# Horsepower to Amps Calculator

> Convert motor mechanical horsepower (HP) to electric current in amps for DC, single-phase, and three-phase AC motors.

**URL:** https://www.calculatoranswers.com/horsepower-to-amps-calculator
**Category:** Education

## Quick Answer

Convert motor mechanical horsepower to current in amperes. Input horsepower, voltage, efficiency, and power factor to find amps.

## Definition

A horsepower to amps calculator computes the electrical current requirements of a mechanical motor based on its rated horsepower (HP). Since mechanical work must account for internal thermal and magnetic losses, the tool converts horsepower to electrical watts (using the constant 746 watts per HP) and adjusts for the motor's efficiency and power factor. Electrical designers use it to size motor starters, contactors, and branch circuit protection.

## How to Use

1. **Choose current type** — Select DC, AC single-phase, or AC three-phase configuration.
2. **Enter values** — Input the motor horsepower, voltage, efficiency, and power factor.
3. **Calculate** — Read the computed current draw in amperes for motor sizing.

## Disclaimer

This calculator provides estimates for educational and planning purposes. Always consult a qualified professional for specific advice on financial, medical, legal, or other regulated decisions.

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