1. What is Kilowatt-hour (kWh)?

A kilowatt-hour (kWh) is a unit of energy that represents the amount of electricity consumed by a 1,000-watt appliance running for one hour. It's the standard unit used by utility companies for billing purposes.

2. How Does the Calculator Work?

The calculator uses the watt usage formula:

Where:

• \( kWh \) — Energy consumption in kilowatt-hours
• \( P \) — Power consumption in watts (W)
• \( h \) — Time in hours

Explanation: The formula converts watt-hours to kilowatt-hours by dividing by 1,000 (since 1 kilowatt = 1,000 watts).

3. Importance of Energy Calculation

Details: Calculating energy consumption helps estimate electricity costs, compare appliance efficiency, and understand your energy footprint.

4. Using the Calculator

Tips: Enter the appliance's power rating in watts and the duration of use in hours. For multiple appliances, calculate each separately and sum the results.

5. Frequently Asked Questions (FAQ)

Q1: How do I find an appliance's wattage?
A: Check the label or manual. If only amps and volts are listed, multiply them (P = I × V).

Q2: What's the difference between watts and watt-hours?
A: Watts measure power (rate of energy use), while watt-hours measure total energy consumed over time.

Q3: How can I reduce my kWh consumption?
A: Use energy-efficient appliances, turn off unused devices, and reduce usage time of high-power appliances.

Q4: How does this relate to my electricity bill?
A: Utility companies charge per kWh. Multiply your kWh result by your local rate to estimate cost.

Q5: What's a typical kWh usage for household appliances?
A: A 60W bulb running 5 hours = 0.3 kWh. A 1,500W heater running 2 hours = 3 kWh.