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Electrical

Single-Phase AC Real Power Calculator

Find active power from RMS voltage, RMS current and power factor.

Ideal component relationshipsUnits and assumptions explained below

Circuit parameters

Runs on your device

CIRCUIT RESULT

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter voltage, current, power factor.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Real power = RMS voltage × RMS current × power factor.

A WORKED EXAMPLE

Using voltage = 12 V, current = 2 A, power factor = 0.8, the result is 19.2 W. Change these example inputs to match your task; use the method above to check each step.

What to keep in mind

Ideal-component calculation for study and estimation. It does not select safe wiring, protective devices or component ratings for an installation.

Common questions

Which inputs does this calculation need?

Find active power from RMS voltage, RMS current and power factor. Enter voltage in V, current in A, power factor. The filled example is editable and is not a saved personal record.

How should I interpret the result?

Ideal-component calculation for study and estimation. It does not select safe wiring, protective devices or component ratings for an installation.

Methodology maintained by ClarityKit. How these tools are built and checked.