Watts to kWh Conversion

Energy Formula:

\[ E_{kWh} = \frac{P_w \times t}{1000} \]

Energy (E_kWh): kWh

Definition: This calculator converts power in watts to energy in kilowatt-hours based on usage time.

Purpose: It helps estimate electrical energy consumption for appliances, devices, or systems.

The calculator uses the formula:

\[ E_{kWh} = \frac{P_w \times t}{1000} \]

Where:

Explanation: The power in watts is multiplied by time in hours, then divided by 1000 to convert to kWh.

Details: Accurate energy calculations help in understanding electricity consumption, estimating costs, and improving energy efficiency.

Tips: Enter the power consumption in watts and the duration of use in hours. Both values must be > 0.

Q1: Why divide by 1000?
A: 1 kilowatt equals 1000 watts, so dividing by 1000 converts watt-hours to kilowatt-hours.

Q2: How do I find an appliance's power rating?
A: Check the label, manual, or manufacturer specifications. Some devices show power in watts (W).

Q3: Can I use minutes instead of hours?
A: Yes, but convert minutes to hours first (divide by 60) before entering the value.

Q4: What's a typical power rating for household items?
A: LED bulb: 5-15W, Laptop: 50W, Refrigerator: 100-400W, Microwave: 600-1200W.

Q5: How can I estimate my electricity bill?
A: Multiply the kWh result by your electricity rate (cost per kWh from your utility company).