AC Power Calculator
Calculate AC real power for single-phase or three-phase loads.
Interactive Electrical Calculator
AC Power Calculator
Calculate AC real power for single-phase or three-phase loads.
Result
Enter values and calculate.
How to use this AC Power Calculator
Enter the known electrical values above and select the applicable system options. The result updates when you press Calculate. Keep units consistent with the labels shown.
Formula
P = V × I × PF; three phase uses √3 × V × I × PF.
Frequently asked questions
What does this calculator do?
Calculate AC real power for single-phase or three-phase loads.
Can I use the result for final electrical design?
Use the result as a planning or educational estimate. Final wiring, protection, fault-current and equipment selections should be verified against manufacturer data and the electrical code that applies to your installation.
Why can real-world results differ?
Actual systems can be affected by temperature, cable construction, harmonics, equipment efficiency, battery chemistry, starting current, installation method and local code requirements.