This real and reactive power calculator relates real power (P), reactive power (Q), and apparent power (S) through the power triangle. Enter any two values above to solve the third and the power factor.
Formulas
S = √(P² + Q²) Power factor = P ÷ S
Example
P = 800 W, Q = 600 VAR: S = √(800² + 600²) = 1000 VA, PF = 0.8.
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Frequently Asked Questions
How do I calculate apparent power?
Take the square root of real power squared plus reactive power squared: S = sqrt(P squared + Q squared).
What is the power triangle?
A right triangle with real power on the base, reactive power on the side, and apparent power as the hypotenuse.
How does power factor relate to it?
Power factor is real power divided by apparent power, the cosine of the triangle’s angle.