Convert ounces to kilograms
Converting ounces to kilograms is a common weight task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 oz equals 0.0283495 kg, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert ounces to kilograms
To convert ounces to kilograms, multiply the number of ounces by 0.0283495. For example, 10 oz × 0.0283495 = 0.283495 kg.
kg = oz × 0.0283495
- Write down the value in ounces you want to convert.
- Multiply it by 0.0283495 (the exact oz→kg factor).
- The result is your value in kilograms. Check it below with the converter or the table.
Conversion table
Common values of ounces and their equivalents in kilograms:
| oz | kg |
|---|---|
| 1 | 0.0283495 |
| 2 | 0.056699 |
| 3 | 0.0850486 |
| 4 | 0.113398 |
| 5 | 0.141748 |
| 10 | 0.283495 |
| 20 | 0.56699 |
| 25 | 0.708738 |
| 50 | 1.41748 |
| 100 | 2.83495 |
| 250 | 7.08738 |
| 500 | 14.1748 |
About these units
Ounce (oz). The avoirdupois ounce is a US customary unit defined as exactly 28.349523125 grams, or 1/16 of a pound. Food portions and packaged goods in the US are labeled in ounces.
Kilogram (kg). The kilogram is the SI base unit of mass, defined by fixing Planck's constant since 2019. It is the everyday standard for body weight, groceries and cargo worldwide.
Frequently asked questions
How do I convert ounces to kilograms?
To convert ounces to kilograms, multiply the number of ounces by 0.0283495. For example, 10 oz × 0.0283495 = 0.283495 kg. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many kilograms are in 1 ounce?
1 oz = 0.0283495 kg. That is the fixed relationship used by this converter and by international standards.
How many ounces are in 1 kilogram?
1 kg = 35.274 oz. If you are converting in the opposite direction, use our Kilogram to Ounce converter for the dedicated table and FAQ.
Is the ounces to kilograms conversion exact?
Yes. Both units are defined by international agreement, so the factor of 0.0283495 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is ounce used for?
The avoirdupois ounce is a US customary unit defined as exactly 28.349523125 grams, or 1/16 of a pound. Food portions and packaged goods in the US are labeled in ounces.