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Generator Sizing Calculator

Quick answer

This calculator computes proper generator size for your needs.

  • A free tool that saves time and avoids manual errors.
  • Free, no sign-up, works on any device.

Figures are estimates from this calculator’s standard formula — adjust the inputs in the tool below for your exact number.

How Does the Generator Sizing Calculator Work?

The Generator Sizing Calculator allows you to perform calculations quickly and easily. Simply enter the required values and click the calculate button to get instant results.

  1. 1

    Enter Values

    Enter the required values in the fields below.

  2. 2

    Adjust Settings

    Enter the required electrical values.

  3. 3

    View Results

    Click the "Calculate" button to see the result instantly.