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Line to Phase Voltage Calculator
Convert three-phase line-to-line (V_LL) and line-to-neutral (V_LN) voltages for balanced and phasor cases. Includes formulas, examples (230/400, 480/277), and conversion guidance.
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Voltage Imbalance Calculator
Calculate percent voltage imbalance (PVU) using both phase-deviation and negative-sequence methods. Includes formulas, examples, and troubleshooting tips.
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Line-to-Line Voltage Calculator
Convert between line-to-line (V_LL) and line-to-neutral (V_LN) voltages, compute phasor line voltages from phase voltages, and check common system voltages (230/400, 277/480, 240/415).
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How to Find 3 Phase Neutral Current
Calculate the neutral (return) current in 3-phase, 4-wire systems from phase currents or phasors — includes formulas, converter table, sample calculations, and FAQs.
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Negative Sequence Voltage Calculator
Calculate negative sequence voltage from three-phase voltages using symmetrical components. Helps assess unbalance and protect rotating machines.
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3 phase power calculator
Compute 3-phase real power (kW), apparent (kVA), and reactive (kVAr) using √3·V·I and power factor. Supports line voltage/current and balanced loads.
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line to phase current calculator
Convert three-phase line current to phase current and vice versa in star (Y) and delta (Δ) systems for accurate AC circuit analysis.
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line current calculator
Convert power, phase current or voltage into line current for DC, single-phase and three-phase (wye/delta) systems. Includes formulas, examples, and FAQs.
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neutral current calculator
Compute neutral current from unbalanced 3-phase line-to-neutral loads. Enter Ia, Ib, Ic (A) to get In (A) instantly—plus formula, sample table, and FAQs.
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current imbalance calculator
Calculate percentage current imbalance in three-phase systems using % I imb= {(Imax - Iavg) / Iavg} * 100
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phase to ground voltage calculator
Calculate phase-to-ground voltage in single-phase and three-phase systems. Essential for power distribution, grounding checks, and electrical safety.
3-Phase & Single-Phase Calculators: Free AC Power Tools
Solve AC power calculations for both single-phase and three-phase systems with our free online calculators. Whether you are sizing a residential breaker panel, designing an industrial motor circuit, or converting between kW and kVA, these tools deliver precise results in seconds. Enter your voltage, current, power factor, and phase configuration to calculate real power, apparent power, and line current instantly. Electricians use single-phase calculators for home wiring and lighting loads, while three-phase tools handle commercial motors, transformers, and distribution panels. Each calculator includes formula breakdowns, unit conversions, and NEC reference values to ensure accurate system design. No downloads or signups required—access from any device and switch between phase types effortlessly. From 120V household circuits to 480V industrial installations, our phase calculators simplify complex AC math for every skill level.