Calculate and compare the cost of an EV journey using home, workplace or public charging — and see how it compares to a petrol equivalent.
1 Journey details
100 miles
mi/kWh
Real-world: 3.0–4.5 typical. Check your car's trip computer.
kWh
Usable battery size — check your car's spec sheet.
%
State of charge at start of journey.
Cold weather efficiency penalty
Applies a ~20% range reduction for winter driving (below 5°C)
2 Charging method
p/kWh
Ofgem avg April 2026. Check your tariff — EV overnight rates can be 7–10p.
£
Some public networks charge a connection fee per session.
%
AC home chargers lose ~10%. DC rapid chargers 8–12%.
3 Compare to petrol
p/litre
RAC/Brumble March 2026 avg.
mpg
Real-world MPG of the equivalent petrol car.
Your journey cost estimate
EV journey cost
£0.00
for 100 miles
Cost per mile
0p
pence per mile
Energy needed
0 kWh
from the grid
❄️ Cold weather penalty applied — efficiency reduced by 20%. Real-world winter range is significantly lower than quoted figures.
EV vs petrol comparison
⚡ EV (home charging)£0.00
⛽ Petrol equivalent£0.00
Saving £0.00 vs petrol
Journey breakdown
Journey distance–
EV real-world efficiency–
Energy consumed (vehicle)–
Grid energy drawn (inc. charger loss)–
Electricity rate–
Session fee–
Total EV cost–
Range & charge stop planner
Available range at start–
Journey distance–
Range remaining at destination–
Charge stops needed–
Data sources: Electricity rate Ofgem avg April 2026 (24.5p/kWh). Petrol 134p/litre (RAC/Brumble March 2026). EV efficiency based on real-world mi/kWh. Cold weather penalty derived from AAA/Geotab real-world winter range studies (~20% reduction below 5°C). Charger efficiency losses estimated from IEA/EVSE data. All figures are estimates — actual costs vary by vehicle, driving style, network tariff and conditions.