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Appliance Running Cost Calculator

Estimate how much each appliance costs to run using its wattage, usage pattern, standby power and your electricity rate. Great for spotting high-cost devices, comparing habits and seeing where your electricity spend may really be going.

Enter your appliance details

Example default: 27p per kWh.

Usually 365 unless you want to model a different period basis.

Appliance Power (W) Hours/day Days/week Qty Standby (W) Standby hrs/day Action

Add as many appliances as you need. Use fractions for short usage periods, such as 0.25 for 15 minutes.

Estimated annual cost £0.00
Average monthly cost £0.00
Average weekly cost £0.00
Average daily cost £0.00

Appliance breakdown

Appliance Active kWh/year Standby kWh/year Total kWh/year Annual cost Monthly average
Total 0.00 0.00 0.00 £0.00 £0.00

Summary and inputs used

Electricity unit rate 27.00p/kWh
Appliances included 0
Annual active electricity 0.00 kWh
Annual standby electricity 0.00 kWh
Total annual electricity 0.00 kWh
Days per year basis 365
Highest annual cost item None selected

How to read this estimate

  • Active usage is based on watts × hours per day × days per week × 52 weeks × quantity.
  • Standby usage is based on standby watts × standby hours per day × days in the year × quantity.
  • Using fractions can help with short usage periods, such as 0.25 hours for 15 minutes.
  • Results are estimates and will differ if your tariff changes, if usage varies seasonally, or if the appliance power draw changes in real use.

How this appliance cost calculator works

This calculator estimates electricity cost from the appliance details you enter. For each appliance, it converts wattage into kWh based on how many hours the item runs, how many days per week it is used, how many units you own and any standby consumption you include.

What to enter

  • Appliance name so you can identify each row in the results.
  • Power draw in watts while the appliance is actively running.
  • Hours per day and days per week to estimate annual usage.
  • Quantity if you have more than one of the same appliance.
  • Standby watts and standby hours if the appliance still draws power when not in use.
  • Electricity unit rate in pence per kWh from your tariff.

When this tool is useful

It is useful for budgeting, comparing whether an appliance is expensive to keep running, checking if standby usage is worth reducing, and working out whether replacing an older appliance might save money.

Important note

This is an estimate, not a supplier bill recreation. Real electricity costs can differ because of tariff changes, time-of-use pricing, discounts, direct debit smoothing, meter accuracy, seasonal usage swings and household behaviour.