Pounds to Ounces Converter (lb to oz)
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Convert Ounces to Pounds (oz to lb) ▶

Conversion Table

pounds to ounces
lboz
1 lb 16 oz
2 lb 32 oz
3 lb 48 oz
4 lb 64 oz
5 lb 80 oz
6 lb 96 oz
7 lb 112 oz
8 lb 128 oz
9 lb 144 oz
10 lb 160 oz
11 lb 176 oz
12 lb 192 oz
13 lb 208 oz
14 lb 224 oz
15 lb 240 oz
16 lb 256 oz
17 lb 272 oz
18 lb 288 oz
19 lb 304 oz
20 lb 320 oz

How to convert

1 pound (lb) = 16 ounce (oz). Pound (lb) is a unit of Weight used in Standard system. Ounce (oz) is a unit of Weight used in Standard system.

Pounds: A Unit of Weight

Definition of the Pound

A pound is a unit of weight that measures how much force an object or substance exerts on a scale due to gravity. It is equal to 0.45359237 kilograms, or 16 ounces, or 7000 grains. One pound can also be written as lb or lbs.

History of the Pound

The pound was originally defined in ancient Rome as the mass of a bronze bar called a libra, which was divided into 12 ounces. The libra was later adopted by various regions and countries in Europe, such as England, France and Germany, with different values and subdivisions.

The pound as we know it today is based on the avoirdupois system, which was developed in the 13th century in France and England. The avoirdupois pound was standardized in 1959 by an international agreement among the United States, Canada, Australia, New Zealand and South Africa as exactly 0.45359237 kilograms.

The pound, as well as other units of weight, such as the ounce and the ton, were introduced in the 19th century as part of the imperial system of measurement that aimed to unify the units used in the British Empire. The pound was officially adopted by the International System of Units (SI) in 1960 as one of the seven base units.

How to Convert Pounds

To convert pounds to other units of weight, we need to use conversion factors that relate the pound to the desired unit. For example, to convert pounds to kilograms, we need to know that one kilogram is equal to 2.2046226218 pounds. Therefore, one pound is equal to 0.45359237 kilograms.

Here are some common conversion factors for pounds:

  • 1 lb = 0.45359237 kg
  • 1 lb = 16 oz
  • 1 lb = 7000 gr
  • 1 lb = 0.0005 t
  • 1 lb = 0.0714285714 st

To convert from other units of weight to pounds, we need to use the inverse of these conversion factors. For example, to convert kilograms to pounds, we need to multiply by 2.2046226218.

Where Pounds are Used

The pound is a unit of weight that is widely used in the United States and some other countries that have historical ties with Britain, such as Canada and Australia. It is commonly used to measure the weight of people, animals, food, clothes and other everyday items. For example, an average adult male in the United States has a weight of about 198 lbs.

The pound is also used to measure some physical quantities such as force, pressure and torque. For example, one pound-force (lbf) is equal to one pound times the standard acceleration due to gravity (32.174 ft/s2).

Example Conversions of Pounds to Other Units

Here are some examples of how to convert pounds to other units of weight using the conversion factors given above:

  • 2 lb = 2 x 0.45359237 kg = 0.90718474 kg
  • 3 lb = 3 x 16 oz = 48 oz
  • 4 lb = 4 x 7000 gr = 28000 gr
  • 5 lb = 5 x 0.0005 t = 0.0025 t
  • 6 lb = 6 x 0.0714285714 st = 0.4285714284 st

Conclusion

The pound is a unit of weight that measures how much force an object or substance exerts on a scale due to gravity. It is equal to 0.45359237 kilograms, or 16 ounces, or 7000 grains. The pound is widely used in the United States and some other countries that have historical ties with Britain, such as Canada and Australia, as well as some physical quantities such as force, pressure and torque. To convert pounds to other units of weight, we need to use conversion factors that relate the pound to the desired unit.

