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Calculated result—
Planning estimate only. Check units and verify critical results independently.
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Electrical calculatorMotor Current Calculator
Estimate single-phase or three-phase AC motor current from power, voltage, efficiency and power factor.
Practical guidance
Use consistent units and check the context.
Estimate single-phase or three-phase AC motor current from power, voltage, efficiency and power factor. The calculator is designed for quick workshop, maintenance and engineering planning. For specifications, certification or safety-critical work, verify the answer independently.
Common mistakes
- Using output kW as electrical input without efficiency
- Ignoring power factor
- Sizing protection or cable solely from a simplified estimate
Frequently asked questions
What does this calculator do?
Estimate single-phase or three-phase AC motor current from power, voltage, efficiency and power factor.
Is the answer exact?
The mathematics follows the inputs shown, but real systems can include tolerances, losses, temperature effects and installation conditions.