Weight converter tool provides easy weight conversion of one type of measuring units of weight to another type of units. Metric weight units are based on the weight of respective metric volumes of water. For example, a litre of water weighs one kilogram.

## What is Grain units ?

Grain is one of the earliest units of common measure and the smallest one of troy systems. A unit of Grain weight is equal to 0.065 gram, or 1/7,000 pound.

## What is the unit U ?

The atomic mass unit is a unit of measurement of weight.An atomic mass unit (u) is a unit of mass used to express atomic and molecular weights. One atomic mass unit (1u) is defined as one twelfth (1/12) of the mass of an atom of carbon-12.

## Conversion of specific gravity (SG)

Specific gravity (SG ) is the ratio of the density of a substance and the density of water taken at 4 degree celsius. In other words:

The density of Substance ÷ Density of Water at 4 ℃

• In CGS (centimetre-gram-inch) units, the density of the substance is equal to the specific gravity.
• For MKS (meters, kilograms, seconds) multiply by 103, because the density of water in that system is 1,000 kg/m3.
• Multiply by 1.94 slug/ft3, if it is the imperial system.

## Ounce as a unit of Weight

Ounce, unit of weight in the avoirdupois system, equal to 1/16 pound (437 1/2 grains), and in the troy and apothecaries’ systems, equal to 480 grains, or 1/12 pound.

## Stone as a Unit of Weight

The stone is a unit of mass equal to 6.35 Kgs in Imperial units or 14 pounds in the English system. The stone continues in customary use in the United Kingdom and Ireland for body weight. In Asia, however, the stone unit is used as picul or tam a as a unit of weight .

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