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Atomic Mass Calculator
Atomic mass is the mass of a single atom of any element or compound and is expressed in atomic mass units (or amu). Atomic Mass Calculator calculates the atomic mass of the given element or compound entered in the given space.
Below is given a default chemical formula, click "Calculate Atomic Mass" to find the Atomic Mass of the given element.


Steps for Atomic Mass Calculator

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Step 1 :  

Read the given compound and note down the elements present in it. By using periodic table, find the mass number for each element.

Step 2 :  

Atomic mass is given by the formula:
Atomic mass = Mass number $\times$ No of atoms of the Particular element present in the given compound.

Apply the formula for all the elements present in the given compound and add them, we get the atomic mass.

Problems on Atomic Mass Calculator

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  1. Find the Atomic mass of Benzene?

    Step 1 :  

    Given Compound is Benzene. Its chemical formula is C6H6 which means it has 6 atoms of Carbon and 6 atoms of hydrogen.

    Step 2 :  

    From periodic table

    Mass number of Carbon C = 12.0107 amu

    Mass number of Hydrogen H = 1.00794 amu.

    Atomic mass = 6 $\times$ 12.0107 amu + 6 $\times$ 1.00794 amu

                         = 78.11184 amu.

    Answer  :  

    The Atomic mass of Benzene is 78.11184 amu.

  2. Find the atomic mass of Water?

    Step 1 :  

    Given Compound is Water. We know that its chemical formula is H2O which means it has 2 atoms of Hydrogen and 1 atom of Oxygen.

    Step 2 :  

    From periodic table

    Mass number of Hydrogen H = 1.00794 amu

    Mass number of Oxygen O = 16 amu

    Atomic mass = 2 $\times$ 1.00794 amu + 1 $\times$ 15.9994 amu.

                         = 18.01588 amu.

    Answer  :  

    The atomic mass of water is 18.01588 amu.

More Atomic Mass Calculator
Grams to Atoms Calculator Metal Weight Calculator
Equivalent Weight Calculator Molecular Weight Calculator
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