CO2 Emissions Calculator
How much CO2 does a vehicle emit? Calculate vehicle CO2 emissions from fuel consumption.
Interactive inputs
Live result
30.00
MPG
Change an input to update the diagram.
Answer first
How much CO2 does a vehicle emit?
The CO2 Emissions Calculator measures carbon dioxide output based on fuel consumption, focusing specifically on CO2 as the primary greenhouse gas from combustion engines. Use it for environmental reporting, corporate sustainability metrics, or personal carbon tracking.
Current calculator output
30.00
MPG
How it works
CO2 Emissions Calculator: inputs, formula, and result
Enter the values that describe your supporting scenario. The interactive result changes as the inputs change, helping you compare fuel efficiency, fuel consumption, fuel cost, or operating impact.
Formula
CO2 (lbs) = Fuel Used (gallons) × Emission Factor (lbs/gallon)
Worked example
120 gallons of gasoline × 19.64 lbs/gallon = 2,356.8 lbs of CO2.
Pro tip: For corporate sustainability reporting (CDP or GHG Protocol), convert to metric tons: divide pounds by 2,204.6. The example equals 1.069 metric tons.
Personalized guidance
What changes the result for CO2 Emissions?
Explore a focused fuel-economy variable and see how it changes cost, efficiency, or emissions. Traffic, tire pressure, vehicle load, terrain, driving style, weather, fuel price, and the quality of the input data can change the final result.
Estimated result condition
100%
Select factors that match this supporting calculation.
When should you use this calculator?
Use it before a trip, after a fill-up, when comparing vehicles, or when documenting business mileage. Keep the same units and use several measurements when you need an average.
Selected usePlan with CO2 Emissions Calculator
FAQ
FAQs about CO2 Emissions
3 questions
Question 1 of 3 is open
What is the CO2 emission factor for different fuels?
Gasoline: 19.64 lbs/gallon. Diesel: 22.38 lbs/gallon. E85 ethanol: 16.11 lbs/gallon. Natural gas (CNG): 14.48 lbs/gallon equivalent.
How does vehicle efficiency affect CO2 emissions?
CO2 is directly proportional to fuel consumed. A 30 MPG car emits 654 lbs per 1,000 miles. A 20 MPG car emits 982 lbs, 50% more for the same distance.
What are Scope 1, 2, and 3 emissions for vehicles?
Scope 1: direct tailpipe emissions. Scope 2: emissions from electricity for EVs. Scope 3: fuel production, vehicle manufacturing, and supply chain.
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