Ounce to Kilogram Converter
Quick answer
To convert Ounces to Kilograms, multiply by 0.0283495231 (or divide by 35.2739619496). Therefore, 1 Ounce (oz) equals 0.02834952 Kilograms (kg).
Formula: kg = oz × 0.0283495231. Worked example: 10 oz = 0.283495 kg.
Convert Ounce (oz) to Kilogram (kg) online with our free unit converter. In mass, 1 oz = 0.02835 kg. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Ounce to Kilogram
- Step 1 — start with the formula. kg = oz × 0.0283495231
- Step 2 — substitute your figure. 10 oz × 0.0283495231
- Step 3 — read the result. 10 oz = 0.283495 kg
- Step 4 — check it in reverse. oz = kg × 35.2739619496 returns 10 oz, which matches the figure you started with.
Mass Converter
26 units available
1 oz = 0.02835 kg
Formula:
kg = oz × 0.0283495231With your value: 1 oz = 0.02834952 kg
How big is that?
Everyday references on a logarithmic scale, all expressed in ounce so you can sanity-check the result.
Other Ounce to Kilogram conversions
Ounce to Kilogram Conversion Table
| Ounce (oz) | Kilogram (kg) |
|---|---|
| 0.5 | 0.014175 |
| 1 | 0.02835 |
| 2 | 0.056699 |
| 5 | 0.141748 |
| 10 | 0.283495 |
| 15 | 0.425243 |
| 20 | 0.56699 |
| 25 | 0.708738 |
| 50 | 1.417476 |
| 100 | 2.834952 |
| 250 | 7.087381 |
| 500 | 14.174762 |
| 1000 | 28.349523 |
Kilogram to Ounce Conversion Table
| Kilogram (kg) | Ounce (oz) |
|---|---|
| 0.5 | 17.636981 |
| 1 | 35.273962 |
| 2 | 70.547924 |
| 5 | 176.36981 |
| 10 | 352.739619 |
| 15 | 529.109429 |
| 20 | 705.479239 |
| 25 | 881.849049 |
| 50 | 1,763.698097 |
| 100 | 3,527.396195 |
| 250 | 8,818.490487 |
| 500 | 17,636.980975 |
| 1000 | 35,273.96195 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Ounce (oz)
Mass
1 avoirdupois ounce = 1/16 lb = 0.028 349 523 125 kg exactly.
Source: International Yard and Pound Agreement of 1959; NIST Federal Register Notice 59-5442
US, UK, Canada, Australia, New Zealand, South Africa · Reviewed 2026-07-01
Kilogram (kg)
Mass
The kilogram is defined by taking the Planck constant to be exactly 6.626 070 15 × 10⁻³⁴ J·s.
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Ounce to Kilogram
To convert from Ounce (oz) to Kilogram (kg), multiply the value by 0.0283495231.
Formula: kg = oz × 0.0283495231
Reverse: oz = kg × 35.2739619496
Step-by-Step Example
- Start with your value in Ounce. For example: 5 oz
- Multiply by the conversion factor: 5 x 0.0283495231
- The result is: 0.141748 kg
Ounce and Kilogram Relationship
This conversion bridges the US Customary / Imperial and Metric (SI) measurement systems, commonly required when translating scientific data, international engineering specifications, or trade standards. Since 1 Ounce represents a fraction of a Kilogram (1 Kilogram ≈ 35.274 Ounces), the Kilogram is the larger measurement interval. Understanding the relationship between Ounce and Kilogram is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Ounce
The ounce (oz) equals 1/16 of a pound or approximately 28.35 grams. It is used for food portions and small weight measurements.
Common uses of Ounce: food portions, postal mail, precious metals.
About Kilogram
The kilogram is the base unit of mass in the SI system. Since 2019, it is defined by the Planck constant rather than a physical artifact.
Fun Fact: Until 2019, the kilogram was defined by a platinum-iridium cylinder kept in Paris, called "Le Grand K."
Common uses of Kilogram: body weight, cooking, shipping.
Frequently Asked Questions
- How many Kilograms are in 1 Ounce?
- There are exactly 0.0283495231 Kilograms in 1 Ounce. This means the conversion factor from Ounce to Kilogram is 0.0283495231.
- What is the formula to convert Ounce to Kilogram?
- The formula to convert Ounce to Kilogram is: kg = oz × 0.0283495231. For example, to convert 10 Ounces to Kilograms, you would multiply 10 by 0.0283495231.
- What is a Ounce?
- The ounce (oz) equals 1/16 of a pound or approximately 28.35 grams. It is used for food portions and small weight measurements.
- What is a Kilogram?
- The kilogram is the base unit of mass in the SI system. Since 2019, it is defined by the Planck constant rather than a physical artifact.
- What are the common uses of Ounce?
- The Ounce is commonly used in food portions, postal mail, precious metals.
Related Mass Conversions
Cite this page
UnitConvertLab. (2026). Ounce to Kilogram converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/ounce-to-kilogram