Amps to HP Calculator

Estimate electric motor horsepower based on current (Amps), voltage, and phase. Useful for verifying motor ratings.

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Motor Specs

Estimated Motor Power

-- HP
Electrical Power: -- kW
Calculation formula here

Understanding the Conversion

Horsepower (HP) is a unit of power typically used for mechanical output (like engines and motors), while Watts (W) are used for electrical power. Knowing the conversion helps you size generators for motors and vice-versa.

  • Electrical Horsepower: Used for electric motors. 1 HP(E) = 746 Watts.
  • Mechanical Horsepower: Often called Imperial HP. 1 HP(I) ≈ 745.7 Watts.
  • Metric Horsepower: Used in Europe/Asia. 1 PS/CV ≈ 735.5 Watts.

This calculator uses the standard electrical conversion of 1 HP = 746 Watts.

Formulas Used:

Single-Phase HP = (I × V × Eff × PF) / 746
Three-Phase HP = (I × V × 1.732 × Eff × PF) / 746

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