Pound to Kilogram

Minimal, fast, and accurate. Type a value, select units, get the result instantly.

Type a number to convert instantly.

Result

0.4536

kg

Conversion rate: 1 lb = 0.4536 kg

Showing up to 4 decimal

How it works

The converter uses exact SI-based factors (e.g., 1 foot = 0.3048 meters, 1 inch = 0.0254 meters).

Formula: kilograms = pound × 0.4536

Results show between 0 and 8 decimal places and hide trailing zeros for readability.

Conversion Table

Pound Kilogram
0.001 lb 0.0005 kg
0.01 lb 0.0045 kg
0.1 lb 0.0454 kg
0.5 lb 0.2268 kg
1 lb 0.4536 kg
5 lb 2.268 kg
10 lb 4.5359 kg
100 lb 45.3592 kg

History

Pound (lb)

The pound, symbol lb, is a unit of mass with origins in ancient Rome, where it was known as the libra. Standardized in England in the 14th century, the modern pound equals 0.453592 kilograms. Pounds remain in common use in the United States, Canada, and the UK for body weight, groceries, and various trades. The pound maintains continuity with traditional measurements while being used in parallel with metric units in international contexts. Its presence reflects the balance between imperial and metric systems.

Kilogram (kg)

The kilogram, symbolized as kg, is the SI base unit of mass, equivalent to 1,000 grams. Introduced in France in 1795, it was historically defined by a platinum-iridium physical prototype stored near Paris. In 2019, the kilogram was redefined by reference to the Planck constant for a universal and precise definition based on physics rather than an object. The kilogram is fundamental in science, industry, and daily life, providing a standardized unit of measurement for a broad range of applications. Its adoption ensures seamless consistency worldwide.

Other Relevant Conversions

kg → g kg → mg kg → t kg → lb kg → oz kg → st g → kg g → mg g → t g → lb g → oz g → st mg → kg mg → g mg → t mg → lb mg → oz mg → st t → kg t → g t → mg t → lb t → oz t → st lb → kg lb → g lb → mg lb → t lb → oz lb → st oz → kg oz → g oz → mg oz → t oz → lb oz → st st → kg st → g st → mg st → t st → lb st → oz