Know what every watt costs.
Free electricity calculators for households across Europe. Enter your own tariff, see the formula, and get an answer in seconds.
Start with the device you use.
No account, no supplier sign-up, no hidden assumptions. Your tariff stays in your browser and the maths is shown plainly.
Electricity Cost Calculator
Convert watts, hours and your unit rate into daily or monthly running cost.
Core toolEV Charging Cost
Estimate energy from the wall, charging losses and the cost of a trip.
EVHeater Cost
See what a portable electric heater can add to your energy bill.
HeatingAir Fryer Cost
Estimate the cost of one cooking session or a month of regular use.
KitchenGaming PC Cost
Use measured or estimated wattage to price your gaming sessions.
ComputingSolar Savings
Estimate the value of self-used solar electricity plus exported energy.
SolarA kilowatt-hour measures energy, not power. Once you know kWh, multiply by your electricity price per kWh.
Understand kWhBecause tariffs differ by country, supplier and plan, EuroWattCalc asks for your own rate instead of pretending one price fits everyone.
See a worked exampleSame maths. Different bills.
Use a country guide to see which number on your bill belongs in the calculator and which fixed charges sit outside the estimate.
Have a wattage and a tariff?
That is enough to get a useful running-cost estimate.