Free electricity calculators

Interactive tools using live ENTSO-E prices. Free, embeddable, attribution required.

Cheapest-hour calculator →
Find the cheapest hour in the next 24 hours to charge your electric car, run the dishwasher or boil the kettle. Live prices from ENTSO-E.
EV charging cost calculator →
Real-time charging cost for any electric vehicle in any European bidding zone. 12 model presets — Tesla, Polestar, ID.3, Ioniq 5 and more. With cost per 100 km.
Heat pump savings calculator →
Annual running cost of a heat pump in any European zone. Compares vs direct electric heating.
Cross-border price spread →
Today's biggest price gaps between European bidding zones — where it's cheap vs expensive, with arbitrage context.
Solar payback calculator →
How fast does a residential solar installation pay back at today's electricity prices? Latitude-based production estimate.