How the calculator works
Where do the prices come from?
Live day-ahead wholesale spot prices from ENTSO-E for your selected country or price zone, shown per hour. These are the market prices — your final bill also includes grid fees, taxes and supplier margins.
What does "best time to run" mean?
We find the cheapest continuous window today that fits your appliance's run time, then compare it to running the appliance right now — so you can see how much you save by shifting a wash, dishwasher or EV charge to off-peak hours.
Is this my exact bill?
No — it's a wholesale-price estimate. If you're on a fixed tariff your price doesn't change by hour. It's most useful if you're on a dynamic/spot-priced contract.