# How many grams are in 1 amu

## Convert weights

### Operating assistance

Enter the weight to be converted and select from and to which weight unit this value is to be converted. The converter for weights provides the common metric and the most common Anglo-American weights for the calculation. Further information on the various weight units can be found behind the help buttons on the calculator with question marks.

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Convert Kilograms (kg) to Pounds (lb)

### Metric units of weight

The metric system is the system of units with the kilogram as the base unit for weight or mass. In contrast to other systems of units, it is easy to calculate with decimal multiples or decimal fractions. Among other things, the following weight units belong to it:

### Ton (t)

The unit ton belongs to the metric system and is derived from the basic unit kilogram. 1 ton can be converted to 1,000 kilograms or 1 kilogram is equivalent to 0.001 tons. The bin belongs to the international system of units (SI).

### Kilogram (kg)

The kilogram is the basic unit of mass, i.e. weight in the international system of units (SI) and in other metric systems. It has been determined since 1889 by the mass of the international prototype or original kilogram. This is a platinum-iridium cylinder that is kept in a safe by the International Bureau of Weights and Measures in Paris. All other mass or weight units in the metric system are derived from the kilogram (e.g. 1 t = 1,000 kg, 1 kg = 1,000 g).

### Hectogram (hg)

The unit hectogram belongs to the metric system and is derived from the basic unit kilogram. 1 kilogram corresponds to 10 hectograms and 1 hectogram corresponds to 0.1 kilograms. Corresponding to the conversion into kilograms, the hectogram is defined in national systems of units and standards.

### Gram (g)

The unit of gram also belongs to the metric system and is derived from the basic unit of the kilogram. 1 kilogram corresponds to 1,000 grams and 1 gram corresponds to 0.001 kilograms. Corresponding to the conversion into kilograms, the gram is defined in national systems of units and standards.

### Centigram (cg)

The unit centigram also belongs to the metric system and is derived from the basic unit kilogram. 1 kilogram corresponds to 100,000 centigrams and 1 centigram corresponds to 0.00001 kilograms. Corresponding to the conversion into kilograms, the centigram is also defined in national systems of units and standards.

### Milligrams (mg)

The unit milligram, in turn, belongs to the metric system and is derived from the basic unit kilogram. 1 kilogram corresponds to a million milligrams or one milligram corresponds to a millionth of a kilogram. Corresponding to the conversion into kilograms, the milligram is defined in national systems of units and standards.

### Micrograms (μg)

The microgram unit is also part of the metric system and is derived from the kilogram as the base unit. One kilogram corresponds to a billion micrograms or one microgram corresponds to a billionth of a kilogram. Corresponding to the conversion into kilograms, the microgram is defined in national systems of units and standards.

### Nanogram (ng)

After all, the unit nanogram also belongs to the metric system and is derived from the basic unit kilogram. One kilogram corresponds to a trillion nanograms or one nanogram corresponds to a trillionth of a kilogram. Corresponding to the conversion into kilograms, the nanogram is defined in national systems of units and standards.

### Carat (kt)

The unit carat is mostly used for weighing precious stones. The carat belongs to the metric system and is derived from the basic unit kilogram. 1 carat corresponds to 0.2 grams or 1 carat is 0.0002 kilograms. According to the conversion into kilograms, the carat is defined in national systems of units and standards. It is a legal unit in the states of the EU, but does not belong to the international system of units (SI).

### Atomic mass unit (u)

The atomic mass unit is used when specifying atomic and molecular masses. The value is fixed at 1/12 of the mass of an atom of the carbon isotope 12C. So 1u roughly corresponds to the mass of a proton or neutron. The unit symbol "u" ​​stands for unified atomic mass unit. The atomic unit of mass belongs to the international system of units and is derived from the base unit of the kilogram. 1 u corresponds to 1.660538921x10-27 Kilogram.

### Other metric weight units

There are numerous other SI weight units that ultimately represent a multiple or a fraction of the gram. For this purpose, so-called unit prefixes, i.e. prefixes for the gram, are formed, as in the previous examples. The following table gives an overview:

symbolSurnamevalue
ZgZettagram1021Trillion grams
EgExagram1018Trillion grams
PgPetagram1015Billiard grams
DayTeragram1012Trillion grams
GgGigagram109Billion grams
MgMegagram106Million grams
kgkilogram103A thousand grams
edHectogram102One hundred gram
dagDecagram101Ten grams
GGram100One gram
dgdecigram10-1Tenth of a gram
cgcentigram10-2Hundredths of a gram
mgmilligram10-3Thousandths of a gram
µgMicrograms10-6Millionths of a gram
ngNanograms10-9Billionths of a gram
pgPicogram10-12Trillionth of a gram
fgFemtogram10-15Billiardth of a gram
agAttogram10-18Trillionth of a gram
zgZeptogram10-21Trilliardth of a gram

### Anglo-American weight units

The Anglo-American weight units originally come from medieval England. Many of them were quantities that can be measured on everyday objects, such as Grain, Stone, or Dram. In the course of time they were largely standardized, and eventually the metric system was used as the standard for most Anglo-American weight units. However, they do not belong to the international system of units, so they are not SI-compliant.

