oz | 0.28349523125 kg |
| 20 oz | 0.5669904625 kg |
| 25 oz | 0.708738078125 kg |
| 50 oz | 1.41747615625 kg |
| 100 oz | 2.8349523125 kg |
| 500 oz | 14.1747615625 kg |
| 1,000 oz | 28.349523125 kg |
About the units
Ounce (oz)
An avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 grams, used for food portions and postage.
Kilogram (kg)
The kilogram is the SI base unit of mass, defined through the Planck constant since 2019.
How to use this converter
- Type the number of ounces (oz) in the input box.
- The result in kilograms appears instantly — no button needed.
- See the same value in every other weight unit just below.
- Use “Swap units” to convert kilograms back to ounces.
Tips for better results
- Double-check which system a unit belongs to (for example US vs UK gallons).
- Use the swap button to convert in the opposite direction instantly.
- Bookmark the conversions you use most — each pair has its own page.
Frequently asked questions
How many kilograms are in one ounce?
One ounce equals 0.028349523125 kilograms. 0.028349523125 is the exact factor used by this converter.
How do I convert ounces to kilograms?
Multiply the value in ounces by 0.028349523125. To go the other way, multiply kilograms by 35.2739619496.
What is 10 oz in kg?
10 oz = 0.28349523125 kg. Also, 5 oz = 0.141747615625 kg and 100 oz = 2.8349523125 kg.
What is the difference between a ounce and a kilogram?
An avoirdupois ounce is 1/16 of a pound, exactly 28.349523125 grams, used for food portions and postage. The kilogram is the SI base unit of mass, defined through the Planck constant since 2019.
Is this tool free and private?
Yes — the Ounce to Kilogram is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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