Deforestation Impact Calculator

When forest is cleared, the carbon stored in biomass (trees, roots, undergrowth) is released as CO₂ through burning, decomposition, or decay. The calculation multiplies forest area by the carbon density for that forest type (tonnes of carbon per hectare), then converts carbon to CO₂ by multiplying by 3.67 (the molecular weight ratio of CO₂ to C). Tropical rainforests store the most carbon — up to 250–300 tonnes C/ha — while boreal forests typically store 60–100 tonnes C/ha.

Ecosystem services are the benefits forests provide to people and the planet for free — including carbon sequestration, water filtration, flood regulation, soil stabilisation, pollination, and climate regulation. Economists assign monetary values to these services to make the true cost of deforestation visible in policy and legal decisions. Values are based on peer-reviewed studies and typically range from $1,000 to $10,000+ per hectare per year depending on forest type.

This calculator estimates species at risk using the species-area relationship (SAR), a well-established ecological principle that larger forest areas support exponentially more species. When forest is cleared, species dependent on interior habitat lose their range. Tropical regions like the Amazon and Congo Basin have the highest biodiversity density, so the same area cleared there puts far more species at risk than in temperate or boreal zones.

Restoration costs cover reforestation (seedling production, planting labour), soil rehabilitation, invasive species removal, ongoing monitoring, and community engagement over the restoration period. These costs are applied in full when deforestation is illegal, as courts and compensation frameworks require full ecological restoration. For legal clearing, restoration costs represent voluntary rehabilitation expenses.

Different forest types have vastly different carbon densities, biodiversity richness, and ecosystem service values. Tropical rainforests are the most carbon-dense and species-rich biomes on Earth, while temperate and boreal forests, though still ecologically important, store less carbon per hectare and support fewer species. Mangroves are exceptional — they store up to 4× more carbon per hectare than tropical upland forests when soil carbon is included.

The carbon offset cost shows how much it would cost to compensate for the CO₂ released by purchasing equivalent carbon credits on the voluntary carbon market, estimated here at $15 per tonne of CO₂ — a widely cited mid-range price. This helps frame deforestation in terms of climate finance and the cost of mitigation, relevant for corporate net-zero commitments, legal proceedings, and conservation investment planning.

This tool provides indicative estimates based on published scientific averages and is suitable for educational use, conservation planning, and policy discussion. For formal legal proceedings, regulatory compliance, or compensation claims, site-specific ecological assessments conducted by qualified professionals are required. The methodology aligns with approaches used by organisations like Conservation Strategy Fund and the FABLE Consortium.

Forest recovery timelines vary enormously. Early pioneer species may return within 10–15 years, but full structural and biodiversity recovery of a tropical rainforest can take 100–200 years — and some ecosystem functions, like old-growth carbon stocks, may never fully recover. The restoration timeframe you select affects cost estimates, as longer recovery periods require more sustained management investment.