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How prices are calculated
Units, timezones, historical coverage and what the calculator does — without hidden assumptions.
Spot price and units
The source provides EUR/MWh without VAT. To display cents/kWh, divide EUR/MWh by 10. The optional VAT display uses each country's standard rate and is illustrative only.
Time and market intervals
Prices are recorded with UTC timestamps and the market's original 60-minute or 15-minute duration. The day-ahead market moved to 15-minute delivery intervals on 1 October 2025. Local time is used for display; repeated autumn clock hours are distinguished by UTC offset.
Daily and monthly values
Average price is weighted by each interval's real duration, including 23-hour and 25-hour days. Missing source dates are never counted as zero and partial months are explicitly indicated.
Cost estimate
The planning calculator estimates only the exchange-price portion of electricity consumption, assuming uniform use over the selected window. Grid charges, fixed fees, taxes and retailer margin are not included. It is not a final bill.