EV Calculators & Tools
Know the numbers before you charge, buy, or switch.
Four quick tools that answer the questions every EV owner asks. Enter your figures — everything updates instantly, and nothing leaves your browser.
Battery capacitymost EVs 60–100
kWh
Charge windowfrom → to
%
→%
Electricity priceyour kWh rate
$/kWh
Charging efficiencyAC loss ~10%
%
Cost to charge$0.00
20 → 80%
Energy added0 kWh
Cost per 1%$0.00
Charging at home is typically 4–6× cheaper than public DC fast charging.
Annual milesUS avg ≈ 12,000
mi
EV efficiencytypical 3–4
mi/kWh
Electricity price
$/kWh
Gas car economy
MPG
Gas price
$/gal
You save every year$0
Cost per mile$0.00
Over 5 years$0
Fuel only — EVs also save on oil changes, brakes and routine service.
Battery capacity
kWh
Efficiencyrated mi/kWh
mi/kWh
State of charge
%
Driving conditionsaffects range
Estimated range0mi
100%
Usable energy0 kWh
Metric0 km
Real range drops in the cold because cabin heating draws from the same battery.
Annual EV miles
mi
EV efficiency
mi/kWh
Peak sun hoursdaily, your area
h/day
Panel wattagemodern 400–450
W
Panels to power your EV0panels
System size0 kW
Generates / year0 kWh
Covers EV charging only. Add household usage for a full rooftop estimate.
Estimates for guidance only. Actual figures vary with driving style, terrain, temperature, and local energy tariffs.