EV Calculators

Every calculator on this page reads from the same place. If you press My EV in the header and pick your car, all seven of them switch to your battery size, your efficiency and your range — and so do the reference tables inside the guides. You do not re-enter your specifications on each page, and you do not have to remember them.

You can do the same with prices, and this is where most of the accuracy comes from. Every charging tier is editable: put in the overnight rate your retailer actually gives you, your standard rate, what the charger you actually use charges, and the petrol price at your local servo. Every cost figure across the site then recalculates against your numbers rather than the site’s defaults. If you do not know your rates offhand, picking your state loads a typical local standard rate as a starting point — the Ofgem cap varies by distribution region — and you can refine it whenever you next look at a bill. Nothing is uploaded and no account is required: the details stay in your own browser and you can clear them whenever you like.

There are seven, and they answer genuinely different questions. Picking the right one is usually a matter of deciding what unit you want the answer in.

You want to know what one charge costs

Use the EV charging cost calculator. It takes a battery size, a charge window and a price per kilowatt-hour, and tells you what that session costs. It handles an everyday top-up, a full charge, or any window you set — useful because most people rarely charge from empty to full.

You want to know what the car costs to run over time

Use the EV running cost calculator. This is the one that converts your driving into cost per mile, per 100 miles, per month and per year from a single set of inputs. If you are trying to work out an annual budget, start here.

You want to compare against petrol

Use the EV vs petrol cost calculator. It puts electricity and fuel side by side at every electricity price tier, so you can see how much the answer depends on where you charge. Bring your petrol car's real measured fuel consumption rather than the brochure figure.

You want to know how long a charge takes

Use the EV charging time calculator for the duration of a specific charge, or the EV charging speed calculator if you would rather think in miles of range added per hour. They are two views of the same physics; the second is often more intuitive when comparing charger types.

You are planning a journey

Use the EV trip cost calculator for what a journey costs in electricity, including a road trip mode that estimates charging stops. Pair it with the EV range calculator if you want to know how far the car will actually go, which is rarely the number on the spec sheet once highway speed and weather are taken into account.

Every default figure these calculators start with — electricity price tiers, charger power levels, typical efficiency, petrol price — is defined in one place and documented on the methodology page. Nothing is hardcoded into an individual calculator, which means the whole site stays internally consistent: the figure you see in a guide table is produced by the same source as the figure in the calculator next to it.

The presets are starting points, not claims about your situation. Electricity pricing in the UK varies by retailer, region, tariff and time of day, and public charging prices vary between networks and individual sites. Treat the output as a well-founded estimate to plan with, and replace the defaults with your own figures wherever you know them — that is what the calculators are for.