Plan smarter charging with cost breakdowns daily. Model off-peak, peak, and public prices fast. Download results, compare scenarios, and decide confidently now today.
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monthly_miles = daily_miles × days_per_monthkWh_wheels = monthly_miles ÷ miles_per_kWhkWh_wall = kWh_wheels × (100 ÷ charger_eff%)home_rate = flat_rate (or)home_rate = offpeak_rate×share + peak_rate×(1−share)EV_cost = home_kWh×home_rate + public_kWh×public_rateGas_cost = (monthly_miles ÷ MPG) × gas_pricesavings = Gas_cost − EV_costDriving 30 miles per day for 30 days creates 900 miles per month. At 3.3 miles per kWh, that needs about 273 kWh at the wheels. With 90% charging efficiency, wall energy rises to roughly 304 kWh. This step links driving habits to electricity demand and avoids underestimating costs.
If 85% of energy is charged at home, home energy is about 259 kWh and public energy about 46 kWh. Using a flat home rate of 0.18 per kWh, home charging costs near 47 per month. With a public rate of 0.45 per kWh, public charging adds about 21 per month. The mix strongly affects the blended cost.
With off-peak at 0.12, peak at 0.28, and 80% off-peak share, the blended home rate becomes about 0.152 per kWh. On the same 259 kWh, home cost drops to about 39 per month, improving savings. Moving charging to off-peak hours typically changes results more than small efficiency tweaks.
For a 28 MPG vehicle, 900 miles uses about 32.1 gallons. At 3.80 per gallon, gasoline costs about 122 per month. This baseline gives a comparable “cost to move the same miles” measure. The cost-per-mile view highlights the difference: around 0.076 for charging versus 0.136 for gasoline in the example.
Monthly savings equals gasoline cost minus total charging cost. In the example, charging near 60–68 per month yields savings around 54–62 per month, or 650–740 per year. Use the CSV export to track multiple scenarios, such as higher public charging share, lower efficiency in winter, or higher fuel prices. The chart makes tradeoffs visible instantly. A quick sensitivity check is to raise the home rate until savings reach zero; that breakeven rate helps evaluate new tariffs, solar charging, or workplace rates. for future planning.
Efficiency converts wheel energy into wall energy. Lower efficiency increases billed kWh, raising both home and public costs for the same miles.
When time-of-use is enabled, the home rate is a weighted average: off-peak rate × off-peak share plus peak rate × remaining share.
Use your typical paid average across networks. If prices vary, enter a conservative number and run a second scenario to see sensitivity.
Yes. Change MPG and fuel price to match your reference vehicle. The calculator then estimates monthly gasoline spend for the same mileage.
Real bills include taxes, demand charges, membership fees, preconditioning energy, and seasonal efficiency changes. Use the results as a planning baseline.
Adjust one factor at a time, submit, then download CSV. Save files with scenario names so you can compare tariffs, charging mixes, and fuel prices.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.