1. What is kWh Calculation?

The kWh (kilowatt-hour) calculation determines the energy consumption of an electric motor by multiplying its power rating by the operating time. It's the standard unit for measuring electrical energy usage.

2. How Does the Calculator Work?

The calculator uses the basic energy formula:

Where:

• \( kWh \) — Energy consumption in kilowatt-hours
• \( P \) — Power of the motor in watts
• \( t \) — Operating time in hours

Explanation: The formula converts watt-hours to kilowatt-hours by dividing by 1000, since 1 kilowatt = 1000 watts.

3. Importance of Energy Calculation

Details: Calculating energy consumption helps in estimating electricity costs, assessing motor efficiency, and planning energy usage in industrial or residential settings.

4. Using the Calculator

Tips: Enter motor power in watts and operating time in hours. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between kW and kWh?
A: kW (kilowatt) measures power (rate of energy use), while kWh (kilowatt-hour) measures energy (power × time).

Q2: How do I convert kWh to electricity cost?
A: Multiply kWh by your electricity rate (per kWh). For example, 10 kWh × $0.12/kWh = $1.20.

Q3: Should I use rated power or actual power?
A: For estimation, use motor's rated power. For precise calculation, measure actual power consumption.

Q4: Does motor efficiency affect this calculation?
A: This basic formula doesn't account for efficiency. For accurate results, factor in motor efficiency if known.

Q5: Can I use this for three-phase motors?
A: Yes, as long as you input the total power consumption in watts.