Quiz
How Much Do You Know About Carbon Footprints?
Eight questions on emissions, trees and offsets.
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Carbon Footprint and Tree Offset
Estimate your annual carbon footprint, see how many trees it equals and find out what it would cost to offset it.
Questions this answers
- What is my carbon footprint per year?
- How many trees would it take to offset my emissions?
- Which habits cut my footprint the most?
- How does my footprint compare with the U.S. average?
- How much would offsetting cost?
🚗 Transportation
Primary vehicle / commute
🏠 Home Energy
Electric grid mix (state-level)
Household occupants
🍕 Diet
Diet pattern
🛍 Shopping & Consumption
Shopping level
🐶 Pets
💰 Household income (for comparison)
Household income (for benchmark only)
Your annual carbon footprint
--metric tons CO₂
calculating...
Mature-tree equivalent
annual sequestration (48 lbs/yr each)
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Forest equivalent
acres of avg managed US forest
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vs US average
16 metric tons/person
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vs your income bracket
avg for $50k-$100k
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vs Paris target
2.3 metric tons/person by 2030
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Biggest reducible category
where to focus first
-
Footprint breakdown by category
That's the equivalent of...
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miles of driving (gas car)
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round-trip NYC–London flights
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mature trees absorbing for a year
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average US homes' annual energy
How you compare
Tree & forest sequestration equivalents
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mature trees -- equivalent annual sequestration
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acres of average managed US forest
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young trees planted today (~13 lbs/yr each)
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years for 10 mature trees to absorb 1 yr of your footprint
Cost to buy carbon offsets (2026 market)
Basic avoidance
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~$10/ton
cheaper credits, lower assurance
cheaper credits, lower assurance
Verified offsets
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~$25/ton
Gold Standard / VCS
Gold Standard / VCS
Carbon removals
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~$100/ton
DAC, biochar, enhanced weathering
DAC, biochar, enhanced weathering
Your highest-impact changes
This calculator is for educational and informational purposes only. Results are estimates based on EPA emission factors, IPCC guidelines, USDA Forest Service sequestration rates, and Poore & Nemecek (2018) food system data. Your actual footprint depends on your specific utility grid, diet composition, and local supply chains. Always consult qualified experts for decisions involving carbon accounting, climate strategy, or offset purchases.
Companion pieces
Go deeper on Carbon Footprint and Tree Offsets
Quizzes, guides and answers built to go with this calculator.
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Frequently asked questions
How is my carbon footprint estimated?
The calculator multiplies your driving, flights, home electricity, heating fuel and diet by published emission factors and adds them up in tons of carbon dioxide per year. It is an estimate for planning, not an audit, so the biggest value is seeing which part of your life drives most of the total.
How many trees does it take to offset one ton of CO2?
A young tree absorbs only a small amount of carbon each year, often in the range of 10 to 25 kilograms, so offsetting one metric ton can take roughly 40 to 100 trees growing for a year. The calculator uses a fixed average per tree, and real absorption varies with species, climate and age.
What is the average American carbon footprint?
Estimates for the United States are usually around 14 to 16 metric tons of CO2 per person per year, among the highest in the world. Transportation and home energy make up the largest shares for most households.
Which changes cut emissions the most?
For most people the largest cuts come from driving less or switching to a more efficient or electric car, taking fewer flights, improving home heating and cooling, and moving to cleaner electricity. Diet changes help too, but usually less than transport and home energy.
Are carbon offsets worth buying?
Some are, but quality varies a lot. Look for projects verified by a recognized standard that would not have happened without the funding. Reducing your own emissions first is more reliable, and offsets are best used for what you cannot cut.
Quick check
Test what you know
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