Memento Mori
A life in weeks calendar shows an entire human lifespan on a single page. Every dot is one week. Each row is one year of 52 weeks, and the rows run from your birth to your expected lifespan. An 80-year life is about 4,160 dots, few enough to take in at a glance.
Filled dots are the weeks you have already lived. Empty dots are the weeks that may still be ahead of you. Seeing both at once is the point: it turns an abstract number into something you can look at, a practice the Stoics called memento mori.
| Lifespan | Weeks | Days |
|---|---|---|
| 60 years | 3,120 | 21,915 |
| 70 years | 3,640 | 25,568 |
| 80 years | 4,160 | 29,220 |
| 90 years | 4,680 | 32,873 |
| 100 years | 5,200 | 36,525 |
Multiply your age in years by 52 and add the weeks since your last birthday. A 30-year-old has lived about 1,560 weeks; a 40-year-old about 2,080. Enter your birth date above and the grid counts it for you, down to the current week.
Roughly 4,000. A 70-year life is 3,640 weeks, an 80-year life is 4,160 weeks and a 90-year life is 4,680 weeks. Global average life expectancy is in the low seventies, and someone who lives to 80 gets about four thousand weeks.
The default lifespan is life expectancy at birth for your country and sex from the World Health Organization's 2023 estimates, rounded to whole years. For the 10 small states WHO does not cover, such as Monaco and Andorra, World Bank figures are used instead; every source is listed on the life expectancy page. It is an average, not a prediction, so you can move the slider to any age between 50 and 110.
Memento mori is Latin for "remember that you must die". Stoic philosophers such as Seneca and Marcus Aurelius used the reminder of mortality not to feel gloomy but to stop postponing what matters and to spend each day more deliberately.
The idea of drawing a whole life as a grid of weeks was popularised by Tim Urban's 2014 Wait But Why essay "Your Life in Weeks", and the number itself by Oliver Burkeman's 2021 book "Four Thousand Weeks". inweeks.life turns that chart into an interactive calendar personalised to your birth date and country.
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