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AC Power and Wattage Calculator — result sheet
Estimate real AC power from voltage, current, power factor, and single- or three-phase selection.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Single phase P = VI·PF; balanced three-phase P = √3VI·PF.
The estimate separates apparent electrical quantities from real power by applying the entered power factor and phase model.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Line voltage — V; minimum 1.0E-6; maximum 1000000
- Line current — A; minimum 0; maximum 1000000
- Power factor — minimum 0; maximum 1
- Phase count — 2 choices
Worked example
| Input | Value |
|---|---|
| Line voltage | 230 |
| Line current | 5 |
| Power factor | 0.8 |
| Phase count | single |
Real power = 920 W.
Assumptions and limits
- Voltage and current are RMS values and the power factor is from 0 to 1.
- The three-phase option assumes a balanced system and line-to-line voltage.
- Harmonics, demand variation, wiring losses, tariffs, and electrical-code compliance are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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