Calculator of electricity cost
Calculate online how much your appliances cost in kWh and currency. Select your country to get a local tariff estimate, then edit to match your provider.
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Electricity cost calculation formula
Cost (EUR) = Power (kW) × Time (h/day) × 30 × Tariff (EUR/kWh)
where: Power — appliance consumption in kilowatts (W ÷ 1000), Time — average daily operating time, 30 — number of days in a month, Tariff — 0.28 EUR/kWh (approximate 2026).
Example: boiler 2 kW, 2 h/day:
2 × 2 × 30 × 0.28 = €34 (120 kWh)
To calculate the cost of one kWh, simply multiply consumed kilowatt-hours by your tariff: for example, 100 kWh × 0.28 = €28. This is the amount shown on your electricity bill.
How to calculate electricity costs?
Formula: Cost = Power (kW) × Time (h/day) × 30 days × Tariff (per kWh). Example: a 2 kW water heater running 2 h/day costs roughly 2 × 2 × 30 × 0.28 = ~€34/month at the EU average tariff.
Largest consumers in a typical home: air conditioner (~€40–90/month in summer), water heater (~€15–30/month), washing machine (~€5–10/month), refrigerator (~€5–8/month). LED lighting is a relatively small consumer.
Average residential electricity tariffs across the EU range from €0.20 to €0.40/kWh (incl. VAT, 2024–2025). Germany is among the highest at ~€0.35/kWh; Spain and France are lower at €0.22–0.26/kWh. Use the country selector above to load a starting estimate for your region, then edit the tariff to match your provider's rate.
When planning your electricity budget, factor in seasonality: summer increases air conditioning usage (200–350 kWh/month per unit), while winter raises heating and hot water consumption. A typical European household uses 200–400 kWh/month, varying by country and dwelling size.
Most effective ways to lower your bill: switch to LED lighting (80% less energy), choose A+++ rated appliances, run washing machines and dishwashers at off-peak hours if your tariff has day/night zones, and consider a heat pump instead of direct electric heating.