1. What is 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 to measure energy consumption.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( W \) — 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 in kWh helps estimate electricity costs, compare appliance efficiency, and understand energy usage patterns.

4. Using the Calculator

Tips: Enter power in watts and time in hours. Both values must be positive numbers. For devices that list power in kW, multiply by 1000 to convert to watts first.

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: How do I calculate my electricity bill from kWh?
A: Multiply total kWh by your electricity rate (price per kWh). For example, 100 kWh at $0.15/kWh = $15.

Q3: What's the difference between kW and kWh?
A: kW measures power (rate of energy use), while kWh measures energy (power × time).

Q4: How can I reduce my kWh consumption?
A: Use energy-efficient appliances, turn off unused devices, and reduce usage time of high-power appliances.

Q5: Is this calculation accurate for all devices?
A: This works for devices with constant power draw. For variable power devices, you may need more complex measurements.