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 electrical energy usage.

2. How Does the Calculator Work?

The calculator uses the energy calculation formula:

Where:

• \( kWh \) — Kilowatt-hours (energy)
• \( W \) — Power in watts
• \( h \) — Time in hours

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

3. Importance of Energy Calculation

Details: Calculating energy consumption helps in understanding electricity usage, estimating utility bills, and making energy-efficient choices for appliances and devices.

4. Using the Calculator

Tips: Enter the power consumption in watts and the duration of use in hours. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How do I find the wattage of my appliance?
A: Check the label or manual of the appliance. It's usually listed in watts (W) or can be calculated from volts and amps (W = V × A).

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

Q3: How can I reduce my kWh consumption?
A: Use energy-efficient appliances, turn off devices when not in use, and consider using timers or smart plugs.

Q4: How does this relate to my electricity bill?
A: Utility companies charge per kWh consumed. Your bill shows the total kWh used multiplied by the rate per kWh.

Q5: Can I calculate kWh from volts and amps?
A: Yes, first calculate watts (W = V × A), then use the formula with hours to get kWh.