Ounces to kilograms
1 ounce = 0.0283495 kilograms
Type a value in ounces (oz) to get kilograms (kg) straight away. An ounce is smaller than a kilogram, so the number goes down. Both units belong to weight, measured here against the kilogram.
1 oz = 0.028349523 kg
Formula
kg = oz × 0.028349523
One ounce is 0.028349523 kilograms, so multiply by that factor. You can also divide by 35.274, the number of ounces in one kilogram. Here oz is the value in ounces and kg is the result in kilograms.
Worked example: 16 ounces × 0.028349523 = 0.453592 kilograms.
Ounces to kilograms table
| ounces (oz) | kilograms (kg) |
|---|---|
| 1 oz | 0.0283495 kg |
| 2 oz | 0.056699 kg |
| 3 oz | 0.0850486 kg |
| 4 oz | 0.113398 kg |
| 5 oz | 0.141748 kg |
| 6 oz | 0.170097 kg |
| 7 oz | 0.198447 kg |
| 8 oz | 0.226796 kg |
| 9 oz | 0.255146 kg |
| 10 oz | 0.283495 kg |
| 15 oz | 0.425243 kg |
| 20 oz | 0.56699 kg |
| 25 oz | 0.708738 kg |
| 30 oz | 0.850486 kg |
| 40 oz | 1.13398 kg |
| 50 oz | 1.41748 kg |
| 60 oz | 1.70097 kg |
| 75 oz | 2.12621 kg |
| 100 oz | 2.83495 kg |
Everyday ounces in kilograms
| What it is | oz | kg |
|---|---|---|
| a slice of bread (about) | 1 oz | 0.0283495 kg |
| a quarter pound | 4 oz | 0.113398 kg |
| a half pound | 8 oz | 0.226796 kg |
| a 100 g chocolate bar (about) | 3.5 oz | 0.0992233 kg |
| one pound | 16 oz | 0.453592 kg |
Quick estimate in your head
Multiply by about 0.028. For 16 oz that gives 0.448 kg against an exact 0.453592 kg, an error of 1.2%.
Watch out for
- Do not mix up ounces (weight) with fluid ounces (volume), and gold is priced in troy ounces of 31.1 g, not 28.35 g.
About the units
Ounce (oz). 1/16 of a pound, about 28.35 g. Used for food portions in the US.
Kilogram (kg). The SI base unit of mass, defined through the Planck constant since 2019.
Going the other way, 1 kilogram is 35.274 ounces.
Questions
How many kilograms are in 1 ounce?
1 ounce is 0.0283495 kilograms, and 1 kilogram is 35.274 ounces.
How do I convert ounces to kilograms?
Use kg = oz × 0.028349523. For example, 16 ounces × 0.028349523 = 0.453592 kilograms.
Is the ounce to kilogram factor exact?
Yes, the definitions are exact, so the factor is exact. Results here are rounded to 6 significant digits for display.
How much is one pound in kilograms?
16 oz is 0.453592 kg.
Source for the conversion factor: NIST SP 811, Appendix B (conversion factors).
Related conversions
- kilograms to ounces
- kilograms to pounds
- pounds to kilograms
- ounces to grams
- kilograms to grams
- grams to kilograms