mi/kWh
The EV efficiency figure shown for the GB market: miles driven per kilowatt-hour of energy. Unlike consumption figures, higher is better.
mi/kWh flips the efficiency question around: instead of asking how much energy 100 km costs, it asks how many miles one kilowatt-hour buys. That makes it the EV analog of mpg, a distance-per-energy figure where higher is better, and it is the format CarPairly shows for the GB market.
Reading it is intuitive: at 4 mi/kWh, 10 kWh of energy covers 40 miles. To turn it into money, divide your electricity price per kWh by the figure to get cost per mile.
Because it is an inverse of the consumption formats, small differences at the top end matter less than they look, and conversions are reciprocal rather than proportional. CarPairly computes mi/kWh from the stored Wh/km value for the relevant test cycle, using the formula 1000 divided by (Wh/km × 1.609344), so the UK figure always matches its metric siblings for the same cycle.
Differs by market
Shown in the GB market. It is a distance-per-energy figure, so it runs opposite to kWh/100 km: from the stored Wh/km value, mi/kWh = 1000 ÷ (Wh/km × 1.609344).