Molecular Weight Calculator


How to calulate the molecular weight from a formula?

To help you calculating the molecular weight for a given molecular formula, has designed this online tool. All you need to do is to enter a molecular formula, and click the "Go" button below.

The molecular weight will be presented in the result area below:

Molecular Formula:



Output by on Your Molecular Formula:

Specified Molecular Formula: Valid

Molecular Formula: C8H10N4O2
   Molecular Weight:
     194.19 u (atom mass unit)

What is molecular weight?

Molecular weight is the sum of the atomic mass of the atoms in a given molecule. The most accurate atomic mass available on the Internet is used in this calculator.

Many periodic tables do include estimated atomic mass for each atom, as shown below:

Periodic Table with Atomic Mass
Periodic Table with Atomic Mass (


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2021-07-25, 235👍, 0💬