
Grams to Attograms
Converter 
Convert Attograms to Grams (ag to g)
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Conversion Table
grams
to attograms 
g  ag 
1 g  1.0E+18 ag 
2 g  2.0E+18 ag 
3 g  3.0E+18 ag 
4 g  4.0E+18 ag 
5 g  5.0E+18 ag 
6 g  6.0E+18 ag 
7 g  7.0E+18 ag 
8 g  8.0E+18 ag 
9 g  9.0E+18 ag 
10 g  1.0E+19 ag 
11 g  1.1E+19 ag 
12 g  1.2E+19 ag 
13 g  1.3E+19 ag 
14 g  1.4E+19 ag 
15 g  1.5E+19 ag 
16 g  1.6E+19 ag 
17 g  1.7E+19 ag 
18 g  1.8E+19 ag 
19 g  1.9E+19 ag 
20 g  2.0E+19 ag 
How to convert 1 gram (g) = 1E+18 attogram (ag).
Gram (g) is a unit of Weight used in Metric system.
Attogram (ag) is a unit of Weight used in Metric system. Grams: A Unit of Weight
Grams are a unit of weight that are used in the International System of Units (SI), also known as the metric system. Grams are derived from the French word gramme, which was taken from the Late Latin term gramma, meaning a small weight. The symbol for gram is g.
Definition of the Gram
The gram is defined as one onethousandth of a kilogram, which is the base unit of mass in the SI. The kilogram is defined by taking the fixed numerical value of the Planck constant h to be 6.62607015 ×10 −34 when expressed in the unit J s, which is equal to kg m 2 s −1, where the meter and the second are defined in terms of c and ∆ν Cs. The Planck constant is a fundamental physical constant that relates the energy of a photon to its frequency.
The gram is a very small unit of weight, equivalent to about 0.035 ounces or 0.002 pounds. It is commonly used for measuring nonliquid ingredients in cooking, such as flour, sugar, salt and spices. It is also used for measuring small masses, such as jewelry, coins, medicines and chemicals.
How to Convert Grams
Grams can be converted to other units of weight by using conversion factors or formulas. Here are some examples of how to convert grams to other units of weight in the US customary system and the SI system:
 To convert grams to ounces, divide by 28.349523125. For example, 100 g = 100 / 28.349523125 = 3.527 oz.
 To convert grams to pounds, divide by 453.59237. For example, 500 g = 500 / 453.59237 = 1.102 lb.
 To convert grams to tons (short), divide by 907184.74. For example, 1000 g = 1000 / 907184.74 = 0.0011 ton.
 To convert grams to kilograms, divide by 1000. For example, 200 g = 200 / 1000 = 0.2 kg.
 To convert grams to milligrams, multiply by 1000. For example, 50 g = 50 x 1000 = 50000 mg.
 To convert grams to micrograms, multiply by 1000000. For example, 10 g = 10 x 1000000 = 10000000 µg.
Where Grams are Used
Grams are used in different countries and regions for different applications and purposes. Here are some examples of where grams are used:
 In most countries that use the SI system, grams are used for measuring food portions and ingredients, postal items, drugs and medicines, precious metals and gems and scientific experiments.
 In the United States, grams are sometimes used for measuring food portions and ingredients, especially for nutritional information labels, drugs and medicines, precious metals and gems and scientific experiments.
 In Canada, grams are used for measuring food portions and ingredients, postal items, drugs and medicines, precious metals and gems and scientific experiments.
 In Australia and New Zealand, grams are used for measuring food portions and ingredients, postal items, drugs and medicines, precious metals and gems and scientific experiments.
 In China, grams are used for measuring food portions and ingredients, postal items, drugs and medicines, precious metals and gems and scientific experiments.
History of Grams
Grams have a long history that dates back to ancient times. Here are some highlights of the history of grams:
 The gram was originally defined in 1795 as the absolute weight of a volume of pure water equal to the cube of the hundredth part of a meter at the temperature of melting ice.
 The gram was later changed to be the weight of a volume of pure water equal to the cube of the hundredth part of a meter at the temperature of maximum density of water (4 °C).
 The gram was part of the centimeter–gram–second system of units (CGS) that was developed in the 19th century as an alternative to the meter–kilogram–second system of units (MKS).
