1. What is Kilowatt-hour (kWh)?

A kilowatt-hour (kWh) is a unit of energy equal to one kilowatt (1 kW) of power expended for one hour (1 h) of time. It's the standard unit used by electric utilities for billing purposes.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( kWh \) — Kilowatt-hours (energy)
• \( W \) — Power in watts
• \( h \) — Time in hours
• 1000 — Conversion factor (1000 watts = 1 kilowatt)

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

3. Importance of Energy Calculation

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

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers. The calculator will automatically convert to kWh.

5. Frequently Asked Questions (FAQ)

Q1: How many kWh is 1000 watts for 1 hour?
A: Exactly 1 kWh (1000 watts × 1 hour ÷ 1000 = 1 kWh)

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

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

Q4: What's a typical kWh consumption for household appliances?
A: Refrigerator: 1-2 kWh/day, LED bulb: 0.01 kWh/hour, AC unit: 3-5 kWh/hour.

Q5: Can I use this for DC circuits?
A: Yes, the calculation works the same for both AC and DC power.