### Long ton (tn.l.)

The long ton is also outdated as the "British bin". It corresponds to 20 "long hundredweight" or 2,240 pounds (pounds). As with the short ton, one long ton is equivalent to 20 hundred weights. However, the unit hundredweight differs in the British and American systems. While in America a hundredweight is defined as 100 pounds, for the conversion in the Anglo-Saxon world, a hundredweight is equivalent to 112 pounds. The following applies: One long ton corresponds to 20 long hundredweight, which in turn corresponds to 2,240 pounds and thus 1,016.0469088 kilograms. The Long ton is used in particular for the standard displacement of a ship, which was established in Washington in 1922. Incidentally, the well-known unit "ton" from the metric system, which is defined by 1,000 kilograms, is consequently called the metric ton in the Anglo-American region to distinguish between long and short ton.

### Short ton (tn.sh.)

The short ton is also called the "American bin" out of date and is particularly common in the USA. It is equivalent to 20 "Short Hundredweight" or 2,000 pounds (pounds). As with the long ton, a short ton is equivalent to 20 hundred weights. However, the unit hundredweight differs in the British and American systems. While in America a hundredweight is defined as 100 pounds, for the conversion in the Anglo-Saxon world, a hundredweight is equivalent to 112 pounds. The following applies: One short ton corresponds to 20 short hundredweight, which in turn corresponds to 2,000 pounds and thus 907.18474 kilograms. Incidentally, the well-known unit "ton" from the metric system, which is defined by 1,000 kilograms, is consequently called the metric ton in the Anglo-American region to distinguish between long and short ton.

### Long hundredweight (cwt.l.)

The long hundredweight is also known as the "British hundredweight", it is widespread there and corresponds to 112 pounds or 50.80234544 kilograms. The term "Hundredweight" corresponds roughly to the German term "Zentner".

### Short hundredweight (cwt.sh.)

The short hundredweight is also known as the "American hundredweight", it is common there and corresponds to 100 pounds or 45.359237 kilograms. The term "Hundredweight" corresponds roughly to the German term "Zentner".

### Stone (st)

The unit of weight Stone is a British non-SI-compliant unit that was an official unit in Great Britain until 1985. One stone is equivalent to 14 pounds or 6.35029318 kilograms. As an unofficial unit in Great Britain for the human body weight, Stone is as important as the obsolete and abolished units kilocalorie or PS in Germany.

### Pound / pound (lb)

The pound or pound does not belong to the international system of units SI (Système international d'unités). Many different definitions have been used, but today the international Avoirdupois Pound is the most common unit and is officially defined as exactly 0.45359237 kilograms. So 1 pound is equivalent to 0.45359237 kilograms or one kilogram is equivalent to 2.20462262 pounds. The Avoirdupois Pound described here corresponds to 16 ounces and should not be confused with the Troy Pound, which is only rarely used for precious metals and is derived from the troy ounce.

### Ounce / ounce (oz.)

The common ounce (English: International Avoirdupois Ounce) as a unit of weight is very common in the Anglo-American region, but does not belong to the international system of units. It should not be confused with the troy ounce or pharmacist's ounce and is often used in many countries to indicate the weight of food. 1 ounce is equivalent to 28.349523125 grams, or one gram is equivalent to 0.035273961 ounces.

### Troy ounce (oz.tr.)

The troy ounce as a unit of weight does not belong to the international system of units, but is used for precious metals. Their weight corresponds to the pharmacist's ounce, but only relates to the precious metal content. 1 troy ounce corresponds to 31.1034768 grams or one gram corresponds to 0.0321507466 troy ounces.

### Apothecary Ounce (oz.ap.)

The apothecary ounce as a unit of weight does not belong to the international system of units, but is used for drugs and chemicals. Their weight corresponds to the troy ounce. 1 pharmacist ounce corresponds to 31.1034768 grams or one gram corresponds to 0.0321507466 pharmacist ounces.

### Dram (dr)

The dram is a non-SI-compliant unit of weight or mass. It is defined as one 256th of a pound or sixteenth part of an ounce.
1 dr. = 16 oz. = 1.7718 g
256 dr. = 16 oz. = 1 lb.

### Grain (gr)

The grain is the smallest classical English mass unit. The usual pound contains 7,000 grains.
1 grain = 64.79891 mg
1 gram = 15.43236 grain
The unit is increasingly being replaced by milligrams or carats. However, grain is still used in handgun projectiles, arrowheads and ammunition powder.

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### References

In particular, we used the information from the following sources for the topic "Weight units":

### Last update on April 14th, 2021

The pages of the "Weight Units" theme world were last editorially checked on April 14th, 2021 by Stefan Banse. They are all up to date.

### Previous changes on 07/26/2020

• 07/26/2020: Extension of the topic converting weights to include numerous information texts for converting various weight units.
• Editorial revision of all texts in this subject area