Your life, one square a week.
Enter your birth date and the grid fills in: every week you have lived as a dark square, this week in gold, and every week ahead as an outline. You also get the count of Mondays, weekends and summers still to come, based on a life expectancy you choose yourself.
Your weeks, behind and ahead
Your birth date
Life expectancy to plan with
A horizon you choose, not a prediction. The EU average at birth is about 81 years, and a 65-year-old can expect roughly 20 more.
Your date is kept in this browser only, so the grid is ready next time.
Each square is one week. A row is one year.
How it works.
- Pick the day, month and year of your birth, then set the life expectancy you want to plan with, from 70 to 100 years.
- Press Show my weeks: the weeks you have lived fill in dark green, this week glows gold, and the rest stay open.
- Read the count of Mondays, weekends and summers ahead, then save the picture or share it.
Where the numbers come from
A year has 52 weeks and 1 day, so a life of 90 years is about 4,680 weeks, or 4,696 if you count the calendar precisely. The grid rounds this to 52 squares a row and one row per year of the horizon you set, from 70 years (3,640 squares) to 100 years (5,200 squares). Weeks lived are the full 7-day periods between your birth date and today, which is why the figure runs slightly ahead of your age times 52: at 40 you have lived 2,087 weeks, not 2,080. Mondays, weekends and summers ahead are counted on the calendar from tomorrow to the day the chosen horizon runs out, a weekend by its Saturday and a summer by its June.
Life expectancy, in real figures
The slider is a personal choice, not a forecast, but the reference points help. Global life expectancy at birth was about 71 years in 2021 according to the WHO, down from 73 years in 2019. In the EU it stood at about 81 years in 2023, in Japan at about 84 years. Women live on average about 5 years longer than men. One figure matters more than the others once you are past 60: life expectancy at birth includes everyone who died young, so the years remaining at 65 are more than a simple subtraction suggests. In the EU a 65-year-old can expect roughly 20 more years, which points to about 85 rather than 81. If you are 65 or older, move the slider to 85 or beyond before you trust the weeks ahead. The default of 82 years sits between the EU average at birth and that older-age figure.
What the grid is for, and what it is not
The filled squares are history. The point of the grid is the open part: 2,000 or 3,000 outlined weeks is a lot of room, and a single row of 52 is enough to build a habit, which takes about 66 days or 10 squares according to the research in our guide on how long a habit takes to form. Counting summers makes the number concrete: 35 summers is a list you can plan, 1,800 weeks is not. Two guides help you decide what the open squares should hold. Healthspan versus lifespan explains why healthy years, not total years, are the number to protect, and social connection and health shows why the weeks you spend with other people count twice. The tool is not a prediction of your lifespan, it does not know your health, and it stores nothing except your birth date in your own browser. Use it as a calendar with a horizon, not as a countdown.
Frequently asked.
Is the expectancy on the slider a prediction?
No. It is the horizon you choose for the grid, anywhere between 70 and 100 years. The EU average at birth is about 81 years and a 65-year-old in the EU can expect roughly 20 more years, so many people set it at 82 to 85.
Why is my weeks-lived figure higher than my age times 52?
A calendar year has 52 weeks and 1 day, 2 days in a leap year. Over 40 years those extra days add up to 7 more weeks, so someone who turned 40 today has lived 2,087 weeks rather than 2,080.
How are summers, weekends and Mondays ahead counted?
They are counted on the real calendar from tomorrow to the day your chosen horizon runs out. A weekend counts by its Saturday and a summer by its June, so each figure drops by one at that point in the year.
What happens if I am older than the expectancy I set?
The grid fills completely and the weeks ahead show 0. Move the slider up: at 65 or beyond, 85 to 90 years is a more realistic horizon than 82.
Is my birth date stored anywhere?
Only in your own browser, as a single entry, so the grid is ready the next time you open the page. Nothing is sent to Vitista or anyone else, and clearing your browser data removes it.
Does the grid account for leap years and time zones?
Weeks lived are computed from whole calendar days, so leap days are included and time zones do not matter. The grid itself uses 52 squares a year, which is why a 90-year life shows 4,680 squares rather than 4,696 calendar weeks.
Guides behind this tool
Longevity
Healthspan versus lifespan: the years that count
Life
How long a habit takes to form: 66 days, not 21
Life
Social connection and health: what the large studies showMore tools
This tool draws calendar arithmetic around a life expectancy you choose. It is not a prediction of your lifespan and it knows nothing about your health. This page is for general information and does not replace medical advice.