How many ounces are in a kilo

How many ounces are in a kilo? Here are 35.27 ounces in one kilogram (kg).

How to Convert Ounce to Kilogram?

1 oz = 0.0283495231 kg
1 kg = 35.2739619496 oz

Example: convert 15 oz to kg:
15 oz = 15 × 0.0283495231 kg = 0.4252428469 kg

Ounce to Kilogram Conversion Table

Ounce [oz] Kilogram [kg]
0.01 oz 0.0002834952 kg
0.1 oz 0.0028349523 kg
1 oz 0.0283495231 kg
2 oz 0.0566990463 kg
3 oz 0.0850485694 kg
5 oz 0.1417476156 kg
10 oz 0.2834952313 kg
20 oz 0.5669904625 kg
50 oz 1.4174761563 kg
100 oz 2.8349523125 kg
1000 oz 28.349523125 kg



  • An ounce (symbol: oz) is a unit of mass in the imperial and US customary systems of measurement.
  • The standard ounce (the avoirdupois ounce) is precisely 28.349523125 grams and is equivalent to one-sixteenth of an avoirdupois pound.


  • However, the origin of the term ounce stems from the Roman uncia, which means a “twelfth part,” and the use of a standardized copper bar that defined both the Roman pound and foot.
  • The copper bar was dividing into twelve equal parts, called unciae.
  • The Roman pound and foot relationship eventually contributed to the uncia being the basis of the modern inch and the typical ounce.
  • And also, the ounce has been used as a standard of mass throughout history for different applications and with different definitions.
  • However, instances include the Dutch metric ounce (100g), the French ounce (30.59g), and the Spanish ounce (28.75g), among others.
  • Here the current definition of the ounce, the international avoirdupois ounce, was adopted in 1959.

Current use:

  • An ounce is still a standard unit of mass in the US customary measurement system.
  • However, it is primarily used in the United States for measuring packaged food products, food portions, and postal items, among other things.
  • Here the ounce is still used in some other countries worldwide that have roots in British history and culture.
  • Payable to metrication, the United Kingdom (UK) no longer officially uses the ounce. And also, it is, however, still used in some settings in the UK, such as restaurants.



  • The kilogram (symbol: kg) is the base unit of mass in the International System of Units (SI).
  • However, it is currently defined based on the fixed numerical value of the Planck constant, h, which is equal to 6.62607015 × 10-34 in the units of J·s, or kg·m2·s-1.
  • However, the meter and the second are defined as c, the speed of light, and cesium frequency, ΔνCs.
  • Smooth though the definition of the kilogram was changed in 2019, the unit’s actual size remained the same.
  • Here the changes were intended to improve the definitions of SI base units, not actually to change how the units are used throughout the world.


The name kilo was derived from the French “kilogram,” which in turn came from adding Greek terminology meaning “a thousand,” before the Late Latin term “gramma,” meaning “a small weight.”

  • Here kilogram is the only SI base unit with an SI prefix, unlike the other SI base units. SI is based on the meter-kilogram-second system of units rather than a centimeter-gram-second system.
  • It is at least partly due to the inconsistencies and lack of coherence that can arise through the use of centimeter-gram-second systems.
  • And also, such as those between the methods of electrostatic and electromagnetic units.
  • Here kilogram was originally defined as the mass of one liter of water at its freezing point in 1794. Still, it was finally re-defined since measuring the mass of a volume of water was imprecise and cumbersome.
  • And also, a new meaning of the kilogram was introduced in 2019 based on Planck’s constant and changes to the second definition.
  • However, before the current report, the kilogram was defined as equal to the mass of a physical prototype, a cylinder made of a platinum-iridium alloy, which was an imperfect measure.
  • It is evidenced by the fact that the assembly of the original prototype for the kilogram now weighs 50 micrograms less than other copies of the standard kilogram.

Current use: 

  • By way of a base unit of SI, the kilogram is using globally in nearly all fields and applications, except in countries like the United States, where the kilogram is using in many areas.
  • At least to some extent (such as science, industry, government, and the military) but typically not in everyday applications.

Also Read: How many pounds are in a ton? – Kinds of Tons and More