Does it handle line-to-neutral measurements?
Yes. Use the voltage and current measured at the same point. For three-phase, enter line-to-line voltage and line current.
Step-by-step walkthrough
Electrical Power (P = VI) Guide
Use this companion guide beside the interactive calculator to make sure you understand the “why” behind every click. Each section includes the classroom explanation, student-friendly language, and quick practice prompts.
Before you start
Collect the data points listed below and double-check their units. Keeping an organized “givens” list is one of the fastest ways to reduce math errors and impress exam graders.
- kW
- kVA
- three phase
Detailed procedure
Step 1
Select single-phase or three-phase.
Step 2
Enter voltage, current, and power factor.
Step 3
Review kW, kVA, kVAR, and the resulting power factor to size conductors or transformers appropriately.
Teaching & troubleshooting tips
Can PF exceed 1?
No. Power factor is limited to ±1. The slider clamps inputs between 0 and 1 to keep calculations within physical bounds.