Convert oz to kg

Ounce

Definición
An ounce (symbol: oz) is a unit of mass in the Imperial and U.S. customary systems. The international avoirdupois ounce is exactly 28.349523125 g—one-sixteenth of an avoirdupois pound.

Orígenes
The word “ounce” comes from the Latin uncia, meaning “twelfth part.” In ancient Rome, a standard copper bar defining both the pound and foot was divided into twelve unciae. Over centuries, regional variants existed (e.g., Dutch ≈ 100 g, French ≈ 30.59 g, Spanish ≈ 28.75 g) until the modern ounce was fixed by international agreement in 1959.

Usage Today
Ounces remain the default in the U.S. for food packaging, portion sizes, postal rates, and more. While the U.K. is officially metric, you’ll still see ounces in menus, recipes, and specialty retail contexts.

Kilogram

Definición
A kilogram (symbol: kg) is the base unit of mass in the International System of Units (SI). Since 2019, it is defined by assigning Planck’s constant an exact value (h = 6.62607015 × 10⁻³⁴ J·s), with the metre and second tied to the speed of light and cesium-133 frequency.

Orígenes
“Kilogram” derives from the French kilogramme—Greek kilo- (“thousand”) + Latin gramma (“small weight”). Originally (1794) it matched the mass of one litre of water at freezing point; later, a platinum-iridium cylinder served as the standard until tiny drifts led to the 2019 constants-based definition.

Usage Today
The kilogram underpins virtually all mass measurements worldwide—in science, industry, trade, and daily life—becoming the universal standard for groceries, shipping, and personal weight in nearly every country.

Ounce → Kilogram Conversion Table

Cómo convertir

• 1 oz = 0.0283495231 kg

• 1 kg = 35.2739619496 oz

Ejemplo

To convert 15 oz to kilograms:

15 oz × 0.0283495231 = 0.4252428469 kg