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.
What does it cost to run?
Straight answers at the Ofgem price cap unit rate of 26.32p per kWh (1 October to 31 December 2026). Prices last checked 26 September 2026, from Ofgem.
En français : calculer le coût de l’électricité au Tarif Bleu.
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 toolHeater running cost calculator
See what a portable electric heater can add to your energy bill.
HeatingAir fryer running cost calculator
Estimate the cost of one cooking session or a month of regular use.
KitchenGaming PC electricity cost calculator
Use measured or estimated wattage to price your gaming sessions.
ComputingSolar savings calculator
Estimate the value of self-used solar electricity plus exported energy.
SolarFridge freezer running cost calculator
Estimate the always-on running cost of a fridge or fridge-freezer.
KitchenA 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 exampleCompare the scenario, not just the appliance.
Three planning tools for the decisions a single-appliance calculator cannot answer: where the electricity actually goes, whether a tariff shift is worth it, and whether an upgrade pays for itself.
Whole-home energy budget planner
Add several appliances at once and see monthly kWh, cost and the largest cost driver.
PlannerTime-of-use shift calculator
Model moving a load from a peak rate to an off-peak rate on your own tariff.
TariffAppliance upgrade payback calculator
Check how long electricity savings would take to recover the cost of a replacement.
Break-evenSame 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.
Every European bill breaks down the same way
An energy price, sometimes a fixed subscription, and a set of network costs and taxes. What differs by country is who sets each part and what it's called.
Understand your bill, not just the maths.
Plain-English explainers on how European electricity is priced and billed, and where the savings actually are.
Have a wattage and a tariff?
That is enough to get a useful running-cost estimate.