Carbon Footprint & Tree Offset Calculator

See Your Carbon Footprint and What It Takes to Shrink It

Get a simple breakdown of where your emissions come from, how you compare to major benchmarks, and which changes will reduce the most CO₂ first. You will also see tree offsets, forest equivalents, and estimated offset costs, so the numbers feel real instead of abstract.

Carbon Footprint & Tree Offset Calculator

Calculate your annual carbon footprint, see how many trees it takes to offset your lifestyle, and find out what it would actually cost to go carbon neutral.

🚗 Transportation

Miles driven per yearThe average American drives about 13,500 miles/yr. Check your odometer or use your car insurance estimate.

Vehicle typeGas sedan: ~0.79 lbs CO₂/mile (28 mpg). SUV/truck: ~1.05 lbs/mile (21 mpg). Hybrid: ~0.45 lbs/mile. EV: ~0.20 lbs/mile on average US grid.

FlightsRound trip estimates including radiative forcing (the altitude effect on warming): short flight ~1,100 lbs, medium ~2,200 lbs, long-haul ~4,400 lbs CO₂.

Primary vehicle

Miles driven per year13,500 mi

Short flights per year (<3 hr each way)2

Medium flights per year (3-6 hr each way)1

Long-haul flights per year (>6 hr each way)0

🏠 Home Energy

Monthly electric billUsed to estimate kWh consumption. CO₂ is calculated at EPA's national average of 0.386 lbs per kWh. Your actual grid may be cleaner or dirtier depending on your state.

Monthly gas billNatural gas produces 11.7 lbs CO₂ per therm burned. At avg ~$1.20/therm, $100/month = ~83 therms = ~970 lbs CO₂/month.

Household occupantsHome energy emissions are divided equally among occupants. A family of 4 sharing one home has a lower per-person footprint than a single person in the same house.

Monthly electric bill$120

Monthly natural gas bill$80

Household occupants (to split home emissions)

🍕 Diet

Why diet mattersFood production accounts for ~26% of global greenhouse gas emissions. Beef alone produces ~20x more CO₂ per gram of protein than legumes. Switching from meat-heavy to plant-based is the single highest-impact personal diet change.

Estimates usedMeat-heavy: 6,600 lbs CO₂/yr. Average American: 4,400 lbs. Flexitarian: 2,600 lbs. Vegetarian: 1,800 lbs. Vegan: 1,100 lbs. Source: Our World in Data / Poore & Nemecek (2018).

Diet pattern

🛍 Shopping & Consumption

Shopping & consumption level

Your annual carbon footprint

--metric tons CO₂

calculating...

Trees to offset

mature trees (48 lbs/yr)

Forest equivalent

acres of mixed forest

vs US average

16 metric tons/person

vs world average

4.8 metric tons/person

vs Paris target

2.3 metric tons/person

Biggest category

where to focus first

Footprint breakdown by category

How you compare

You-

US average16.0t

World average4.8t

Paris target2.3t

Tree & forest equivalents

🌳

mature trees needed to offset your footprint annually

🌳

young trees planted today (takes ~10 yrs to fully offset)

🌿

acres of mixed forest equivalent

⌛

years for a 10-tree planting to fully absorb your footprint

Cost to buy carbon offsets

Budget

~$5/ton
unverified

Verified

~$15/ton
Gold Standard/VCS

Premium

~$30/ton
best-in-class

Your highest-impact changes

Methodology: Footprint estimates use EPA emission factors, IPCC guidelines, and Poore & Nemecek (2018) food system data. Tree sequestration rates from USDA Forest Service (mature tree: ~48 lbs CO₂/yr; young tree average over first 10 years: ~13 lbs/yr). Carbon offset prices reflect 2024 voluntary market ranges. All figures are estimates -- your actual footprint depends on your specific utility grid, diet composition, and local supply chains. This calculator is for educational purposes.

Carbon Footprint & Tree Offset Calculator

See Your Carbon Footprint and What It Takes to Shrink It

Carbon Footprint & Tree Offset Calculator

Explore More Calculators