Compare electric car costs
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Sources and assumptions
Mileage and electricity price start with editable examples. Both cars use the same price: your home tariff, public charging price or average price per billed kWh. Annual cost is a projection at your mileage.
The driving figures exclude charging losses. Zero excludes an allowance; any other percentage is your assumption, not a measured loss. Billed electricity is divided by the retained fraction.
Road-test readings are converted from source Wh/km; recorded mixed-driving averages are derived from measured energy and distance. Displayed figures are rounded. At zero miles, annual cost is £0.
Summer and winter follow the source classification. Only available readings appear. Road-test speeds stay separate. Compare individual tested versions; battery, motor, wheel and trim choices can affect consumption.
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Individual vehicles and measured journeys
This calculator is ready for source-linked measured observations. Read the sample size and limitations beside each selection.
Road-test seasons use the collection’s own classification. The KU mixed-driving view groups June–August and December–February by logged UTC start date and supplies a distance-weighted recorded average. Routes, temperatures, tyres, loads and cars differ. These are not standardised head-to-head tests or an annual fleet average.
Some KU logged windows lack intermediate readings. Their averages use measured start and end energy and distance counters without filling those gaps; activity and conditions inside gaps cannot be reconstructed.
Missing seasons stay empty. We do not pair different versions, calculate a year-round average or substitute official laboratory figures.
From observed battery use to billed energy
Battery kWh per mile = observed kWh/100 km × 1.609344 ÷ 100. Cost in pence per mile = battery kWh per mile × electricity price ÷ (1 − charging loss / 100).
At 0%, charging losses are excluded. Any other percentage is your assumption, not a measured charging-loss result from the driving study. For example, a 10% loss means dividing by 0.90.
Costs cover electricity only. Purchase costs, depreciation, insurance, maintenance, standing charges, subscriptions and parking or session fees are excluded.
Each published sample needs source licence evidence and attribution. A data licence permits reuse; it does not make a small or selective driving sample representative of everyone’s journeys.