Days left on Earth
A whole human life is a surprisingly small, countable number of weeks. Enter your date of birth and a life expectancy, and see how much of it has gone by — in days, weeks, and summers — and how much, on that estimate, is left. The grid below draws your life one square at a time: each square is a single week, each row about a year. Nobody knows their real number; this is a nudge, not a prediction. Everything runs in your browser; nothing is uploaded.
— weeks left
Your life in weeks — one square per week, ~52 to a row (a year). The filled squares are gone; the empty ones are what the estimate leaves you.
How it works
Days lived is just today minus your birthday in whole days. A life of the expectancy you set is taken as that many years × 365.25 days (the quarter-day keeps leap years honest) and about 52 weeks a year. Weeks lived is your days divided by seven; weeks left is the rest, and the expected date is your birthday plus the full lifespan.
The grid is the point. Drawing a life as a few thousand small squares makes the abstract suddenly concrete: a single average week is one tiny cell, and there are not that many of them. Live past the estimate and everything pins to done — the grid fills, weeks-left reads zero, and the framing changes to say every week from here is a bonus. It's a perspective tool, not a forecast: one life expectancy hides a wide spread, and nobody actually knows their number. Spend the squares well.