What is the "Life in Weeks" concept?

Popularized by writer Tim Urban, the idea is to represent a human lifespan as a grid of small squares, each square equal to one week. Seeing every week of your life on one page puts time in stark, motivating perspective.

How is life expectancy calculated?

This tool uses the life expectancy value you enter. The default is 80 years (a common global average for developed countries). Adjust it to match your own country's statistics or personal health estimate.

How accurate is the weeks-lived count?

It is calculated from your exact birthdate to today's date using precise day arithmetic, so it is accurate to within the current week.

Why are some squares a different color?

Filled squares represent weeks already lived. Empty squares represent weeks remaining. The current week is highlighted separately so you can see exactly where you are on the grid.

Life in Weeks Calculator

Enter your birthdate and a life expectancy to see a visual grid of your life in weeks — lived vs. remaining.

Your Details

Date of Birth

Life Expectancy: 80 years

Summary

Enter your birthdate and a life expectancy to see a full visual grid of your life broken into weeks. Lived weeks are filled; remaining weeks are empty. Inspired by Tim Urban's popular "Your Life in Weeks" essay.

How it works

Enter your date of birth.
Set your target life expectancy (default 80 years).
The grid shows each week of your life — filled squares are weeks lived, empty squares are weeks remaining.
Read your summary stats: weeks lived, weeks remaining, and percentage complete.
Adjust the life expectancy slider to explore different scenarios.

Use cases

Reflect on how you have spent your time and what remains.
Use the visual grid as a reminder to prioritize meaningful activities.
Calculate weeks remaining for a personal or retirement milestone.
Share the visualization with friends for a philosophical conversation.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu