Convertir libras a kg
Proporcione los valores a continuación para convertir libras [lbs] a kilogramos [kg], o viceversa .
Libra
Definición: Una libra (símbolo: lb) es una unidad de masa utilizada en los sistemas de medición imperial y estadounidense. La libra avoirdupois internacional (la libra común que se usa hoy en día) se define exactamente como 0,45359237 kilogramos. La libra de avoirdupois equivale a 16 onzas de avoirdupois.
Historia/origen: La libra descendió de la libra romana, y se usaron numerosas definiciones diferentes de la libra a lo largo de la historia antes de la libra avoirdupois internacional que se usa ampliamente en la actualidad. El sistema avoirdupois es un sistema que se usaba comúnmente en el siglo XIII . Se actualizó a su forma actual en 1959. Es un sistema que se basó en una libra física estandarizada que usaba un peso prototipo. Este prototipo de peso se podía dividir en 16 onzas, un número que tenía tres divisores pares (8, 4, 2). Esta conveniencia podría ser la razón por la cual el sistema fue más popular que otros sistemas de la época que usaban 10, 12 o 15 subdivisiones.
Uso actual: la libra como unidad de peso se usa ampliamente en los Estados Unidos, a menudo para medir el peso corporal. En el pasado, existían muchas versiones de la libra en el Reino Unido (RU), y aunque el Reino Unido usa en gran medida el Sistema Internacional de Unidades, las libras todavía se usan dentro de ciertos contextos, como el etiquetado de alimentos envasados (por ley, los valores métricos deben también se mostrará). El Reino Unido también suele utilizar libras y piedras al describir el peso corporal, donde una piedra se compone de 14 libras.
Kilogramo
Definition: A kilogram (symbol: kg) is the base unit of mass in the International System of Units (SI). 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. The meter and the second are defined in terms of c, the speed of light, and cesium frequency, ΔνCs. Even though the definition of the kilogram was changed in 2019, the actual size of the unit remained the same. The changes were intended to improve the definitions of SI base units, not to actually change how the units are used throughout the world.
History/origin: The name kilogram was derived from the French "kilogramme," which in turn came from adding Greek terminology meaning "a thousand," before the Late Latin term "gramma" meaning "a small weight."
Unlike the other SI base units, the kilogram is the only SI base unit with an SI prefix. SI is a system based on the meter-kilogram-second system of units rather than a centimeter-gram-second system. This is at least in part due to the inconsistencies and lack of coherence that can arise through use of centimeter-gram-second systems, such as those between the systems of electrostatic and electromagnetic units.
The kilogram was originally defined as the mass of one liter of water at its freezing point in 1794, but was eventually re-defined, since measuring the mass of a volume of water was imprecise and cumbersome.
A new definition of the kilogram was introduced in 2019 based on Planck's constant and changes to the definition of the second. Prior to the current definition, the kilogram was defined as being equal to the mass of a physical prototype, a cylinder made of a platinum-iridium alloy, which was an imperfect measure. This is evidenced by the fact that the mass of the original prototype for the kilogram now weighs 50 micrograms less than other copies of the standard kilogram.
Current use: As a base unit of SI, the kilogram is used globally in nearly all fields and applications, with the exception of countries like the United States, where the kilogram is used in many areas, at least to some extent (such as science, industry, government, and the military) but typically not in everyday applications.
Pound to Kilogram Conversion Table
| Pound [lbs] | Kilogram [kg] |
|---|---|
| 0.01 lbs | 0.0045359237 kg |
| 0.1 lbs | 0.045359237 kg |
| 1 lbs | 0.45359237 kg |
| 2 lbs | 0.90718474 kg |
| 3 lbs | 1.36077711 kg |
| 5 lbs | 2.26796185 kg |
| 10 lbs | 4.5359237 kg |
| 20 lbs | 9.0718474 kg |
| 50 lbs | 22.6796185 kg |
| 100 lbs | 45.359237 kg |
| 1000 lbs | 453.59237 kg |
How to Convert Pound to Kilogram
1 lbs = 0.45359237 kg
1 kg = 2.2046226218 lbs
Example: convert 15 lbs to kg:
15 lbs = 15 × 0.45359237 kg = 6.80388555 kg