Step-by-step instructions
- Enter or select Apparent power (VA).
- Enter or select Real power (W).
- Tap Calculate.
- Review the result shown directly below the calculator.
Reactive Power From Apparent and Real Power Calculator
Calculate reactive power Q = √(S²−P²).
How to use the Reactive Power From Apparent and Real Power Calculator
Calculate reactive power Q = √(S²−P²).
What the inputs mean
- Apparent power (VA)
- Enter the value requested by this field label.
- Real power (W)
- Enter the value requested by this field label.
Formula or calculation method
The calculator applies the standard mathematical relationship for the labeled inputs and returns the computed result automatically.
Example
Try entering realistic values for Apparent power (VA) and Real power (W), then tap Calculate to see how the result changes.
How to understand the result
Use the result as an estimate based on the values you entered. For planning decisions, double-check that the input units and assumptions match your real situation.
Tip: Keep all values in compatible units and use values from the same time period when the calculator compares two amounts.