ConvBolt — Unit ConverterOunces to Kilograms Converter
Converting ounces to kilograms is a multiplication by a fixed factor: 1 oz = 0.02834952 kg. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one ounce works out to 0.02834952 kg, the kilogram is the far smaller unit of the two: a figure given in kilogram always carries a smaller number than the same measurement in ounce. A chart drawn in oz can hide that, so check which label the axis uses before you compare two readings.
Where a legal or postal limit is set in kilograms, the same limit expressed in ounces has to be exact — an overshoot of even one unit can change the chargeable band.
The conversion factor used here is 0.02834952 kg per ounce (8 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 oz a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 35.27396 oz per kg, the exact reciprocal, so a round trip through both pages returns your original number.
Ounces to Kilograms formula
Use this formula to convert any ounce value to kilograms:
Worked example: 100 oz × 0.02834952 = 2.834952 kg.
Ounces to Kilograms conversion table
| Ounces (oz) | Kilograms (kg) |
|---|---|
| 0.5 oz | 0.01417476 kg |
| 1 oz | 0.02834952 kg |
| 2 oz | 0.05669905 kg |
| 5 oz | 0.1417476 kg |
| 10 oz | 0.2834952 kg |
| 20 oz | 0.5669905 kg |
| 50 oz | 1.417476 kg |
| 100 oz | 2.834952 kg |
| 500 oz | 14.17476 kg |
| 1000 oz | 28.34952 kg |
How to convert ounces to kilograms
Multiply the ounce value by 0.02834952 to get the equivalent in kilograms. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Kilograms to Ounces converter instead of dividing by hand; both pages use the same source factors. For every other oz conversion in one place, see the oz conversion hub.
Frequently asked questions
How many kilograms are in 1 ounce?
1 ounce = 0.02834952 kg.
What is 100 ounces in kilograms?
100 oz = 2.834952 kg.
Is converting ounces to kilograms the same as kilograms to ounces?
No — the direction changes the multiplier. The reverse conversion (1 kg = 35.27396 oz) is on the Kilograms to Ounces page.
Related conversions
Try the ConvBolt Unit Converter for any other weight unit, browse the Weight conversions, or read our conversion guides.