Tree Carbon Calculator
Total CO2 Absorbed
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CO2 Per Tree Per Year
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Equivalent Car Miles Offset
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Equivalent Flights Offset
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How Trees Absorb Carbon Dioxide
Trees absorb CO2 through photosynthesis, converting it into carbon stored in wood, leaves, and roots while releasing oxygen. A mature deciduous tree absorbs approximately 48 pounds of CO2 per year. Over its lifetime, a single tree can absorb over one ton of CO2.
Carbon absorption rates vary by species, age, and growing conditions. Fast-growing tropical trees absorb more CO2 per year but have shorter lifespans. Conifers absorb less per year but are evergreen, photosynthesizing year-round. Seedlings absorb relatively little CO2 initially but their rate increases as they grow larger.
For context, the average American generates about 36,000 pounds of CO2 per year. Planting 15-20 mature trees can offset roughly one ton of CO2 annually — a small fraction of individual emissions but a meaningful contribution when combined with other reduction strategies. Trees also provide cooling shade, air purification, habitat, and stormwater management.
Frequently Asked Questions
How much CO2 does one tree absorb?
A mature deciduous tree absorbs approximately 48 pounds (22 kg) of CO2 per year. Over a 40-year lifetime, it can sequester about 1 ton of CO2. Fast-growing species absorb more, while small fruit trees absorb less.
How many trees offset one person carbon footprint?
The average American produces about 16 metric tons of CO2 per year. You would need approximately 725 mature trees to fully offset one persons annual emissions. Trees are part of the solution but cannot be the only strategy.
Which trees absorb the most carbon?
Fast-growing hardwoods like oak, maple, and London plane trees are among the best carbon absorbers in temperate climates. Tropical species like teak and mahogany absorb even more. Native species adapted to your climate are generally the best choice.
Do dead trees release carbon?
Yes, when trees die and decompose, they gradually release stored carbon back into the atmosphere. Harvesting wood for long-lasting products (lumber, furniture) keeps carbon sequestered. Burning wood releases carbon immediately.