EV Home vs Public Charging Cost Calculator
Compare charging-session, annual and per-kilometre costs using your two energy prices. An optional actual installation quote adds static payback.
A QUICK WALKTHROUGH
How to use this tool
- Compare charging-session, annual and per-kilometre costs using your two energy prices.
- Calculate the result.
- Copy the report or download it as TXT.
Formula and units
Session energy = capacity × percent/100. Session cost = energy × price; annual = session cost × weekly frequency × 52. Per-km cost = capacity × price ÷ full-charge distance. Optional payback = your installation quote ÷ (annual public − annual home), only when that difference is positive. A zero quote gives zero years with positive annual saving.
Scope
Capacity, frequency and prices are nonnegative, percentage is 0–100 and distance is positive. Frequencies may be fractional. Both prices use the same currency. No losses, service fees, taxes, tariffs or typical driving range are inferred. This is arithmetic, not a price or charging recommendation. The quote is supplied by you; no property, brand or typical installation price is inferred. Payback is static, excluding financing, tariff changes and other expenses.
Local processing
Your entries stay in your browser. Copy and TXT export include the inputs, formula and scope.
GOOD TO KNOW
Common questions
How should I use the result?
Use it as an arithmetic estimate based on your supplied inputs.