1. What is kWh?

A kilowatt-hour (kWh) is a unit of energy that represents the amount of electricity consumed over time. It's commonly used by utility companies to measure and bill for electricity usage.

2. How Does the Calculator Work?

The calculator uses the kWh formula:

Where:

• \( P \) — Power in watts (W)
• \( h \) — 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 = 1000 watts).

3. Importance of kWh Calculation

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

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: How many kWh is 100 watts for 10 hours?
A: 100 watts × 10 hours = 1000 watt-hours = 1 kWh

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

Q3: How can I estimate my electricity bill using kWh?
A: Multiply kWh by your electricity rate (price per kWh) to estimate cost.

Q4: What's a typical kWh usage for a household?
A: In the US, average is about 877 kWh per month (varies by region and home size).

Q5: How can I reduce my kWh consumption?
A: Use energy-efficient appliances, LED lighting, and turn off devices when not in use.