1. What is a HP to kWh Calculator?

Definition: This calculator converts mechanical power (horsepower) to electrical energy (kilowatt-hours) over a specified time period.

Purpose: It helps estimate electrical energy consumption for motors and engines, useful for energy management and cost calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E_{kWh} \) — Energy in kilowatt-hours
• \( HP \) — Power in horsepower
• \( t \) — Time in hours
• 0.746 — Conversion factor (1 HP = 0.746 kW)

Explanation: The formula converts horsepower to kilowatts, then multiplies by time to get energy consumption.

3. Importance of HP to kWh Conversion

Details: This conversion is essential for estimating electricity costs, sizing generators, and comparing energy efficiency of different motors.

4. Using the Calculator

Tips: Enter the horsepower rating of your motor and the operating time in hours. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why 0.746 in the formula?
A: This is the conversion factor between horsepower and kilowatts (1 HP = 0.746 kW).

Q2: Does this account for motor efficiency?
A: No, this gives theoretical energy. For actual consumption, divide result by motor efficiency (typically 0.8-0.95).

Q3: Can I use this for multiple motors?
A: Yes, either calculate each separately or sum their HP values if they run simultaneously.

Q4: How do I estimate electricity cost from this?
A: Multiply kWh result by your electricity rate (e.g., $0.12/kWh).

Q5: What if my motor isn't running at full load?
A: Multiply the HP by the load percentage (e.g., 0.75 for 75% load) before calculating.