What is an ounces to kilograms converter?
An ounces to kilograms converter is an online tool that turns a weight given in ounces (oz), a unit from the imperial and US customary systems, into kilograms (kg), the metric base unit of mass. It also works the other way, converting kilograms back into ounces, so you can move between the two systems in either direction.
Ounces are widely used in the United States and the United Kingdom for food portions, cooking and small items, while kilograms are the metric standard used almost everywhere else and throughout science and trade. Converting between them is handy when following an international recipe, comparing package weights or interpreting instructions written for a different system.
How does it work?
The conversion relies on a fixed relationship: one ounce equals approximately 0.028349523 kilograms (because one ounce is 28.349523125 grams, and there are 1000 grams in a kilogram). To convert ounces to kilograms you multiply by this factor, and to convert kilograms to ounces you divide by it.
The underlying relationship is exact; the factor above is simply rounded for convenience, so answers are accurate to well within everyday needs.
Formula
To convert ounces to kilograms, multiply the weight in ounces by 0.028349523:
To convert kilograms to ounces, divide by the same factor (equivalently, multiply by about 35.274):
Example conversions
Convert 16 ounces to kilograms
So 16 ounces (one pound) is approximately 0.4536 kilograms.
Convert 1 kilogram to ounces
One kilogram is therefore about 35.27 ounces.
Conversion table
| Ounces (oz) | Kilograms (kg) |
|---|---|
| 1 | 0.0283 |
| 8 | 0.2268 |
| 16 | 0.4536 |
| 32 | 0.9072 |
| 50 | 1.4175 |
| 100 | 2.8350 |
Notes
- Sixteen ounces make one pound, so 16 oz is the same as the familiar 0.4536 kg pound value.
- The ounce here is the avoirdupois ounce used for everyday weight, not the troy ounce used for precious metals.
- For finer measurements you may prefer working in grams; see our ounces to grams converter.
Frequently asked questions
How many kilograms are in an ounce?
There are about 0.028349523 kilograms in one avoirdupois ounce, or roughly 0.0283 kg.
How do I convert ounces to kilograms quickly?
Multiply the number of ounces by about 0.0283, or divide by roughly 35 to get a fast estimate.
How many ounces are in a kilogram?
One kilogram is about 35.274 ounces, which is a little more than two pounds.
Is an ounce a large amount in kilograms?
No. An ounce is a small mass; it takes more than 35 ounces to make a single kilogram.