Kilograms to Ounces
Type a value in either box to convert between kilograms and ounces. The factor is 35.274.
| Kilograms | Ounces |
|---|---|
| 1 kg | 35.273962 oz |
| 2 kg | 70.547924 oz |
| 3 kg | 105.821886 oz |
| 5 kg | 176.36981 oz |
| 10 kg | 352.739619 oz |
| 25 kg | 881.849049 oz |
| 50 kg | 1763.698097 oz |
| 100 kg | 3527.396195 oz |
How to use
- Enter a value in the Kilograms field.
- The Ounces figure appears immediately — no button to press.
- Typing in the Ounces field converts back to Kilograms the same way.
- Use the reference table for the values that come up most often.
Kilograms to Ounces formula
Converting kilograms to ounces is a single multiplication by 35.2739619.
oz = kg × 35.2739619
Why this factor: the kilogram and the ounce are both defined against the kilogram, so dividing one definition by the other gives 35.2739619 directly. Both definitions are set out in full below.
To go the other way, divide by 35.2739619 — or use the Ounces to Kilograms converter, which is the same calculation reversed.
Worked example
Given 2 kg, multiplying by 35.2739619 yields 70.547924 oz.
2 kg × 35.2739619 = 70.547924 oz
The converter above does this for any value you type, in either direction.
What is a kilogram?
The kilogram is the SI base unit of mass — the reference for every other mass unit.
Definition: Since 2019 the kilogram has been defined by fixing the Planck constant at exactly 6.62607015×10⁻³⁴ joule-seconds, retiring the physical platinum-iridium cylinder that defined it for 130 years.
Where it is used: Universal in science, trade and everyday weighing outside the United States.
What is an ounce?
An ounce is one sixteenth of a pound, used for small weights in the US.
Definition: Exactly 28.349523125 grams — one sixteenth of the international avoirdupois pound.
Where it is used: Food packaging, postal weights, and coffee and spice quantities in the US.
Worth knowing: Not the same as a fluid ounce, which measures volume. Also distinct from the troy ounce (31.103 g) used for gold and silver.
Kilograms vs Ounces
The kilogram is an SI unit while the ounce is an imperial unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many ounces are in a kilogram?
One kilogram equals 35.2739619 ounces.
What is the formula to convert kilograms to ounces?
Multiply the number of kilograms by 35.2739619. To reverse it, divide by 35.2739619 instead.
How do I convert ounces back to kilograms?
Divide by 35.2739619, which is the same as multiplying by 0.0283495231.
How many ounces are in 10 kilograms?
10 kg works out to 352.739619 oz.
Is there anything to watch out for with ounces?
Not the same as a fluid ounce, which measures volume. Also distinct from the troy ounce (31.103 g) used for gold and silver.
How is the kilogram defined?
Since 2019 the kilogram has been defined by fixing the Planck constant at exactly 6.62607015×10⁻³⁴ joule-seconds, retiring the physical platinum-iridium cylinder that defined it for 130 years.