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Your whole life on one grid — one square per week
Enter your date of birth to draw your calendar
4160 squares. One per week. You will not like how many are already filled in.
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Browse Productivity KitsThe 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.
About the Life in Weeks Calculator
It counts whole days from your birth date to today in your local timezone and divides by seven. The grid uses 52 weeks per year, the convention popularised by the Wait But Why "Your Life in Weeks" post, so an 80-year life is 4,160 squares.
The presets are period life expectancy at birth from the UN World Population Prospects 2024 revision, rounded to whole years: world ≈ 73, India ≈ 72, United States ≈ 79, United Kingdom ≈ 81, Japan ≈ 85. Your own figure depends on far more than a national average, so treat the number as a perspective tool, not a forecast.
Yes. The Download poster button renders a 1600×2200 PNG with the full grid and your numbers, which prints cleanly at A3 or A4. Nothing is sent to a server — the image is generated in your browser.
Only in your own browser (localStorage) so the grid is still there when you come back. It is never sent anywhere. Clear site data to remove it.
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