1. What is the Watts to kWh Formula?

The formula converts power consumption in watts to energy units in kilowatt-hours (kWh). This calculation helps determine electricity usage for billing and energy monitoring purposes.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( W \) — Power consumption in watts
• \( h \) — 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. Understanding Electricity Units

Details: Electricity is typically billed in kilowatt-hours (kWh), which represents using 1000 watts of power for 1 hour. This calculator helps estimate energy costs by converting device wattage to standard billing units.

4. Using the Calculator

Tips: Enter the device's power consumption in watts and the duration of use in hours. For appliances with variable power, use average wattage.

5. Frequently Asked Questions (FAQ)

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

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

Q3: How accurate is this calculation?
A: It's accurate for constant power devices. For devices with varying power (like refrigerators), use an energy monitor for precise measurement.

Q4: Can I calculate my electricity bill with this?
A: Yes, multiply the kWh result by your electricity rate (cost per kWh) to estimate cost.

Q5: What's a typical kWh consumption for household appliances?
A: LED bulb: 0.01 kWh/hour, Laptop: 0.05 kWh/hour, Microwave: 1.5 kWh/hour, AC: 3.5 kWh/hour.