One ounce is 0.0283495 kg — about 35.27 oz make a kilogram. Useful when a US shipping weight or recipe in ounces has to match a metric scale or a per-kilogram price.
Where you'll meet this conversion
- A 16 oz (1 lb) steak is 0.454 kg.
- A 5 oz smartphone is 0.142 kg.
- 100 oz of silver is 3.11 kg (troy ounces are 31.1 g each — see below).
Common mistake
Mixing avoirdupois ounces (28.35 g, everyday goods) with troy ounces (31.10 g, precious metals) or fluid ounces (a volume).
Quick answer: one ounce equals 0.02835 kilograms. So to convert ounces to kilograms, multiply by 0.02834952.
How to convert ounces to kilograms
kilograms = ounces × 0.0283495231
The avoirdupois ounce is exactly 28.349523125 grams. It dominates American recipe and food-label weights and is one sixteenth of a pound.
The kilogram is the SI base unit of mass, since 2019 defined via the Planck constant rather than a physical metal cylinder in Paris.
Ounce to Kilogram conversion table
| Ounce (oz) | Kilogram (kg) |
|---|---|
| 0.01 oz | 0.0002835 kg |
| 0.1 oz | 0.002835 kg |
| 0.25 oz | 0.007087 kg |
| 0.4 oz | 0.01134 kg |
| 0.75 oz | 0.021262 kg |
| 1.25 oz | 0.035437 kg |
| 1.75 oz | 0.049612 kg |
| 2.5 oz | 0.070874 kg |
| 3.5 oz | 0.099223 kg |
| 4.5 oz | 0.127573 kg |
| 6 oz | 0.170097 kg |
| 8 oz | 0.226796 kg |
| 10 oz | 0.283495 kg |
| 12 oz | 0.340194 kg |
| 14 oz | 0.396893 kg |
| 16 oz | 0.453592 kg |
| 18 oz | 0.510291 kg |
| 20 oz | 0.56699 kg |
| 24 oz | 0.680389 kg |
| 26 oz | 0.737088 kg |
| 30 oz | 0.850486 kg |
| 35 oz | 0.992233 kg |
| 45 oz | 1.2757 kg |
| 55 oz | 1.5592 kg |
| 65 oz | 1.8427 kg |
| 75 oz | 2.1262 kg |
| 85 oz | 2.4097 kg |
| 95 oz | 2.6932 kg |
| 110 oz | 3.1184 kg |
| 125 oz | 3.5437 kg |
| 175 oz | 4.9612 kg |
| 250 oz | 7.0874 kg |
| 350 oz | 9.9223 kg |
| 450 oz | 12.7573 kg |
| 600 oz | 17.0097 kg |
| 750 oz | 21.2621 kg |
| 900 oz | 25.5146 kg |
| 1,500 oz | 42.5243 kg |
| 2,500 oz | 70.8738 kg |
| 10,000 oz | 283.4952 kg |
Need the opposite direction? Use the Kilogram to Ounce converter, or read our complete guide to weight conversions for every formula in one place.
Frequently asked questions
How many kilograms are in one ounce?
One ounce equals 0.02835 kilograms. Multiply any ounce value by 0.02834952 to get kilograms.
What is 10 ounces in kilograms?
10 ounces equal 0.283495 kilograms (10 × 0.02835).
Is the ounce to kilogram conversion exact?
The conversion factor used here (0.0283495231) is based on the internationally agreed definitions of both units, so results are exact up to rounding of the final decimal places.
Is my data stored when I use this converter?
No. The conversion runs entirely in your browser with JavaScript — nothing you type is sent to a server, logged or stored.