Enter your date of birth to draw your calendar
4160 squares. One per week. You will not like how many are already filled in.
The life-in-weeks idea is simple: a human life is about 4,000 weeks, few enough to fit on a single page. Seeing the used squares next to the empty ones is a surprisingly effective antidote to "someday". This calculator draws the grid for your dates, adds the stats people actually ask about — summers left, weekends left, years of sleep ahead — and gives you a poster to keep it in view.
Weeks lived is the integer part of days lived ÷ 7, where days lived is the calendar-day difference between your birth date and today in your local timezone. Weeks total is life expectancy × 52. Percent lived is the ratio, capped at 100.
Milestones (18, 25, 30, 40, 50, 60, 65) are placed at age × 52 on the grid and shaded when still ahead of you. The on-page grid redraws to your screen width with a ResizeObserver; the poster and share card render the same grid onto an offscreen canvas at print resolution.
Derived stats: weekends left equals weeks left; summers left is the whole years remaining; years asleep ahead assumes eight hours a night, one third of the remaining time.
A 30-year-old printing the poster for a desk wall as a daily reminder that the grid is 37% full.
A teacher using the grid in a personal-finance or philosophy class to make "time is finite" concrete.
Someone planning early retirement comparing 65 vs 55 on the milestone row and counting summers in between.
A memento-mori enthusiast sharing the card on their birthday instead of an age.
Scope note: The grid uses 52-week years, so a 365-day year leaves about one extra day per year unaccounted for; over 80 years that drift is roughly 2.5 weeks. National life expectancy is an average across a population and says little about any individual. The tool offers perspective, not medical or actuarial advice.
Enter your date of birth and pick a life expectancy (or a country preset).
Read the headline: percent of your expected life already lived.
Scroll the grid — dark squares are weeks lived, the pink one is this week, pale pink squares are milestones.
Download the poster, or share the card with your numbers.
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