 The gram was replaced by the kilogram as the base unit of mass in the SI system that was adopted in 1960 as an international standard for measurements.
 The gram was redefined in terms of the kilogram and the Planck constant in 2019 as part of a major revision of the SI system.
Example Conversions of Grams to Other Units
Here are some examples of conversions of grams to other units of weight:
 1 g = 0.035274 oz
 1 g = 0.002205 lb
 1 g = 0.0000011 ton
 1 g = 0.001 kg
 1 g = 1000 mg
 1 g = 1000000 µg
 1 g = 0.032151 troy oz
 1 g = 0.032151 apothecaries’ oz
 1 g = 0.035274 Spanish oz
 1 g = 0.033814 French oz
Grams also can be marked as grammes (alternative British English spelling in UK). Attograms: A Unit of Weight
Attograms are a unit of weight that are used for measuring extremely small masses, such as atoms, molecules, and particles. Attograms are also known as trillionths of a gram. The symbol for attogram is ag.
Definition of the Attogram
The attogram is defined as one trillionth of a gram, which is the base unit of mass in the International System of Units (SI). The attogram is also equal to one thousandth of a femtogram or one millionth of a picogram.
The attogram is equal to about 2.2×1021 pounds or 1.54×1017 grains. The attogram is also equal to about 6.02×1023 atomic mass units or 1.66×1033 kilograms.
How to Convert Attograms
Attograms can be converted to other units of weight by using conversion factors or formulas. Here are some examples of how to convert attograms to other units of weight in the US customary system and the SI system:
 To convert attograms to pounds, multiply by 2.2×1021. For example, 10 ag = 10 x 2.2×1021 = 2.2×1020 lb.
 To convert attograms to grains, multiply by 1.54×1017. For example, 5 ag = 5 x 1.54×1017 = 7.7×1017 gr.
 To convert attograms to tonnes, multiply by 1×1021. For example, 20 ag = 20 x 1×1021 = 2×1020 t.
 To convert attograms to kilograms, multiply by 1×1018. For example, 15 ag = 15 x 1×1018 = 1.5×1017 kg.
 To convert attograms to grams, multiply by 1×1015. For example, 25 ag = 25 x 1×1015 = 2.5×1014 g.
 To convert attograms to milligrams, multiply by 0.000000000001. For example, 30 ag = 30 x 0.000000000001 = 0.00000003 mg.
Where Attograms are Used
Attograms are used in different countries and regions for different applications and purposes. Here are some examples of where attograms are used:
 In the fields of physics, chemistry, and microbiology, attograms are used for measuring weight, especially for atoms, molecules, and particles.
 In the fields of medicine and pharmacology, attograms are used for measuring weight, especially for drugs, hormones, and biomarkers.
 In the fields of biotechnology and nanotechnology, attograms are used for measuring weight, especially for nanostructures, nanomaterials, and nanodevices.
 In the fields of environmental science and toxicology, attograms are used for measuring weight, especially for pollutants, contaminants, and toxins.
History of Attograms
Attograms have a relatively recent history that dates back to the late 20th century. Here are some highlights of the history of attograms:
 The attogram was derived from the gram, which was originally defined as the mass of one cubic centimeter of water at its maximum density of four degrees Celsius in the late 18th century.
 The attogram was part of the metric system that was introduced in France in the late 18th century as a decimalbased system of measurement that was designed to replace the traditional units that varied from region to region.
 The attogram was adopted by many countries around the world as part of the International System of Units (SI) that was established in the mid 20th century as a universal system of measurement that was based on seven base units and several derived units.
 The attogram was also referred to as the trillionth of a gram or the millinano gram in some countries and contexts to emphasize its extremely small size.
Example Conversions of Attograms to Other Units
Here are some examples of conversions of attograms to other units of weight:
 1 ag = 2.2×1021 lb
 1 ag = 1.54×1017 gr
 1 ag = 1×1021 t
 1 ag = 1×1018 kg
 1 ag = 1×1015 g
 1 ag = 0.000000000001 mg
 1 ag = 6.02×1023 u
 1 ag = 1.66×1033 kN
 1 ag = 3.53×1023 oz
Attograms also can be marked as Attogrammes (alternative British English spelling in UK).
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