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Effective Charge Calculator

Result

Calculated result 8 Based on the values entered.
↗ Chemistry

Effective Charge Calculator Calculate the effective nuclear charge (Z*) experienced by an electron using Slater's rules. — free online calculator.

Formula

Z-sigma
  • Effective Charge Calculator calculates its result from Atomic number, Shielding constant. It uses the formula Z-sigma. Change any input to recalculate the result instantly.
  • The main inputs are Atomic number, Shielding constant. Enter them in the units and format shown in the calculator.
  • Use the units, labels and assumptions shown beside each input so the formula is applied consistently.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: Effective Charge

Inputs
  • Atomic number: 10
  • Shielding constant: 2

Using Atomic number = 10, Shielding constant = 2, the calculated result is 8.

Sample result: Calculating…

Frequently asked questions

What does the Effective Charge calculate?

Effective Charge Calculator Calculate the effective nuclear charge (Z*) experienced by an electron using Slater's rules. — free online calculator.

Which values should I enter?

Enter Atomic number, Shielding constant using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: Z-sigma.

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026