Gas vs Electric Savings Calculator
Gas vs Electric Savings is evaluated from Annual Miles Driven, Gas Car MPG and Gas Price. The calculation reports Annual Gas Cost, Annual EV Electricity Cost and Annual Fuel Savings.
Results
About the Gas vs Electric Savings Calculator
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 cost = (miles/MPG) x gas price. EV cost = (miles/efficiency) x electricity rate. Annual savings = gas cost - EV cost. Break-even = price premium / annual savings.
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 cost = (miles/MPG) x gas price. EV cost = (miles/efficiency) x electricity rate. Annual savings = gas cost - EV cost. Break-even = price premium / annual savings. 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: Average American driver: 32 MPG gas vs 4 mi/kWh EV
Inputs
With Annual Miles Driven = 14,263, Gas Car MPG = 32, Gas Price = 3.5 and EV Efficiency = 4 as the stated inputs, the result is Annual Gas Cost = $1,560.02/yr, Annual EV Electricity Cost = $463.55/yr and Annual Fuel Savings = $1,096.47/yr. Each value corresponds to the declared output fields.
Example 2: High mileage driver: 20,000 miles/year
Inputs
With Annual Miles Driven = 20,000, Gas Car MPG = 28, Gas Price = 3.75 and EV Efficiency = 3.8 as the stated inputs, the result is Annual Gas Cost = $2,678.57/yr, Annual EV Electricity Cost = $631.58/yr and Annual Fuel Savings = $2,046.99/yr. Each value corresponds to the declared output fields.
Example 3: Low electricity rate (solar home): $0.05/kWh
Inputs
With Annual Miles Driven = 12,000, Gas Car MPG = 35, Gas Price = 3.5 and EV Efficiency = 4 as the stated inputs, the result is Annual Gas Cost = $1,200/yr, Annual EV Electricity Cost = $150/yr and Annual Fuel Savings = $1,050/yr. Each value corresponds to the declared output fields.
Example 4: Truck comparison: gas pickup vs electric pickup
Inputs
With Annual Miles Driven = 15,000, Gas Car MPG = 18, Gas Price = 3.6 and EV Efficiency = 2.5 as the stated inputs, the result is Annual Gas Cost = $3,000/yr, Annual EV Electricity Cost = $840/yr and Annual Fuel Savings = $2,160/yr. Each value corresponds to the declared output fields.
Common Use Cases
- Compare lifetime cost of gas vs electric car
- Calculate EV break-even point vs gas car
- Estimate annual fuel savings from switching to electric