Ounces (oz) to Kilograms (kg) Conversion
Ounces
The ounce (avoirdupois) is a unit of mass equal to exactly 28.349523125 grams, or one sixteenth of a pound, used in the United States and United Kingdom for food portions, postal weights, and product labelling. It must be distinguished from the troy ounce (31.1035 g), used exclusively for precious metals, and from the fluid ounce, which is a unit of volume.
Kilograms
The kilogram is the SI base unit of mass. From 1889 to 2019, it was defined by the International Prototype of the Kilogram — a physical cylinder of platinum-iridium alloy stored near Paris. In 2019, the kilogram was redefined in terms of Planck's constant (h = 6.62607015 × 10⁻³⁴ J·s), making it the first base unit defined entirely by a fundamental constant of nature. This eliminated the risk of the kilogram gradually changing mass due to contamination of the physical prototype.
| Ounces (oz) | Kilograms (kg) |
|---|---|
| 0.1 oz | 0.0028349523125 kg |
| 1 oz | 0.028349523125 kg |
| 2 oz | 0.05669904625 kg |
| 3 oz | 0.085048569375 kg |
| 5 oz | 0.141747615625 kg |
| 10 oz | 0.28349523125 kg |
| 20 oz | 0.5669904625 kg |
| 30 oz | 0.85048569375 kg |
| 50 oz | 1.41747615625 kg |
| 100 oz | 2.8349523125 kg |
| 1000 oz | 28.349523125 kg |
Frequently Asked Questions (FAQ)
How many kilograms are in 1 ounces?
1 ounces (oz) is exactly 0.02835 kilograms (kg).
How do I convert ounces to kilograms?
Multiply the value in ounces by 0.02835 to get the result in kilograms. Or use the converter above — type any number and see the result instantly.