# Voltage Regulation Calculator (with Examples)

Transformer voltage regulation refers to its ability to maintain a constant output regardless of variations in the input voltage or load conditions. It determines how well a transformer can regulate the voltage at its secondary terminals.

This tool calculates both the Step up and Step down voltage regulation

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## Formula

Step Down Voltage Regulation represents the change in terminal voltage when a load current at any power factor is applied, expressed as a fraction of the no-load terminal voltage.

Step up voltage regulation represents the ratio of the change in the terminal voltage when a load at a given power factor is removed, and the load voltage.

## Example Calculation

Consider a transformer with a no-load voltage of 120 volts and a full-load voltage of 110 volts.

Using the calculator VRSD = 8.33% and VRSU = 9.09%

## Background

Transformer voltage regulation is the measure of the change in voltage from no-load to full-load conditions, expressed as a ratio or percentage of the