How this tool works
Daily cost = kW x hours per day x rate. Monthly and yearly figures multiply that daily estimate.
Home and Bills
Appliance Running Cost Calculator
Estimate the daily, monthly and yearly cost of an appliance that runs for part of each day.
What to do with the answer
Estimate the daily, monthly and yearly cost of an appliance that runs for part of each day. The useful part is not just the first answer; it is checking whether the answer still makes sense when the uncertain number changes.
Quick check
- Read the result label first so you know whether it is monthly, yearly, daily, a percentage, a date or a total.
- Change the input you are least sure about and compare the second answer with the first.
- Use a related guide or worksheet when the result affects a bill, budget, health target, study plan or purchase.
Use the result in the planner
Run this for one appliance, then copy the daily, monthly or yearly estimate into the Home Energy Audit Planner. Put the device in its real room so you can compare the items you actually use, not just one isolated number.
If one appliance looks expensive, change the hours first. A timer, shorter cycle or different routine may be more realistic than replacing the device straight away. Keep the original estimate beside the second version so the change is easy to explain later.
Check the inputs first
The answer depends on power use, hours per day and price per kWh. Appliance labels can show maximum power rather than typical use, so mark the planner row as low confidence if the number is only a rough label reading.
Use the planner to separate everyday devices from seasonal devices. That avoids treating a winter heater, tumble dryer or occasional tool like it runs the same way all year.
When this estimate helps
Use this page when a device runs for part of the day and you want to see daily, monthly and yearly cost side by side. It is especially useful for heaters, dryers, dehumidifiers, aquariums, freezers, computers, consoles and workshop tools because both power and time can change the answer quickly.
After calculating, write the result into the Home Energy Audit Planner with the room name and confidence level. A low-confidence row is not a failure; it simply means the next step is to measure the device, check the manual or run a cautious version. A high-cost row with good confidence is the better place to choose a habit change, timer, repair or replacement comparison.