Extinction Debt Calculator

Estimate extinction debt and future species losses following habitat destruction.

Historical & Current Data

Original Species Count

Current Species Count

Original Habitat (ha)

Current Habitat (ha)

Z-Value (species-area slope)

Relaxation Time (years)

Years Since Habitat Loss

Low Debt

Species Committed

Expected at Equilibrium

Habitat Lost70.0%

Species Already Lost25

Total Expected Losses31

Extinction Debt6.2 species

Extinctions Realized80.2%

Half-life of Debt34.7 years

Time to 95% Payment149.8 years

Annual Extinction Rate0.12 sp/yr

Debt Remaining19.8%