EV planning tool
Octopus EV charging cost calculator
Estimate a home EV charging session against bounded published Agile, Go and Intelligent Go rates, including charging losses and a ready-by deadline.
Loading bounded published prices for the three supported tariff structures…
What the estimate includes
The calculation converts the requested battery percentage into battery energy, applies your charging-efficiency assumption, derives the minimum duration from charger power, and prices a gap-free published interval window. It preserves negative Agile costs and uses a partial final interval proportionally.
Important limits
This is an estimate, not a bill or tariff recommendation. It excludes standing charges because one session does not cause them. It does not model battery degradation, charging taper, vehicle sleep, charger throttling, other home demand or future prices. Intelligent Go results use published guaranteed bands only; extra supplier-controlled smart slots and dispatch are not assumed.
Check fit before switching
Read the EV tariff guide, then compare Agile vs Go, Agile vs Intelligent Go, or Go vs Intelligent Go. Confirm exact car, charger, meter and tariff eligibility with Octopus.