Pound (lb)

Definition

The pound (abbreviated as lb) is a unit of mass used in the imperial and U.S. customary systems. It is defined as exactly 0.45359237 kilograms.

History

The pound has roots in ancient Rome, where it was derived from the Latin word "libra." The unit was standardized in the 14th century, with various definitions evolving over the centuries. The avoirdupois pound became the most commonly used in the UK and the U.S. in the 19th century.

Uses

The pound is widely used in everyday life in the United States and some other countries for measuring weight, such as food products and personal body weight. It is also used in various fields, including construction, engineering, and aviation, where precise mass measurements are essential.

Conversions

• 1 lb = 0.45359237 kg (exact)
• 1 lb = 16 ounces (exact)
• 1 lb = 0.0005 tons (short ton)

Fun Facts

• The pound is often confused with the kilogram, but they are distinct units of measurement.
• The symbol "lb" originates from the Roman word "libra," which means scales or balance.