Carbon Emissions Calculator
How much carbon does a trip produce? Estimate carbon output from fuel volume and distance.
Interactive inputs
Live result
30.00
MPG
Change an input to update the diagram.
Answer first
How much carbon does a trip produce?
The Carbon Emissions Calculator estimates the total CO2 output from burning a given amount of fuel. Enter gallons consumed and the CO2 emission factor to see your trip's carbon footprint. This helps environmentally conscious drivers quantify their impact and set reduction targets.
Current calculator output
30.00
MPG
How it works
Carbon 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 Emissions (lbs) = Fuel Used (gallons) × CO2 per Gallon (lbs)
Worked example
Burning 120 gallons of gasoline produces 120 × 19.64 = 2,356.8 lbs of CO2.
Pro tip: One gallon of gasoline produces about 19.64 lbs of CO2 while one gallon of diesel produces about 22.38 lbs. Despite better MPG, diesel emits more CO2 per gallon.
Personalized guidance
What changes the result for Carbon 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 Carbon Emissions Calculator
FAQ
FAQs about Carbon Emissions
3 questions
Question 1 of 3 is open
How much CO2 does the average car emit per year?
The average US car driving 12,000 miles/year at 25 MPG emits about 9,427 lbs (4.28 metric tons) of CO2 per year, equivalent to 5 acres of forest absorption.
How can I offset my driving carbon emissions?
Purchase verified carbon offsets at approximately $10-$15 per metric ton. For the average car emitting 4.3 tons/year, offsetting costs about $43-$65 annually.
Do electric vehicles produce zero emissions?
EVs produce zero tailpipe emissions, but electricity generation may produce emissions. In the US, an EV effectively emits 60-70% less CO2 per mile than a gas car on average.
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