Car Emissions Calculator

Car Emissions is evaluated from Miles Driven per Year, Fuel Economy and Fuel Type. The calculation reports Annual CO₂ Emissions, Estimated Annual Fuel Cost and vs. Average EV on US Grid.

Results

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About the Car Emissions Calculator

Car Emissions is treated here as a quantitative relation between Miles Driven per Year, Fuel Economy, Fuel Type and Grid Emission Factor and Annual CO₂ Emissions, Estimated Annual Fuel Cost, vs. Average EV on US Grid and CO₂ Saved by Going to 40 MPG.

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/diesel: CO₂ = (miles / MPG) x emission factor / 1000
EV: CO₂ = miles / 3.5 kWh/mile x grid emission factor / 1000
Fuel cost: gas = (miles / MPG) x $3.50; EV = miles x $0.04

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/diesel: CO₂ = (miles / MPG) x emission factor / 1000
EV: CO₂ = miles / 3.5 kWh/mile x grid emission factor / 1000
Fuel cost: gas = (miles / MPG) x $3.50; EV = miles x $0.04

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: 12,000 miles, 28 MPG gasoline

Inputs

annual_miles: 12000 mpg: 28 fuel_type: gasoline grid_factor: 0.386
Annual CO₂ Emissions: 3.81 metric tons. Estimated Annual Fuel Cost: $1,500. vs. Average EV on US Grid: EV on US avg grid: 1.32 tons - saves 2.49 tons/yr. CO₂ Saved by Going to 40 MPG: 1.14 tons/yr

With Miles Driven per Year = 12,000, Fuel Economy = 28, Fuel Type = gasoline and Grid Emission Factor = 0.386 as the stated inputs, the result is Annual CO₂ Emissions = 3.81 metric tons, Estimated Annual Fuel Cost = $1,500 and vs. Average EV on US Grid = EV on US avg grid: 1.32 tons - saves 2.49 tons/yr. Each value corresponds to the declared output fields.

Example 2: Large SUV: 15,000 miles/yr, 18 MPG gasoline

Inputs

annual_miles: 15000 mpg: 18 fuel_type: gasoline grid_factor: 0.386
Annual CO₂ Emissions: 7.41 metric tons. Estimated Annual Fuel Cost: $2,917. vs. Average EV on US Grid: EV on US avg grid: 1.65 tons - saves 5.75 tons/yr. CO₂ Saved by Going to 40 MPG: 4.07 tons/yr

With Miles Driven per Year = 15,000, Fuel Economy = 18, Fuel Type = gasoline and Grid Emission Factor = 0.386 as the stated inputs, the result is Annual CO₂ Emissions = 7.41 metric tons, Estimated Annual Fuel Cost = $2,917 and vs. Average EV on US Grid = EV on US avg grid: 1.65 tons - saves 5.75 tons/yr. Each value corresponds to the declared output fields.

Example 3: EV owner: 12,000 miles, California grid

Inputs

annual_miles: 12000 mpg: 100 fuel_type: ev grid_factor: 0.110
Annual CO₂ Emissions: 0.38 metric tons. Estimated Annual Fuel Cost: $480. vs. Average EV on US Grid: This vehicle is already cleaner than average EV on US grid. CO₂ Saved by Going to 40 MPG: 0 tons/yr

With Miles Driven per Year = 12,000, Fuel Economy = 100, Fuel Type = ev and Grid Emission Factor = 0.11 as the stated inputs, the result is Annual CO₂ Emissions = 0.38 metric tons, Estimated Annual Fuel Cost = $480 and vs. Average EV on US Grid = This vehicle is already cleaner than average EV on US grid. Each value corresponds to the declared output fields.

Example 4: Commuter upgrade decision: current 20 MPG truck vs. 40 MPG hybrid

Inputs

annual_miles: 15000 mpg: 20 fuel_type: gasoline grid_factor: 0.386
Annual CO₂ Emissions: 6.67 metric tons. Estimated Annual Fuel Cost: $2,625. vs. Average EV on US Grid: EV on US avg grid: 1.65 tons - saves 5.01 tons/yr. CO₂ Saved by Going to 40 MPG: 3.33 tons/yr

With Miles Driven per Year = 15,000, Fuel Economy = 20, Fuel Type = gasoline and Grid Emission Factor = 0.386 as the stated inputs, the result is Annual CO₂ Emissions = 6.67 metric tons, Estimated Annual Fuel Cost = $2,625 and vs. Average EV on US Grid = EV on US avg grid: 1.65 tons - saves 5.01 tons/yr. Each value corresponds to the declared output fields.

Common Use Cases

  • Calculate annual CO2 emissions from a vehicle
  • Compare gas car to electric vehicle emissions
  • Estimate carbon savings from upgrading to a fuel-efficient vehicle