Life calendar
Your life, one box per week
A long life is about four thousand weeks. Enter your birth date and see them all at once: the ones behind you filled in, the ones ahead still empty.
Slide it to see how many of the remaining weeks that adds up to.
The age is only where the grid stops, not a prediction. Your birth date stays in this page; nothing is saved or sent.
Free tool from Focus and Screen Time
Why look at a life this way
Years are too big to feel and days too many to count. Weeks sit in between: eighty years is about 4,160 of them, few enough to print on a single page. Seeing the filled part next to the empty part does something a number cannot. Most people's first reaction is that the empty part is smaller than they assumed.
The idea is old. Stoic writers kept reminders of mortality on their desks, and the modern "life in weeks" chart was popularised by Tim Urban's Wait But Why essay and Oliver Burkeman's book Four Thousand Weeks.
How the grid is drawn
- Each row is one year of life, starting on your birthday. Each box is one week of that year, 52 to a row.
- Filled boxes are weeks you have lived. The bright one is the week you are in now.
- The grid stops at the age you pick. Nobody knows their number; 80 is a round figure near life expectancy in many wealthy countries.
The phone slider
Set the hours you spend on your phone on a typical day and part of the open area changes colour. That is the share of your remaining waking time, counted at 16 hours a day, that the habit adds up to if it stays the same. At four hours a day it is a quarter of every waking week you have left. It is arithmetic, not a judgement: some of those hours are well spent. The point is to make the choice on purpose.
What to do with it
Print the poster and fill in a box each Sunday. Circle the weeks you want to remember. Or just look at it once, close the tab, and do the thing you have been putting off.
Questions people ask
How many weeks are in a lifetime?
An 80-year life is about 4,160 weeks, counting 52 weeks a year. A 90-year life is about 4,680 weeks.
How do I calculate how many weeks I have lived?
Count the days from your birth date to today and divide by seven. A 30-year-old has lived roughly 1,565 weeks.
Is my birth date stored anywhere?
No. The calculation runs in your browser and nothing is saved or sent. The share button sends only the totals, never the date.
Weeks are made of days. Days are made of hours on a phone.
Time Debt: Screen Time is an iPhone app blocker with one different rule: extra time today is borrowed from tomorrow. You set a daily allowance for the apps you choose, and going over comes out of the next day.
Get Time Debt on the App StoreOne core plan is free; optional Pro is a subscription that adds features. Emergency access removes every shield until tomorrow, free, any time. Check the App Store for current terms.
Honest Little Apps publishes both Time Debt and this page. This is a separate browser tool and does not sync with the app. App details checked November 10, 2026.
On a computer? Open it on your iPhone
