For each row: monthly kWh = quantity × watts ÷ 1,000 × hours per day × days per month.
Use a household inventory, not a guess
A home energy plan is more useful when it begins with the devices that are actually present. Walk through the rooms and list equipment such as lighting, a television, a computer, a washing machine, an electric kettle, a refrigerator, or an air conditioner. The sample rows are only starting points—replace them with the devices and schedules in your home.
How to estimate the inputs
Use electrical input watts from a label, manual, or measurement. For devices used in short bursts, estimate the total time they are powered each day. For a washer, for example, use the cycle duration multiplied by cycles per day rather than assuming it runs all day. For a refrigerator or air conditioner, consider that the compressor may not be on continuously.
How to read the results
The total helps you rank estimated usage, not determine which appliance is automatically wasteful. A high-use air conditioner may be essential in a hot climate, while a small device left on continuously can contribute more than its low wattage suggests. Try changing one realistic input at a time and compare the result.
Why your total may differ from the bill
This planner estimates the appliance energy represented in the list. It does not automatically know your tariff bands, seasonal rates, service charges, taxes, power factor, solar generation, or devices you forgot to add. Keep the tariff consistent with the period you are planning, and use the utility bill as a check.
Related tools and guides
For the basic relationship between watts and kWh, read Watts vs. kilowatt-hours. You can also use the Home Energy Planner to combine several devices in one estimate.