EV planning
EV Savings Calculator
Compare electric vehicle charging costs against gasoline fuel expenses for the same annual driving mileage, and calculate your annual electricity and fuel cost savings.
Compare EV and fuel costs
How to Calculate EV vs Gas Vehicle Savings
- Enter Annual Driving Distance: Input yearly miles or kilometers (US average is ~12,000–14,000 miles/yr).
- Enter Gasoline Vehicle Specs: Input current car fuel economy (MPG or L/100km) and local pump gas price ($/gal).
- Enter EV Battery Consumption & Power Price: Input vehicle economy (mi/kWh, kWh/100mi, or kWh/100km) and electricity rate ($/kWh).
- Review Total Savings: Compare annual operating fuel bills, cost per mile, and energy differentials.
US-Dollar Reference Scenario: Annual Fuel & Energy Cost Savings
Illustrative reference scenario assuming $3.50/gal gasoline, $0.16/kWh electricity, 28 MPG combustion efficiency, 3.5 mi/kWh battery-side EV consumption, and 90% grid-to-battery charging efficiency. These values are illustrative rather than universal market prices:
| Annual Driving Distance | Gasoline Car Cost (@ $3.50/gal) | EV Electricity Cost (@ $0.16/kWh) | Net Annual Fuel Savings |
|---|---|---|---|
| 8,000 miles/yr (~12,875 km) | $1,000 / yr | ~$406 / yr | +$594 / yr |
| 12,000 miles/yr (~19,312 km) | $1,500 / yr | ~$610 / yr | +$890 / yr |
| 15,000 miles/yr (~24,140 km) | $1,875 / yr | ~$762 / yr | +$1,113 / yr |
| 20,000 miles/yr (~32,187 km) | $2,500 / yr | ~$1,016 / yr | +$1,484 / yr |
EV vs Gas Operating Cost & Savings Formulas
Calculates the annual electricity and gasoline cost differential between an electric vehicle and an internal combustion engine vehicle over the exact same annual mileage.
Variable Definitions
Annual_DistanceAnnual Travel Distance(mi/yr or km/yr)- Total miles or kilometers driven per year.
mi_per_kWhEV Battery Consumption(mi/kWh)- Battery-side vehicle energy economy before charging losses.
Charging_EfficiencyCharging Efficiency(fraction)- Grid-to-battery charging efficiency (typically 85%–95%, default 90%).
Electricity_RateElectricity Price(currency/kWh)- Electricity rate per kilowatt-hour purchased from the grid.
MPGGas Car Fuel Economy(MPG)- Fuel economy of the comparable combustion vehicle.
Fuel_PriceGasoline / Diesel Price(currency/gal)- Price per gallon or liter ($/gal, €/L, £/L).
Calculation Notes
- Annual Energy/Fuel Savings = Gas_Annual_Cost − EV_Annual_Cost.
- When maintenance inputs are provided: Net Annual Savings = Annual Energy/Fuel Savings + (Gas Maintenance − EV Maintenance).
- Grid electricity consumption accounts for charging losses between wall power and battery storage: Grid_kWh = Battery_kWh ÷ Charging_Efficiency.
Technical References & Model Basis
Calculations are derived from deterministic energy conversion physics and empirical automotive operating cost benchmarks:
DOE Alternative Fuels Data Center
U.S. Department of Energy (AFDC) fuel property comparisons, gasoline gallon equivalent (GGE) metrics, and residential Level 2 charging efficiency benchmarks.
EPA Fuel Economy Guide
Environmental Protection Agency (EPA) vehicle dynamometer testing procedures, window-sticker fuel economy ratings, and standardized electrical consumption metrics.
AAA Driving Costs Benchmarks
American Automobile Association (AAA) annual “Your Driving Costs” empirical studies detailing fuel, electricity, and preventative maintenance differentials.
PowerLab Deterministic Engine
Pure client-side mathematical evaluation applying AC charging efficiency divisor exactly once with zero hidden assumptions or invented multi-year financial figures.