Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

# Electric Motor Calculator

## Calculate amps, hp and kVA for electrical motors.

The calculators below can be used to calculate electric motor amps, horsepower and 3-phase kVa.

### Calculate 3 Phase Apparent Power (kVA)

• RLA - "Running Load Amps" - current drawn during normal operation of electric motor.
• FLA - "Full Load Amps" - amount of current drawn when full-load torque and horsepower is reached for the motor. FLA is usually determined in laboratory tests. Note! - in the calculator above FLA is RLA + 25% .
• 1 hp = 0.745 kW

### Related Mobile Apps from The Engineering ToolBox

- free apps for offline use on mobile devices.

## Related Topics

• ### Electrical

Electrical engineering with units, amps and electrical wiring. Wire gauges, electrical formulas, motors and more.

## Related Documents

• ### AC - Active, Reactive and Apparent Power

Real, imaginary and apparent power in AC circuits.
• ### Asynchronous Induction Motors - Electrical Properties

Typical electrical motor data like nominal current, fuse, start ampere, size of contactor and circuit breaker - for asynchronous induction motors.
• ### Electric Circuit Diagram - Drawing Template

Online shareable electric circuit diagram.
• ### Electric Motors - 480 Volt Wiring

480V electrical motor wiring data - NEMA amps, starter size, HMCP size for motors ranging 1/2 to 500 hp.
• ### Electric Motors - Efficiency

Calculate electric motor efficiency.
• ### Electrical Motors - Frame Dimensions

Electrical motors NEMA frame dimensions.
• ### Electrical Motors - Horsepower vs. Voltage and Amps

Electrical motors horsepower rating vs. their ampere rating.
• ### Electrical Motors - Insulation Classes

Electrical motors NEMA temperature and insulation classes.
• ### Electrical Motors - Locked Rotor Design Code Letters

NEMA locked rotor indicating code letters for electrical motors.
• ### Electrical Vehicle Charging - Power vs. Voltage and Amps

EV Charging - AC vs. DC, single phase vs. three phase and power vs. voltage and amps.
• ### Electrotechnical Abbreviations

Abbreviations according the International Electrotechnical Commission (IEC).
• ### Heat Gain from Electrical Motors in Continuous Operation

Amount of heat transferred from electrical motor to ambient room vs. locations of fan and motor.
• ### NEMA - National Electrical Manufacturers Association

National Electrical Manufacturers Association.
• ### Polyphase Motors - Voltage Imbalance vs. Derating Factor

Increased voltage imbalance and decreased efficiency.
• ### Single Phase Power Equations

Power equations for single phased electrical systems.
• ### Three-Phase Electrtical Motors - Power Factor vs. Inductive Load

Inductive loads and power factors with electrical three-phase motors.

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## Citation

• The Engineering ToolBox (2005). Electric Motor Calculator. [online] Available at: https://www.engineeringtoolbox.com/electrical-motor-calculator-d_832.html [Accessed Day Month Year].

Modify the access date according your visit.

4.10.13

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