1. What is kWh Calculation?

The kilowatt-hour (kWh) calculation measures electrical energy consumption. It represents the amount of energy used by a device with a power rating of one kilowatt operating for one hour.

2. How Does the Calculator Work?

The calculator uses the kWh formula:

Where:

• \( P \) — Power in watts
• \( t \) — Time in hours
• 1000 — Conversion factor from watts to kilowatts

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

3. Importance of kWh Calculation

Details: Calculating kWh helps estimate electricity costs, compare energy efficiency of appliances, and understand power consumption patterns for better energy management.

4. Using the Calculator

Tips: Enter power consumption in watts and operating time in hours. Both values must be positive numbers. The result shows energy consumption in kilowatt-hours.

5. Frequently Asked Questions (FAQ)

Q1: How do I find my appliance's power rating?
A: Check the manufacturer's label or specifications, usually listed in watts (W) or kilowatts (kW).

Q2: What's the difference between kW and kWh?
A: kW measures power (energy per unit time), while kWh measures energy (power × time).

Q3: How can I estimate monthly electricity costs?
A: Multiply kWh by your electricity rate (cost per kWh) and by days of usage.

Q4: Do motors consume more power when starting?
A: Yes, motors typically have higher starting currents, but this calculator assumes continuous operation.

Q5: How accurate is this calculation?
A: It provides theoretical consumption. Actual usage may vary based on motor efficiency, load, and operating conditions.