Pound conversions

About pound

The international avoirdupois pound (also pound-mass or simply "pound") is a unit of mass in the Imperial and US customary systems of units equal to 0.45359237 kilograms (1 lb = 0.45359237 kg), the base unit of mass in the International System of Units (SI).

One pound (lb) is also equal to 453.59237 grams (g), or 453,592.37 milligrams (mg) or 453.59237 × 10⁶ micrograms (μg) (SI units of mass), or 16 ounces (oz), or 7,000 grains (gr) or 1.2152777(7) troy pounds (lb t), which are US customary / Imperial units of mass.

The pound definition varies depending on the system of units used, as follows:

• The avoirdupois pound (or simply "pound"), equal to 453.59237 × 10^-3 kilograms
• The troy pound, equal to 373.2417216 × 10^-3 kilograms
• The metric pound, equal to 500 × 10^-3 kilograms

Over time, various pounds have been recorded. Examples of pound units include:

• The tower pound, equal to about 350 × 10^-3 kilograms
• The merchant's pound, equal to about 437.5 × 10^-3 kilograms
• The London pound, equal to about 466.66 × 10^-3 kilograms
• The Roman libra, equal to about 327 × 10^-3 kilograms
• The Russian pound (or funt), equal to about 409.52 × 10^-3 kilograms
• The Jersey pound, equal to about 490 × 10^-3 kilograms

Notes:
(i) The name "pound" comes from the Latin phrase "libra pondo" which means "a pound weight"
(ii) The abbreviation "lb" for pound comes from the Roman "libra"; the "lbs" abbreviation is also commonly used to indicate the plural unit "pounds"

Symbol: lb

Plural: pounds

Also called: pound (plural: pounds, symbol: lb, lbs (informal)), pound-mass (symbol: lbm)