1 Ounce to Kilograms

1 oz ≈ 0.02835 kg

Calculation: kg = 1 oz × 0.0283495 ≈ 0.02835 kg

Ounce to Kilogram Converter

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How heavy is 1 oz?

1 oz (0.03 kg) is comparable to the weight of a small fruit like a kiwi or a deck of cards.

1 oz on the kilogram scale

oz00.511.52kg00.010.020.030.040.05

1 oz = 0.0283 kg

Did you know? A slice of bread is 0.028 kg.

A typical slice of sandwich bread weighs about 28 grams (1 oz).

How to Convert Ounce to Kilogram

1 ounce = 0.0283495 kilograms exact

Kilogram = Ounce × 0.0283495

Example: 1 oz × 0.0283495 = 0.02835 kg

Reverse Conversion

To convert kilograms back to ounces:

  • Remember, 1 kilogram equals 35.274 ounces.
  • To convert 0.02835 kg to oz, multiply 0.02835 x 35.274, resulting in 1 oz.

exact This conversion factor is exact by international definition.

1 oz is also equal to:

About these units

Ounce: The ounce (oz) is a unit of mass equal to one sixteenth of a pound in the avoirdupois system.

Kilogram: The kilogram (kg) is the SI base unit of mass. Since 2019, it is defined by fixing the numerical value of the Planck constant, ensuring stability independent of physical artifacts.The kilogram is univ...

Frequently Asked Questions

How much is 1 ounce in kilograms?

1 ounce equals 0.02835 kilograms. This is calculated by multiplying 1 by the conversion factor 0.0283495.

What does 1 ounce look like in kilograms?

1 ounce (0.02835 kilograms) is about the weight of a few coins or a small fruit.

How do you calculate 1 ounce to kilograms?

Multiply 1 by the conversion factor 0.0283495. The calculation is 1 × 0.0283495 = 0.02835 kilograms. This factor is defined by international measurement standards.

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1 ounce = 0.0283495 kilograms
1 ounce = 0.0283495 kilograms — conversion chart

Nearby Conversions

2 ounces0.0567 kilograms 3 ounces0.08505 kilograms 4 ounces0.1134 kilograms 5 ounces0.1417 kilograms 6 ounces0.1701 kilograms 7 ounces0.1984 kilograms 8 ounces0.2268 kilograms 9 ounces0.2551 kilograms 10 ounces0.2835 kilograms 11 ounces0.3118 kilograms

For general conversions between ounces and kilograms, see the ounces to kilograms converter.

Also convert Ounces to:

Conversion factors verified against NIST (National Institute of Standards and Technology), BIPM (International Bureau of Weights and Measures) 1 lb = 0.45359237 kg by international agreement (1959). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

All unit conversions on CoolConversion use conversion factors defined or documented by internationally recognised standards bodies (such as ISO and NIST), including both SI and non-SI units.