Ounce to Kilogram Converter
One Ounce equals 0.02834952313 Kilogram (1 oz = 0.02834952313 kg). Multiply a Ounce value by 0.02834952313 to get the equivalent in Kilogram. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
kg = oz × 0.02834952313
Multiply the Ounce value by 0.02834952313 to get the equivalent value in Kilogram.
Example Conversions
1 Ounce (oz)
0.02834952313 Kilogram (kg)
5 Ounce (oz)
0.1417476156 Kilogram (kg)
10 Ounce (oz)
0.2834952312 Kilogram (kg)
25 Ounce (oz)
0.7087380781 Kilogram (kg)
100 Ounce (oz)
2.834952313 Kilogram (kg)
Conversion Table
| Ounce (oz) | Kilogram (kg) |
|---|---|
| 0.1 | 0.002834952312 |
| 0.5 | 0.01417476156 |
| 1 | 0.02834952313 |
| 2 | 0.05669904625 |
| 5 | 0.1417476156 |
| 10 | 0.2834952312 |
| 25 | 0.7087380781 |
| 50 | 1.417476156 |
| 100 | 2.834952313 |
| 250 | 7.087380781 |
| 500 | 14.17476156 |
| 1000 | 28.34952313 |
How to Convert Manually
Use these steps to convert Ounce values to Kilogram without the calculator.
- Write down the value in Ounce (oz) that you want to convert.
- Multiply that value by 0.02834952313.
- For example, 10 Ounce × 0.02834952313 = 0.2834952312 Kilogram.
- Label the result as Kilogram (kg).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Ounce and one Kilogram.
About Ounce and Kilogram
The ounce is one sixteenth of a pound, exactly 28.349523125 grams. US recipes, portion sizes, and postal rates use it for quantities a pound would state too coarsely. The kilogram is the SI base unit of mass, defined since 2019 by fixing the Planck constant rather than by the old platinum-iridium prototype. It is the reference for every other mass unit on this site. One Ounce equals 0.02834952313 Kilogram (1 oz = 0.02834952313 kg). Ounce to Kilogram conversion comes up most often in US recipe ingredients and in food portion sizes, typically when figures need restating for body weight outside the US.
Precision and Rounding: Metric-imperial mass factors are exact (1 lb = 0.45359237 kg by the 1959 agreement), so precision is purely a display choice. One decimal place is enough for body weight and cooking; nutrition labeling, pharmacy, and lab work need the full factor before rounding.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15 Ounce equals 0.4252428469 Kilogram.
15 oz × 0.02834952313 = 0.4252428469 kg
FAQ
How do I convert Ounce to Kilogram?
Multiply the Ounce value by 0.02834952313 to get the equivalent value in Kilogram.
What is the formula for Ounce to Kilogram?
The formula is kg = oz × 0.02834952313.
How many Kilogram are in 1 Ounce?
1 Ounce equals 0.02834952313 Kilogram.
Can I convert Kilogram back to Ounce?
Yes. 1 Kilogram equals 35.27396195 Ounce, and the related converter can reverse the calculation.
What are common names for Ounce and Kilogram?
Ounce is shown as oz and may also be searched as ounces. Kilogram is shown as kg and may also be searched as kilograms, kilo, kilos.
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