The Stacking Years Longevity Calculator estimates how much additional life expectancy you could gain by adopting evidence-based interventions. Select from 55 ranked interventions — including exercise, nutrition, sleep, and supplementation — and see your personalised longevity score.
Calculations incorporate baseline life expectancy, category-level diminishing returns (exercise and nutrition each have a ceiling), and an ambition multiplier based on adherence level. The model is transparent: you can see exactly how each intervention contributes to your total estimated gain.