Ounces to Kilograms Converter
Convert ounces to kilograms instantly. One ounce equals exactly 0.02834952 kilograms. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert ounces to kilograms
Worked example: convert 64 ounces to kilograms. Using kilograms ← ounces × 0.02834952313, we get 64 × 0.02834952313 = 1.8143695 kg. To check the result, convert back: 1.8143695 kg ÷ 0.02834952313 = 64 oz.
Ounces to kilograms chart
| Ounces (oz) | Kilograms (kg) |
|---|---|
| 1 oz | 0.02834952 kg |
| 2 oz | 0.05669905 kg |
| 3 oz | 0.08504857 kg |
| 4 oz | 0.1133981 kg |
| 5 oz | 0.1417476 kg |
| 6 oz | 0.1700971 kg |
| 8 oz | 0.2267962 kg |
| 10 oz | 0.2834952 kg |
| 12 oz | 0.3401943 kg |
| 15 oz | 0.4252428 kg |
| 20 oz | 0.5669905 kg |
| 25 oz | 0.7087381 kg |
| 30 oz | 0.8504857 kg |
| 40 oz | 1.133981 kg |
| 50 oz | 1.417476 kg |
| 75 oz | 2.126214 kg |
| 100 oz | 2.834952 kg |
| 150 oz | 4.252428 kg |
| 200 oz | 5.669905 kg |
| 250 oz | 7.087381 kg |
| 500 oz | 14.17476 kg |
| 1,000 oz | 28.34952 kg |
Kilograms to ounces (reverse)
| Kilograms (kg) | Ounces (oz) |
|---|---|
| 1 kg | 35.27396 oz |
| 2 kg | 70.54792 oz |
| 5 kg | 176.3698 oz |
| 10 kg | 352.7396 oz |
| 20 kg | 705.4792 oz |
| 50 kg | 1,763.698 oz |
| 100 kg | 3,527.396 oz |
| 250 kg | 8,818.49 oz |
| 500 kg | 17,636.98 oz |
| 1,000 kg | 35,273.96 oz |
About the ounce and the kilogram
The avoirdupois ounce is one sixteenth of a pound. It appears on US food packaging, postal rates and kitchen scales. Fluid ounces measure volume and are a different unit, and precious metals use the heavier troy ounce of 31.1035 grams.
The kilogram is the SI base unit of mass. Since May 2019 it has been defined using the Planck constant instead of the old platinum-iridium cylinder kept near Paris. It is used for body weight and groceries in most countries.
One kilogram equals 35.27396 ounces, which makes the kilogram the heavier unit of the two.
Everyday sizes in ounces and kilograms
| Everyday example (approximate) | In ounces | In kilograms |
|---|---|---|
| A US stick of butter | 3.986 oz | 0.113 kg |
| A smartphone | 6.7021 oz | 0.19 kg |
| A liter of water | 35.274 oz | 1 kg |
| A newborn baby | 119.93 oz | 3.4 kg |
| A bowling ball (maximum) | 256.09 oz | 7.26 kg |
| An average adult | 2,645.5 oz | 75 kg |
Ounces to kilograms FAQ
How many kilograms are in one ounce?
One ounce equals exactly 0.02834952313 kilograms. In the other direction, one kilogram equals 35.273962 ounces.
How do I convert ounces to kilograms without a calculator?
convert 64 ounces to kilograms. Using kilograms ← ounces × 0.02834952313, we get 64 × 0.02834952313 = 1.8143695 kg. To check the result, convert back: 1.8143695 kg ÷ 0.02834952313 = 64 oz. For a quick estimate, round the factor to 0.028. Then 64 oz is about 1.792 kg, compared with the exact 1.81437 kg (an error of 1.2%). That is close enough for planning, but use the calculator above when the number matters.
What is a newborn baby in kilograms?
A newborn baby is about 119.93 ounces, which is 3.4 kilograms. Treat that as an approximate everyday figure rather than an official measurement.
Are the ounces and kilograms the same in every country?
The avoirdupois ounce is exactly 28.349523125 g; the troy ounce (31.1035 g) is a different unit used for gold and silver. The kilogram is defined from the Planck constant, so it is the same everywhere.