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Number Convert
numberconvert.com
Convert electrical units with this free three phase calculator. Essential for electronics and electrical engineering.
Physics2 options compared
Three Phase Calculator
Calculates apparent, active, and reactive powers in an AC circuit using input values such as line voltage, current, and power factor. Helps users in electrical engineering, electronics, and HVAC fields to analyze and design three-phase systems efficiently. Engineers, electricians, and technicians who work with alternating current (AC) circuits would find this tool invaluable for quick assessments...
Editors’ Top PickBased on community votes
Other OptionsRanked by votes
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02Omni Calculatoromnicalculator.comThe three-phase calculator helps you estimate apparent, active, and reactive powers in an AC circuit.
Side by side
Three Phase Calculator options compared
| Tool | Best for | Strengths | Limitations |
|---|---|---|---|
| Number Convert numberconvert.com | Quick three-phase power conversion |
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| Omni Calculator omnicalculator.com | Learning three-phase power relationships |
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Buyer's guide
How to choose a three phase calculator
When you already know the voltage, current, and power factor and just need the power numbers, a dedicated converter like Number Convert gets you there faster. If you are trying to understand how line and phase quantities relate, or if you need to solve for an unknown voltage or current, Omni Calculator’s additional fields and explanations are worth the extra clicks.
Questions
Three Phase Calculator FAQ
- How do I calculate three-phase power?
- The standard formula is P = √3 × V_line × I_line × PF. Multiply the line voltage, line current, and power factor, then by approximately 1.732 to get the total active power in watts or kilowatts.
- What is the difference between apparent, active, and reactive power?
- Apparent power (kVA) is the total power flowing in the circuit, active power (kW) is the portion that does actual work, and reactive power (kVAR) is the portion stored and released by inductive or capacitive loads. The power factor is the ratio of active to apparent power.
- Can I use these calculators if I only know the phase voltage and current?
- Yes, but you will need to know the connection type (star or delta) to convert phase quantities to line quantities. Omni Calculator includes options for both configurations, while Number Convert assumes line inputs.
- Why does three-phase power use the square root of 3?
- The √3 factor accounts for the 120-degree phase shift between the three conductors. It converts the sum of the phase voltages and currents into the equivalent line-to-line values used in the power formula.
- Is power factor important for three-phase calculations?
- Yes, the power factor directly scales the result. A lower power factor means more apparent power is required to deliver the same amount of active power, which can increase current and cause inefficiencies in the system.
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