Convert Ounces to Kilograms
Convert Ounces (oz) to Kilograms (kg) instantly and accurately.
Conversion Formula
kg = oz × 0.02834952313
About Ounces
The avoirdupois ounce (oz) is 1/16 of a pound, equal to approximately 28.35 grams. It is the everyday ounce used in the United States and United Kingdom for food portions, household quantities, and general trade. US food packages, recipe measurements, and nutrition labels reference ounces; a standard stick of butter is 4 oz, a can of soup typically 10.75 oz, and a baseball weighs 5-5.25 oz. Unlike the troy ounce (31.10 g) used for precious metals, the avoirdupois ounce (28.35 g) is lighter.
About Kilograms
The kilogram (kg) is the SI base unit of mass - the fundamental unit from which all other mass measurements in the metric system are derived. Since 2019 it has been defined by fixing the Planck constant h to exactly 6.62607015 × 10⁻³⁴ J·s, replacing the 130-year-old International Prototype Kilogram (a platinum-iridium cylinder kept in Sèvres, France). The kilogram governs daily life worldwide: body weight in most countries, grocery shopping, luggage allowances, postal rates, freight pricing, and ingredient quantities in cooking all reference kilograms.
Quick Reference Table
| Ounces (oz) | Kilograms (kg) |
|---|---|
| 1 oz | 0.0283495 kg |
| 2 oz | 0.056699 kg |
| 5 oz | 0.141748 kg |
| 10 oz | 0.283495 kg |
| 25 oz | 0.708738 kg |
| 50 oz | 1.41748 kg |
| 100 oz | 2.83495 kg |