Analyze line voltage for balanced three phase systems. View phase values and optional power metrics. Export results, review formulas, and follow simple steps below.
| Connection | Mode | Input Voltage (V) | Line Voltage (V) | Phase Voltage (V) |
|---|---|---|---|---|
| Wye / Star | Phase to Line | 230.00 | 398.37 | 230.00 |
| Wye / Star | Line to Phase | 415.00 | 415.00 | 239.60 |
| Delta | Phase to Line | 400.00 | 400.00 | 400.00 |
| Delta | Line to Phase | 480.00 | 480.00 | 480.00 |
Balanced Wye / Star: Line Voltage = √3 × Phase Voltage
Balanced Wye / Star: Phase Voltage = Line Voltage ÷ √3
Balanced Delta: Line Voltage = Phase Voltage
Balanced Delta: Phase Voltage = Line Voltage
Apparent Power: S = √3 × VL × IL
Real Power: P = √3 × VL × IL × PF
Reactive Power: Q = √3 × VL × IL × sin(φ)
Power outputs are shown in kVA, kW, and kVAR after dividing by 1000.
A 3 phase line voltage calculator helps engineers convert between phase voltage and line voltage in balanced electrical systems. It supports fast checks during design, installation, testing, and maintenance work. This tool is useful for panels, motors, feeders, drives, and industrial power distribution studies.
Line voltage is the voltage measured between any two line conductors. It is critical when you size equipment, compare supply conditions, or verify nameplate ratings. A wrong voltage assumption can affect motor performance, power calculations, insulation stress, and overall system safety.
Three phase systems are commonly wired as Wye or Delta. In a balanced Wye connection, line voltage equals phase voltage multiplied by the square root of three. In a Delta connection, line voltage equals phase voltage. This calculator handles both cases without manual rearrangement.
The tool can also estimate apparent power, real power, and reactive power when line current and power factor are entered. That makes it practical for quick load reviews. You can move from a basic voltage conversion to a more complete operating picture in one step.
Use it during cable planning, switchgear checks, generator reviews, motor circuit setup, HVAC equipment validation, and commissioning tasks. It is also handy when comparing measured field values against expected design values. Small calculation errors often create larger troubleshooting delays later.
This calculator assumes a balanced three phase system. It does not model harmonics, severe voltage imbalance, or transient events. For advanced protection studies, waveform analysis, or fault calculations, a detailed engineering model is still required. For routine voltage conversion, this tool stays fast and reliable.
CSV export helps with spreadsheets, reports, and job records. The PDF option supports print review and documentation. The example data table, formulas, and instructions also make the page useful for training, classroom work, and technical reference during field visits.
Line voltage is the voltage measured between any two line conductors. It is different from phase voltage in Wye systems, but equal to phase voltage in balanced Delta systems.
For a balanced Wye system, line voltage equals phase voltage multiplied by √3. If phase voltage is known, use VL = √3 × Vph.
In a balanced Delta system, line voltage equals phase voltage. No √3 multiplier is needed for this specific voltage relationship.
Yes. Choose the line to phase mode. The tool will calculate phase voltage from the entered line voltage based on the selected connection type.
Those values let the calculator estimate apparent power, real power, and reactive power. This adds more engineering context than a voltage-only conversion.
No. It assumes a balanced three phase system. Unbalanced loads need phase-by-phase analysis and more detailed electrical calculations.
Yes. It is useful for motor feeders, control panels, variable speed drives, and quick voltage checks during commissioning or maintenance work.
Use the CSV button for spreadsheet-friendly data. Use the PDF button to print or save the page as a PDF from your browser.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.