Electric Car Charging Cost Calculator
Use our free electric car charging cost calculator to quickly estimate charging costs per charge, cost per km/mile, and monthly or annual charging spend, based on key inputs like battery size, charge level, electricity rate, and charger efficiency. Perfect for EV owners, fleet managers, and drivers planning trips or budgets.
Electric Car Charging Cost Formula
Knowing the true charging cost helps you compare home vs public charging, plan trip budgets, and calculate running cost per km—vital for personal budgeting or fleet management. Plug your numbers into the calculator for instant, data-driven estimates.
How this electric car charging cost calculator works
This calculator estimates the electricity you must draw from the grid to raise your battery from the current charge to your target charge (it adjusts for charger/charging losses). It multiplies the grid energy by your electricity rate, adds any session fees or surcharges, and divides by the distance added to give a per-km cost if you provide vehicle efficiency or range.
When to use this electric car charging cost calculator
To compare home charging vs public fast-charger costs
When planning long trips to estimate charging stops and costs
For fleet budgeting and calculating per-vehicle operating costs
To evaluate solar + home charging economics (use solar offset input)
To decide whether off-peak charging or subscription chargers make sense
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Average EV Charging Benchmarks
Understand how your results compare to typical EV numbers. Use these as starting points and replace with local rates for accuracy.
Typical consumption
Typical residential electricity rates
Typical cost per 100 km
Typical cost per km
These benchmarks help EV owners and fleet managers quickly check whether their per-charge and per-km figures look reasonable given local electricity prices and vehicle efficiency.
Frequently Asked Questions
It provides estimates based on your inputs and typical charging losses. Actual costs depend on local rates, charger fees, and driving conditions.
Use charger efficiency to account for losses during charging (90-95% typical). Use vehicle efficiency (kWh/100 km) to estimate cost per km or added range.
Usually yes—home (overnight) charging tends to be significantly cheaper per kWh than public fast chargers, which often include higher rates or session fees.
Fast chargers deliver energy faster and may have slightly higher losses; they also commonly charge higher per-kWh rates and session fees.
Yes—use the Solar offset (%) input to reduce the effective electricity drawn from the grid.
Provide average daily distance or charges per week; the calculator multiplies per-charge costs to produce monthly/annual estimates.
Battery degradation affects usable capacity and range over time. If usable capacity falls, cost per km can rise—adjust battery capacity or efficiency to model this.
Yes—calculate charging cost per km and compare it to your fuel vehicle's cost per km (fuel price and fuel efficiency) to see savings.