Use our powerful Horsepower to Amps calculator to instantly convert HP ratings into electrical current (Amps) for various applications. This tool is crucial for electricians, engineers, and DIYers to accurately size wires, circuit breakers, and ensure proper motor operation in both AC and DC systems.
Formula:
Formulas for Horsepower to Amps Conversion:
The conversion from horsepower (HP) to amps (A) depends on the electrical system type (DC, Single-Phase AC, or Three-Phase AC), voltage, power factor, and efficiency.
- DC Power: I = (HP × 746) / V
- Single-Phase AC: I = (HP × 746) / (V × PF × Eff)
- Three-Phase AC: I = (HP × 746) / (V × PF × Eff × √3)
Where:
- I = Current in Amperes (A)
- HP = Power in Horsepower
- V = Voltage in Volts (V)
- PF = Power Factor (unitless, e.g., 0.8 for inductive loads)
- Eff = Motor Efficiency (unitless, e.g., 0.85 for 85% efficiency)
- 746 = Conversion constant (1 HP = 746 Watts)
- √3 ≈ 1.732 (for three-phase systems)