Tree Carbon Sequestration Calculator

Trees absorb CO₂ from the atmosphere and lock carbon in their wood — the Tree Carbon Sequestration Calculator estimates exactly how much a tree contributes based on its size and species. Select your tree species, then enter its age, diameter at breast height (DBH), height, and number of trees to see the annual CO₂ absorbed. Secondary outputs include lifetime CO₂ absorbed, carbon stored, and total annual CO₂ for all trees combined.

years
inches

Measure at 4.5 feet from ground level

feet

Calculate for multiple trees of the same type

Results

Annual CO₂ Absorbed

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Lifetime CO₂ Absorbed

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Carbon Stored

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Total Annual CO₂ (All Trees)

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Frequently Asked Questions

How much carbon does a tree sequester?

A mature tree typically absorbs 48 pounds of CO₂ per year, though this varies significantly by species, age, and size. Fast-growing trees like Douglas Fir can absorb more, while slower-growing hardwoods may absorb less but store carbon for longer periods.

What does the Tree Carbon Calculator actually measure?

The calculator estimates the amount of atmospheric CO₂ a tree removes and converts to biomass (wood, leaves, roots). It calculates both annual absorption rates and total lifetime carbon sequestration based on the tree's current size and expected growth.

How is tree carbon sequestration calculated in this tool?

The calculation uses established forestry formulas that factor in tree species, diameter at breast height (DBH), height, and age. These measurements help estimate total biomass, which is then converted to CO₂ equivalents using standard carbon conversion factors.

Why do different tree species store different amounts of carbon?

Tree species vary in growth rates, wood density, and mature size. Dense hardwoods like oak store more carbon per unit volume but grow slowly, while fast-growing softwoods like pine absorb CO₂ quickly but may have lower overall density.

How does tree age affect annual CO₂ capture?

Young trees typically absorb CO₂ at increasing rates as they establish and grow rapidly. Middle-aged trees often have peak absorption rates, while very old trees may slow their CO₂ uptake but continue storing the carbon they've already captured.

Can I use this calculator to estimate carbon for a tree plantation or forest?

Yes, enter the number of trees in the quantity field. However, this calculator works best for individual trees or small uniform plantings. Large forests with diverse species and ages require more complex modeling tools.

Is this calculator suitable for carbon credit or offset projects?

This calculator provides estimates for educational and planning purposes. Official carbon credit projects require verified methodologies, third-party monitoring, and accounting for factors like soil carbon, mortality rates, and permanence that this tool doesn't include.

Does the calculator include soil carbon and below-ground ecosystem storage?

No, this calculator focuses only on above-ground biomass (trunk, branches, leaves). Complete forest carbon accounting would also include root biomass, soil organic carbon, and understory vegetation, which can represent 20-50% of total forest carbon storage.