Atom Calculator (Neutrons)

Quickly calculate the number of neutrons in an atom by subtracting its atomic number (protons) from its atomic mass number.

Total protons + neutrons
Atomic Number

How to Use

  1. 1

    Step 1

    Enter the Atomic Mass Number (A) of the isotope.

  2. 2

    Step 2

    Enter the Number of Protons (Z), which is also the Atomic Number.

  3. 3

    Step 3

    Click Calculate Neutrons to instantly find the number of neutrons (N).

Frequently Asked Questions

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