Ounces to Kilograms
Convert ounces to kilograms instantly. 1 oz = 0.0283495231 kg. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert ounces to kilograms
To convert ounces to kilograms, divide by 35.2739619496 (multiply by 0.0283495231). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
kg = oz × 0.0283495231
Ounces to Kilograms conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Ounces | Kilograms |
|---|---|
| 1 oz | 0.02835 kg |
| 2 oz | 0.056699 kg |
| 3 oz | 0.085049 kg |
| 5 oz | 0.141748 kg |
| 10 oz | 0.283495 kg |
| 20 oz | 0.56699 kg |
| 25 oz | 0.708738 kg |
| 50 oz | 1.417476 kg |
| 100 oz | 2.834952 kg |
| 500 oz | 14.174762 kg |
| 1,000 oz | 28.349523 kg |
What is a ounce?
A sixteenth of a pound, exactly 28.349523125 g.
What is a kilogram?
The SI base unit of mass, defined since 2019 by the Planck constant.
The formula
kg = oz × 0.0283495231
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Ounces to Kilograms
- Type the number of ounces you want to convert.
- Read the result in kilograms straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked kilograms to ounces page.
Ounces to Kilograms — frequently asked questions
How many kilograms are in a ounce?
One ounce equals 0.0283495231 kg. kg = oz × 0.0283495231
What is the formula to convert ounces to kilograms?
The formula is kg = oz × 0.0283495231. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert kilograms back to ounces?
Divide instead of multiplying: one kilogram is 35.2739619496 oz. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this ounces to kilograms free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error