Convert Ounce to Kilogram

What is a Ounce to Kilogram conversion?

One ounce (oz) is equal to 0.0283495231 kilogram (kg). This relationship is fixed by international measurement standards and does not change. To convert any number of ounce to kilogram, multiply your value by 0.0283495231; to go the other way, divide by 0.0283495231.

How to convert Ounce to Kilogram

The conversion formula is: 1 oz = 0.0283495231 kg. Enter any value into the converter above and the result updates instantly. The formula is also shown alongside the answer so you can check the working or use it in your own calculations.

Where is this conversion used?

Weight conversions are essential in cooking, fitness, postal services, scientific research, and international trade. The metric system uses grams and kilograms, while the imperial system uses ounces, pounds, and stones. Nutritionists, personal trainers, pharmacists, chemists, and logistics professionals work with weight conversions daily. In the UK, body weight is often quoted in stones and pounds, while most of the world uses kilograms.

Helpful tip

In everyday cooking, 1 cup of water weighs approximately 240 grams (8.5 oz), which is a handy reference point when scaling recipes between unit systems.