Ounces to Kilograms Converter
Convert ounces to kilograms — one ounce is 28.3495 grams, so 35.274 ounces make a kilogram. Results update as you type; exact factors shown.
One ounce is 0.0283 kilograms — see the exact factor, not a rounded rule of thumb.
How the ounces to kilograms converter works
Mass converts through the kilogram. The avoirdupois pound has been exactly 0.45359237 kg since 1959, so an ounce is 28.349523125 g and a stone (14 lb) is 6.35029318 kg. A US short ton is 2,000 lb; an imperial long ton is 2,240 lb; a metric tonne is 1,000 kg.
Australia is fully metric under the National Measurement Act 1960; imperial units appear only in trade with the US and in older documents.
Common mass conversions
| From | To | Units |
|---|---|---|
| 1 oz | 0.0283 kg | ounce to kilograms |
| 4 oz | 0.1134 kg | ounces to kilograms |
| 8 oz | 0.2268 kg | ounces to kilograms |
| 12 oz | 0.3402 kg | ounces to kilograms |
| 16 oz | 0.4536 kg | ounces to kilograms |
| 20 oz | 0.567 kg | ounces to kilograms |
| 24 oz | 0.6804 kg | ounces to kilograms |
| 32 oz | 0.9072 kg | ounces to kilograms |
| 35.274 oz | 1 kg | ounces to kilograms |
| 48 oz | 1.3608 kg | ounces to kilograms |
| 64 oz | 1.8144 kg | ounces to kilograms |
| 100 oz | 2.835 kg | ounces to kilograms |
Units in this converter and their exact factors
| Unit | Symbol | One unit in kilograms |
|---|---|---|
| milligram | mg | 0.000001 kilogram |
| gram | g | 0.001 kilogram |
| kilogram | kg | 1 kilogram |
| tonne (metric ton) | t | 1,000 kilogram |
| ounce | oz | 0.0283495231 kilogram |
| pound | lb | 0.45359237 kilogram |
| stone | st | 6.35029318 kilogram |
| US ton (short) | US ton | 907.18474 kilogram |
| imperial ton (long) | long ton | 1,016.0469088 kilogram |
FAQFrequently asked questions about mass conversion
How many ounces in a kilogram?
35.274 ounces.
What is 16 oz in kg?
0.4536 kg — a pound.
Why is the ounce 28.3495 g?
It follows from the international pound of exactly 0.45359237 kg, divided by sixteen.
Is a fluid ounce the same?
No — a fluid ounce measures volume, not mass. They only coincide for water, and even then only roughly.
What is a troy ounce?
A different unit, 31.103 g, used for precious metals. This page uses the ordinary avoirdupois ounce.
Where these figures come from
- BIPM — The International System of Units (SI Brochure, 9th edition) — definitions of the base and derived units.
- NIST Special Publication 811 — Guide for the Use of the International System of Units — the exact conversion factors used here.
- National Measurement Institute (NMI) — Australia's national measurement authority.
Last checked: September 2026. Conversion factors are fixed by definition and do not change with tax years or regulations.