Electrical Power
Power calculations, watts, and energy relationships.
Calculators
Electrical Power Calculator
Enter any two of power, voltage, and current to calculate the third (P = V × I).
Real Power Calculator
Calculate real (true) power from voltage, current, and power factor (P = V × I × PF).
Apparent Power Calculator
Calculate apparent power from voltage and current (S = V × I).
Reactive Power Calculator
Calculate reactive power from voltage, current, and power factor (Q = V × I × sin(cos⁻¹(PF))).
Guides & Examples
Formula
Power Triangle Formula
The power triangle formula relating real, reactive, and apparent power, and how power factor connects them.
Example
Electrical Power Examples
Worked, step-by-step examples calculating real, apparent, and reactive power, and power factor.
Guide
Real, Reactive & Apparent Power Explained
Real, reactive, and apparent power explained, and how the power triangle and power factor connect them.