1. What is the Watts to kWh Formula?

The Watts to Kilowatt-hours (kWh) formula converts power consumption in watts to energy consumption in kilowatt-hours, which is the standard unit for measuring electrical energy usage on utility bills.

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: This calculation converts watt-hours to kilowatt-hours by dividing by 1000, since 1 kilowatt equals 1000 watts.

3. Importance of Energy Calculation

Details: Understanding energy consumption helps in estimating electricity costs, comparing appliance efficiency, and managing energy usage for cost savings and environmental benefits.

4. Using the Calculator

Tips: Enter the power consumption in watts and the operating time in hours. Both values must be positive numbers. The result will show the energy consumption in kilowatt-hours (kWh).

5. Frequently Asked Questions (FAQ)

Q1: How do I convert kWh back to watts?
A: To find watts when you know kWh and hours: \( W = \frac{kWh \times 1000}{h} \).

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

Q4: Why is kWh used for electricity bills?
A: kWh measures total energy consumption over time, which is what utilities charge for.

Q5: Can I use this for DC and AC power?
A: Yes, as long as you're using the correct wattage value. For AC devices, use the actual power consumption (not just voltage × current).