Carbon Sequestration per Tree Species Calculator

A mature tree absorbs 20-50 lbs (9-23 kg) of CO2 annually, depending on species. Fast-growing hardwoods like poplar and eucalyptus absorb more (55-65 lbs/year), while slow-growing hardwoods like teak and mahogany absorb less (18-20 lbs/year). Over its lifetime, a single tree can absorb one ton of CO2. Oak trees sequester about 48 lbs/year for 50+ years. The best carbon sequestration strategy combines fast-growing pioneer species with long-lived climax species for both rapid and lasting storage.

Eucalyptus sequesters the most at ~65 lbs CO2 per year per tree, followed by poplar at 55 lbs. However, eucalyptus is controversial in some regions due to water consumption and fire risk. For North American native species, oak (48 lbs/yr) and redwood (50 lbs/yr) are excellent choices. Oak stores carbon in dense wood that resists decay for decades. Redwoods are among the best long-term carbon stores because they live 500+ years and accumulate massive biomass. The total carbon stored also depends on planting density, soil quality, climate, and management practices.

For a reforestation project, calculate: Total Annual Sequestration = Number of Trees × Sequestration Rate per Species × Survival Rate. A 1-acre mixed hardwood forest with 300 trees (oak, maple, birch) at 75% survival sequesters roughly 225 trees × 40 lbs CO2/tree/yr = 9,000 lbs (4.1 metric tons) of CO2 per year at maturity. Over 30 years, that is about 123 metric tons of CO2. Use species diversity: 40% fast-growing (poplar/eucalyptus for quick gains), 40% mid-rate (oak/maple for steady storage), 20% slow-growing (teak/mahogany for long-term dense wood).

Carbon sequestration is the rate of CO2 capture (lbs CO2/year), while carbon storage is the total carbon held in tree biomass over its lifetime. A fast-growing poplar sequesters 55 lbs/year but lives ~40 years, storing about 2,200 lbs. An oak sequesters 48 lbs/year but lives 50+ years, storing 2,400+ lbs. A redwood sequesters 50 lbs/year but lives 500+ years, potentially storing 25,000+ lbs. For climate goals, both rate and duration matter. Harvested wood products (lumber, furniture) continue storing carbon after the tree is cut, while the next generation of trees starts new sequestration.