Life Progress Calculator

In 2026, a 34-year-old design director in Lisbon opens a new tab between Figma reviews and a passport renewal email and asks herself the only question that matters about a Wednesday: how much of her life has she already lived? The Life Progress calculator turns that question into a single horizontal bar. The bar runs from zero to her chosen expectancy, five stage segments colour the bar, milestone ticks mark the standard human waypoints, and a single percentage chip tells her she is 38% of the way through a default 90-year arc. The bar is intentionally not a week-grid like Tim Urban's Your Life in Weeks — that grid is a memento mori; this bar is a stage-aware compass.

The numerical raw material is the WHO Global Health Observatory life expectancy at birth: 73.4 years globally in 2023, 80.7 in the UK, 79.3 in the United States, 84.4 in Japan, and 70.8 in India. The WHO further publishes Healthy Life Expectancy (HALE), which subtracts years of moderate-to-severe disability and lands roughly 9-10 years below the headline figure for most high-income countries. The tool exposes a slider from 70 to 100 so the user can pick the figure they consider personally honest — period life expectancy (cohort assumption frozen at today's rates), cohort life expectancy (assumes future mortality improvements), HALE, or family-history adjusted.

Life-stage segmentation has multiple traditions. Erik Erikson's eight psychosocial stages (1950, 1968) frame the journey as trust vs mistrust, autonomy vs shame, initiative vs guilt, industry vs inferiority, identity vs role confusion, intimacy vs isolation, generativity vs stagnation, and integrity vs despair. Daniel Levinson's Seasons of a Man's Life (1978) used five eras of about 25 years each. Bernice Neugarten distinguished the young-old (55-75) from the old-old (75+). This tool uses a five-segment childhood / adolescence / early adulthood / midlife / late life model that maps directly to the bar's coloured bands.

The percentage of life lived is a deceptively simple equation: percent = (age in years) / (life expectancy) × 100. It hides three subtleties. First, expectancy is conditional — once you have reached age 65 the WHO conditional life expectancy at 65 is about 82-87 in high-income countries, meaningfully higher than expectancy at birth. Second, expectancy is shifting upward by about 0.2 to 0.3 years per calendar year in OECD data (with a temporary 2020-2021 COVID-19 dip), so a 30-year-old today is likely to outlive WHO 2023 figures. Third, individual variance is huge — the standard deviation of age at death in a high-income country is roughly 13 years.

Tim Urban's Wait But Why article Your Life in Weeks (2014) lit a fire under the mortality-perspective genre and inspired countless visual tools. Oliver Burkeman's Four Thousand Weeks (2021) turned the concept into a New York Times bestseller about time management. The Stoic memento mori tradition (Marcus Aurelius, Meditations, c. 180 CE; Seneca's De Brevitate Vitae, 49 CE) sits in the same lineage. The Life Progress bar is in the same intellectual family but is deliberately linear and stage-aware rather than week-grained — it is a planning compass, not a memento.

The practical use of the tool is straightforward. A user in their twenties may set expectancy to 95 to optimise for long-horizon decisions (retirement saving, career investment). A user in their seventies may set expectancy to their family-history maximum to plan estate logistics. Health economists Sir Michael Marmot (Whitehall studies) and David Cutler (Harvard) have published extensively on the social gradient of life expectancy and the role of education, income, and behaviour. The slider acknowledges those distributions. The bar acknowledges the stages. The milestones acknowledge the social contract. The percentage chip is the headline.

Time-perspective theory (Zimbardo and Boyd, 1999) divides individuals into past-positive, past-negative, present-hedonistic, present-fatalistic, and future orientations. A bar like this nudges past-fatalistic individuals toward future orientation by making the remaining proportion visible. The Stanford Marshmallow experiment (Mischel, 1972) demonstrated the long-tail consequences of present-bias; tools that visualise time horizons have been shown to reduce present-bias in financial decision-making (Hershfield et al., 2011, age-progressed avatars). Life Progress is in that lineage — a planning surface, not a clock, and certainly not a doomsday counter.