Electrical and Engineering
Three Phase Power Calculator
Three Phase Power Calculator calculate apparent, real, and reactive three-phase power from line voltage, line current, and power factor.
Electrical and Engineering
Three Phase Power Calculator
Calculate apparent, real, and reactive three-phase power from line voltage, line current, and power factor.
Formula
S=sqrt(3)VI; P=S x PF; Q=sqrt(S^2-P^2).
About the Three Phase Power Calculator
Calculate apparent, real, and reactive three-phase power from line voltage, line current, and power factor. This tool keeps the requested measurements separate and applies the named method instead of substituting an unrelated general estimate.
How the Three Phase Power Calculator Works
Balanced three-phase line values produce total kVA; power factor separates real and reactive components.
Formula
S=sqrt(3)VI; P=S x PF; Q=sqrt(S^2-P^2).
The calculation runs in your browser. Values are validated for required ranges, compatible units, and method-specific restrictions before results are displayed.
Required Inputs
- Line-to-line voltage (required) - enter in V.
- Line current (required) - enter in A.
- Power factor (required).
Results Reported
The result panel reports the final answer and the intermediate quantities needed to check the calculation:
- Apparent power (kVA)
- Real power (kW)
- Reactive power (kVAR)
- Power-factor angle (deg)
Three Phase Power Calculator Example
Select Example Data in the calculator to load this reproducible input set:
| Input | Example value |
|---|---|
| Line-to-line voltage | 400 V |
| Line current | 50 A |
| Power factor | 0.85 |
How to Use the Calculator
- Confirm that the calculator title and formula match the quantity you need.
- Enter every required value using the unit shown with its field.
- Select Example Data to inspect a valid input set, or enter your own values and select Calculate.
- Review all reported values and the displayed formula before using the answer.
- Use Copy Result or Download CSV when you need a reusable record.
Accuracy and Limitations
Unbalanced systems, harmonics, phase-to-neutral values, motor efficiency, and code sizing require a full electrical study.
Keep units consistent, use measurements that represent the actual situation, retain full precision during the calculation, and round only the final answer. Professional decisions may require current official rules, field measurements, laboratory methods, or specialist review.
Frequently Asked Questions
What does the Three Phase Power Calculator calculate?
Calculate apparent, real, and reactive three-phase power from line voltage, line current, and power factor.
Which formula does the Three Phase Power Calculator use?
S=sqrt(3)VI; P=S x PF; Q=sqrt(S^2-P^2). Balanced three-phase line values produce total kVA; power factor separates real and reactive components.
How should I use the Three Phase Power Calculator result?
Unbalanced systems, harmonics, phase-to-neutral values, motor efficiency, and code sizing require a full electrical study.