Convert Atomic Mass Unit to Gram (amu to gm)

In next fields, kindly type your value in the text box under title [ From: ] to convert from atomic mass unit to gram (amu to gm). As you type your value, the answer will be automatically calculated and displayed in the text box under title [ To: ].


Atomic Mass Unit (abbreviations: amu, or u): also known as dalton (symbol: Da), is a standard unit of mass that used on an atomic or molecular scale (atomic mass). One unified atomic mass unit is about the mass of one nucleon (either a single proton or neutron) and equivalent to 1 g/mol.

Gram (abbreviation: gm): is a SI (metric) system unit of mass. Where, at the temperature of melting ice, it is the absolute weight of a volume equal to the hundredth part of a metre cube of pure water.

How to Convert Atomic Mass Units to Grams

Example: How many grams are equivalent to 40.29 atomic mass units?


1 atomic mass units = 1.66E-24 grams

40.29 atomic mass units = Y grams

Assuming Y is the answer, and by criss-cross principle;

Y equals 40.29 times 1.66E-24 over 1

(i.e.) Y = 40.29 * 1.66E-24 / 1 = 6.68814E-23 grams

Answer is: 6.68814E-23 grams are equivalent to 40.29 atomic mass units.

Practice Question: Convert the following units into gm:

N.B.: After working out the answer to each of the next questions, click adjacent button to see the correct answer.

( i ) 1.8 amu

( ii ) 3.91 amu

( iii ) 1.61 amu

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