Definition of the Ounce

The ounce is defined differently in different systems of measurement. The most common ounce is the international avoirdupois ounce, which is equal to 28.349523125 grams or 437.5 grains. This is the ounce that is used for most purposes, such as measuring food, postal items, fabric, paper and boxing gloves. The avoirdupois ounce is one-sixteenth of an avoirdupois pound, which is defined as 7000 grains.

Another ounce is the international troy ounce, which is equal to 31.1034768 grams or 480 grains. This is the ounce that is used for measuring precious metals and gems, such as gold, silver, platinum and diamonds. The troy ounce is one-twelfth of a troy pound, which is defined as 5760 grains.

A third ounce is the apothecaries’ ounce, which is also equal to 480 grains, but it is divided into eight drams instead of twelve pennyweights like the troy ounce. The apothecaries’ ounce is used for measuring medicines and drugs.

There are also other historical or regional ounces that have different values, such as the Spanish ounce, the French ounce, the Portuguese ounce, the Roman/Italian ounce, the Dutch metric ounce and the Chinese metric ounce.

How to Convert Ounces

Ounces can be converted to other units of weight by using conversion factors or formulas. Here are some examples of how to convert ounces to other units of weight in the US customary system and the SI system:

  • To convert ounces to pounds, divide by 16. For example, 32 oz = 32/16 = 2 lb.
  • To convert ounces to tons (short), divide by 32000. For example, 64000 oz = 64000/32000 = 2 tons.
  • To convert ounces to grams, multiply by 28.349523125. For example, 4 oz = 4 x 28.349523125 = 113.3980925 g.
  • To convert ounces to kilograms, multiply by 0.028349523125. For example, 8 oz = 8 x 0.028349523125 = 0.226796185 kg.
  • To convert ounces to milligrams, multiply by 28349.523125. For example, 2 oz = 2 x 28349.523125 = 56699.04625 mg.
  • To convert ounces to micrograms, multiply by 28349523.125. For example, 1 oz = 1 x 28349523.125 = 28349523.125 µg.

Where Ounces are Used

Ounces are used in different countries and regions for different applications and purposes. Here are some examples of where ounces are used:

  • In the United States, ounces are used for measuring packaged foods and food portions, postal items, areal density of fabric and paper, boxing gloves and firearms.
  • In the United Kingdom, ounces are used for measuring food portions and ingredients, woolen cloth and gold bullion.
  • In Canada, ounces are used for measuring food portions and ingredients, precious metals and gems and liquor bottles.
  • In Australia and New Zealand, ounces are used for measuring food portions and ingredients, precious metals and gems and baby weights.
  • In China, ounces are used for measuring tea leaves and pearls.
  • In India, ounces are used for measuring gold ornaments and silk fabrics.

History of Ounces

Ounces have a long history that dates back to ancient times. Here are some highlights of the history of ounces:

  • The uncia was an ancient Roman unit of measurement that was one-twelfth of a Roman pound or libra. It was also used as a unit of volume and area.
  • The uncia was borrowed into Old English as ynsan or yndsan from a Vulgar Latin form with ts for c before i (palatalization). This became inch in modern English.
  • The uncia was also borrowed into Middle English through Anglo-Norman and Middle French as unce, once or ounce. This became ounce in modern English.
  • The ounce was divided into different fractions and multiples, such as the dram, the pennyweight, the scruple and the mark.
  • The ounce was used in different systems of measurement, such as the imperial system, the US customary system, the troy system and the apothecaries’ system.
  • The ounce was standardized by international agreements, such as the international yard and pound agreement of 1959 and the international troy ounce agreement of 1958.

Example Conversions of Ounces to Other Units

Here are some examples of conversions of ounces to other units of weight:

  • 1 oz = 0.0625 lb
  • 1 oz = 0.00003125 ton
  • 1 oz = 28.349523125 g
  • 1 oz = 0.028349523125 kg
  • 1 oz = 28349.523125 mg
  • 1 oz = 28349523.125 µg
  • 1 oz = 0.911458333 troy oz
  • 1 oz = 0.911458333 apothecaries’ oz
  • 1 oz = 1.041666667 Spanish oz
  • 1 oz = 0.927272727 French oz



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