# Common Units of Weight Measurement

Weight is the name given to the force on an object due to gravity.

## Here are some common units of weight measurement:

### Kilogram

Kilogram (symbol: kg) is the base unit of mass in the International System of Units (SI, from the French Système international d’unités), which is the modern standard governing the metric system.

### Pound

Pound or pound-mass (abbreviations:lb, lbm, lbm) is a unit of mass used in the imperial, United States customary and other systems of measurement. A number of different definitions have been used, the most common today being the international avoirdupois pound which is legally defined as exactly 0.45359237 kilograms.

### Metric pound

Metric pound is a unit of weight. It is equal to 0.5 kilogram.

### Troy pound

Troy pound is a second traditional unit of mass or weight. It is equal to 373.2417216 grams.

### Ounce

Ounce (abbreviated: oz) is a unit of mass with several definitions, the most commonly used of which are equal to approximately 28 grams.

### Troy ounce

Troy ounce is a second traditional unit of mass or weight used in pharmacy and jewelry. It is equal to 0.0311034768 kilogram.

### Gram

Gram (also gramme in some British English texts), symbol g, is a unit of mass.

### Centigram

Centigram is a metric unit of mass. It is equal to 10 milligrams or about 0.154 grain.

### Decigram

Decigram is a metric unit of mass. It is equal to 100 milligrams or about 1.5432 grains.

### Dekagram

Dekagram is a common metric unit of mass. It is frequently used in European food recipes. It is equal to 10 grams, 0.01 kilogram or 0.352 739 66 ounce.

### Hectogram

Hectogram is a metric unit of mass. It is equal to 0.1 kilogram.

### Nanogram

Nanogram is a metric unit of mass. It is equal to 0.000000000001 gram, or one millionth of a milligram.

### Microgram

Microgram (µg , mcg or sometimes ug) is a unit of mass equal to one millionth (1/1,000,000) of a gram (1 × 10−6), or 1/1000 of a milligram.

### Megagram

Megagram is an SI unit of mass. It is equal to one million grams or 1000 kilograms. It is the same as tonne (metric ton).

### Milligram

Milligram is a very common metric unit of mass. It is equal to 0.001 gram or 1000 micrograms.

### Stone

Stone (abbreviation st) is a unit of measure which, at the time it ceased to be legal for trade in United Kingdom in 1985, was defined in British legislation as being a weight or mass equal to 14 avoirdupois pounds (about 6.35 kilograms). It was also formerly used in several Commonwealth countries.

### Ton

Ton is a unit of measure. It has a long history and has acquired a number of meanings and uses over the years. It is used principally as a unit of weight, and as a unit of volume. It can also be used as a measure of energy, for truck classification, or as a colloquial term.

### Metric ton

Ton or tonne or metric ton is a unit of weight or mass. It is equal to 1000 kilograms or 2204.62262 pounds.

### UK long ton

UK long ton is a unit of weight or mass. It is equal to 1016.0469088 kilograms.

### US short ton

US short ton is a unit of weight or mass. It is equal to 907.18474 kilograms.

### Pennyweight

Pennyweight (abbreviated dwt) is a unit of mass that is equal to 24 grains, 1/240 of a troy pound, 1/20 of a troy ounce, approximately 0.054857 avoirdupois ounce and approximately 1.555 grams.

### Kip

Kip is a non-SI unit of force that equals 1,000 pounds-force, used primarily by architects and engineers to measure engineering loads. Although uncommon, it is occasionally also considered a unit of mass, equal to 1,000 pounds, i.e. one half of a U.S. ton. One use is as a unit of deadweight to compute shipping charges.

### Carat

Carat is a unit of mass equal to 200 mg (0.007055 oz), and it is used for measuring gemstones and pearls.

### Hundredweight

Hundredweight or centum weight (abbreviated cwt) is a unit of mass defined in terms of the pound (lb). Its British definition is not the same as that used in North America. The two are distinguished by speaking of the long hundredweight and the short hundredweight.

### US short hundredweight

US short hundredweight is equal to 45.359237 kilograms.

### UK long hundredweight

UK long hundredweight is equal to 50.80234544 kilograms.