The kilogram (also kilogramme) is the base unit of mass in the metric system having the unit symbol kg. It is a widely used measure in science, engineering, and commerce worldwide, and is often called a kilo. The kilogram is about to the mass of one litre of water.

It is a calculator or tool used to convert lbs (pounds) to kgs (kilograms).

1 pound (lb) is equal to 0.45359237 kilograms (kg).1 lb = 0.45359237 kgThe mass m in kilograms (kg) is equal to the mass m in pounds (lb) times 0.45359237: m(kg) = m(lb) × 0.45359237
ExampleConvert 10 lb to kilograms: m(kg) = 10 lb × 0.45359237 = 4.536 kg

The gram (alternative spelling: gramme; SI unit symbol: g; Latin: gramma, from Greek γράμμα, grámma) is a metric system unit of mass.
Originally defined as "the absolute weight of a volume of pure water equal to the cube of the hundredth part of a meter [1 cm^3], and at the temperature of melting ice" (later at 4 °C, the temperature of maximum density of water). However, in a reversal of reference and defined units, a gram is now defined as one-thousandth of the SI base unit, the kilogram, or 1×10−3 kg, which itself is now defined by the International Bureau of Weights and Measures, not in terms of grams, but by "the amount of electricity needed to counteract its force."