Should I use rated watts or measured watts?
Use measured average watts when possible. Rated watts are often a maximum and can overestimate annual cost for thermostats, compressors and variable-speed devices.
Calculator
Appliance Energy Cost Calculator
Estimate the real electricity cost of an appliance before buying it or running it heavily.
Estimated cost
€65.52 / year
kWh / year204.8 kWh
Average monthly cost€5.46
Average daily cost€0.18
Running energy197.1 kWh
Standby energy7.6 kWh
Calculation basis
Active energy uses 176 W on average for 1,120 h/year. Standby is calculated across the remaining 7,640 h, so no hours are counted twice.
Frequently asked questions
Does standby power matter?
Small standby loads matter when they run all year. A 3 W standby draw is about 26 kWh per year.
Why does the result show an average daily cost?
Seasonal appliances may only run a few months, so the daily average spreads the annual cost across the full year.
Related buying tools
Continue with the most relevant calculator or guide.
HomeSpecLab works best when calculators, buying guides and product picks reinforce each other. Use these links to move from sizing to shopping criteria.
Power bank capacity calculatorCalculate mAh, Wh and USB-C output for phones, tablets and laptops.How to choose the right power bankUnderstand mAh, Wh, ports, laptop compatibility and travel limits.Home battery sizing calculatorEstimate kWh, backup time, inverter power and solar storage needs.How to choose a home batteryCompare capacity, backup circuits, inverter power and solar compatibility.Product picksOpen the current affiliate product shortlist after choosing the right specs.
Affiliate disclosure: HomeSpecLab may earn commissions from qualifying purchases through affiliate links. Product suggestions and sponsored placements are kept clearly identified where relevant. Learn more.