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Electrical Power Calculator — result sheet
Estimate real power, apparent power, energy, and resistance from voltage, current, power factor, and operating time.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Apparent power S = V × I; real power P = V × I × power factor; energy = P × hours.
The page separates apparent power from real power so an AC scenario can include a supplied power factor. It is a transparent calculation aid, not a substitute for electrical design or code review.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Voltage — volts; minimum 1.0E-6; maximum 1000000000
- Current — amps; minimum 1.0E-6; maximum 1000000000
- Power factor — %; Use 100% for a direct-current load or a unity-power-factor scenario.; minimum 0; maximum 100
- Operating time — hours; minimum 0; maximum 1000000000
Worked example
| Input | Value |
|---|---|
| Voltage | 230 |
| Current | 5 |
| Power factor | 100 |
| Operating time | 8 |
Real and apparent power are 1,150 W/VA, energy is 9,200 Wh, and the V/I resistance ratio is 46 ohms.
Assumptions and limits
- Voltage and current are compatible RMS values when modeling AC power.
- Power factor is entered as a percentage from 0% through 100%.
- Operating time is measured in hours and energy is reported in watt-hours.
- The result does not size wires, breakers, batteries, generators, or protective equipment.
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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