Convert ounces to kilograms instantly. Enter a value below, or use the formula and reference table further down the page.
In practice
Ounces to kilograms multiplies by 0.0283495, because one ounce is exactly 28.349523125 g. It is useful for converting American product weights, baby and pet food, and postal rates into metric: 16 oz (a pound) is 0.4536 kg, 35.3 oz is about a kilo, and a 5 lb bag of flour (80 oz) is 2.27 kg. Because ounces are small and kilograms large, the result is usually a decimal — it often reads better in grams. Do not confuse these weight ounces with fluid ounces, which measure volume.
How to convert ounces to kilograms
Multiply the value by 0.02834952313.
kg = oz × 0.02834952313Example: 10 oz = 0.2835 kg.
Ounces to Kilograms conversion table
| Ounces (oz) | Kilograms (kg) |
|---|---|
| 1 oz | 0.0283 kg |
| 2 oz | 0.0567 kg |
| 3 oz | 0.085 kg |
| 4 oz | 0.1134 kg |
| 5 oz | 0.1417 kg |
| 10 oz | 0.2835 kg |
| 15 oz | 0.4252 kg |
| 20 oz | 0.567 kg |
| 25 oz | 0.7087 kg |
| 50 oz | 1.4175 kg |
| 100 oz | 2.835 kg |
Frequently asked questions
How many kilograms is 1 ounce?
1 ounce equals 0.0283 kilograms.
What is the formula to convert oz to kg?
To convert oz to kg, multiply the value by 0.02834952313. The full formula is: kg = oz × 0.02834952313.
How do I convert kilograms back to ounces?
Use the same calculator above and type your value into the kilograms field instead — it converts in both directions. Or use the reverse formula: oz = kg ÷ 0.02834952313.
Is the oz to kg conversion exact?
The conversion factor used here (0.02834952313) is the standard internationally defined value. Results on this page are rounded to four decimal places for readability.