kg

What is a Kilogram?

Weight Unit

Definition

The kilogram is the base unit of mass in the International System of Units (SI). It is defined by the Planck constant and equals approximately 2.205 pounds.

Popular Kilogram Conversions

Most common conversions from Kilograms

1 kg = 1,000 g Kilogram to Grams 1 kg = 1,000,000 mg Kilogram to Milligrams 1 kg = 0.001 t Kilogram to Metric Tons 1 kg = 2.2046 lb Kilogram to Pounds 1 kg = 35.274 oz Kilogram to Ounces 1 kg = 0.157473 st Kilogram to Stones

History

The kilogram was originally defined in 1795 as the mass of one liter of water at 4°C. From 1889 to 2019, it was defined by a physical platinum-iridium cylinder kept in France. In 2019, it was redefined based on the Planck constant.

Common Uses

  • Body weight in most countries
  • Food and grocery measurements
  • Scientific and medical applications
  • International trade and commerce

Fun Facts

💡

The kilogram is the only SI base unit with a prefix in its name

💡

The original kilogram prototype is still preserved in Paris

💡

An average apple weighs about 0.2 kilograms

All Kilogram Conversions

Kilograms to Grams kg → g Kilograms to Milligrams kg → mg Kilograms to Metric Tons kg → t Kilograms to Pounds kg → lb Kilograms to Ounces kg → oz Kilograms to Stones kg → st Kilograms to US Tons kg → ton Kilograms to Imperial Tons kg → long ton Kilograms to Micrograms kg → μg

Related Units

g Gram lb Pound oz Ounce t Metric Ton st Stone