EV vs Gas Savings Calculator

EV vs Gas Savings is evaluated from Miles Driven per Year, Gas Car MPG and Gas Price. The calculation reports Gas Car Annual Fuel, EV Annual Fuel and Annual Fuel Savings.

Results

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About the EV vs Gas Savings Calculator

EV vs Gas Savings is treated here as a quantitative relation between Miles Driven per Year, Gas Car MPG, Gas Price and EV Efficiency and Gas Car Annual Fuel, EV Annual Fuel, Annual Fuel Savings and Break-Even.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
Gas annual fuel = (miles/year / MPG) x gas price/gallon
EV annual fuel = miles/year x kWh per mile x electricity price/kWh
Annual savings = gas fuel cost - EV fuel cost
Break-even years = EV price premium / annual fuel savings
Note: break-even is fuel savings only. Add $300 - $600/year maintenance savings for full TCO calculation.

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

Gas annual fuel = (miles/year / MPG) x gas price/gallon
EV annual fuel = miles/year x kWh per mile x electricity price/kWh
Annual savings = gas fuel cost - EV fuel cost
Break-even years = EV price premium / annual fuel savings
Note: break-even is fuel savings only. Add $300 - $600/year maintenance savings for full TCO calculation.

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Tesla Model 3 vs Toyota Camry: 15,000 mi/yr, $3.50 gas, $0.13 elec

Inputs

miles_year: 15000 gas_mpg: 32 gas_price: 3.5 kwh_per_mile: 0.25 elec_price: 0.13 ev_premium: 5000
Gas Car Annual Fuel: $1,641/yr. EV Annual Fuel: $488/yr. Annual Fuel Savings: $1,153/yr. Break-Even: 4.3 years

With Miles Driven per Year = 15,000, Gas Car MPG = 32, Gas Price = 3.5 and EV Efficiency = 0.25 as the stated inputs, the result is Gas Car Annual Fuel = $1,641/yr, EV Annual Fuel = $488/yr and Annual Fuel Savings = $1,153/yr. Each value corresponds to the declared output fields.

Example 2: Ford F-150 Lightning vs F-150 gas: 20,000 mi/yr, $3.60/gal, $0.12/kWh

Inputs

miles_year: 20000 gas_mpg: 20 gas_price: 3.6 kwh_per_mile: 0.44 elec_price: 0.12 ev_premium: 15000
Gas Car Annual Fuel: $3,600/yr. EV Annual Fuel: $1,056/yr. Annual Fuel Savings: $2,544/yr. Break-Even: 5.9 years

With Miles Driven per Year = 20,000, Gas Car MPG = 20, Gas Price = 3.6 and EV Efficiency = 0.44 as the stated inputs, the result is Gas Car Annual Fuel = $3,600/yr, EV Annual Fuel = $1,056/yr and Annual Fuel Savings = $2,544/yr. Each value corresponds to the declared output fields.

Example 3: Chevy Bolt vs Honda Civic: California driver, 12,000 mi/yr, $4.50 gas, $0.25 elec

Inputs

miles_year: 12000 gas_mpg: 36 gas_price: 4.5 kwh_per_mile: 0.28 elec_price: 0.25 ev_premium: 2000
Gas Car Annual Fuel: $1,500/yr. EV Annual Fuel: $840/yr. Annual Fuel Savings: $660/yr. Break-Even: 3 years

With Miles Driven per Year = 12,000, Gas Car MPG = 36, Gas Price = 4.5 and EV Efficiency = 0.28 as the stated inputs, the result is Gas Car Annual Fuel = $1,500/yr, EV Annual Fuel = $840/yr and Annual Fuel Savings = $660/yr. Each value corresponds to the declared output fields.

Example 4: Rivian R1T electric truck vs RAM 1500: 18,000 mi/yr, $3.40/gal, $0.13/kWh, $25,000 premium

Inputs

miles_year: 18000 gas_mpg: 16 gas_price: 3.4 kwh_per_mile: 0.48 elec_price: 0.13 ev_premium: 25000
Gas Car Annual Fuel: $3,825/yr. EV Annual Fuel: $1,123/yr. Annual Fuel Savings: $2,702/yr. Break-Even: 9.3 years

With Miles Driven per Year = 18,000, Gas Car MPG = 16, Gas Price = 3.4 and EV Efficiency = 0.48 as the stated inputs, the result is Gas Car Annual Fuel = $3,825/yr, EV Annual Fuel = $1,123/yr and Annual Fuel Savings = $2,702/yr. Each value corresponds to the declared output fields.

Common Use Cases

  • Compare annual fuel cost of EV vs. gas car
  • Calculate break-even years for buying an EV
  • Estimate lifetime savings of switching to electric