A free life-in-weeks calculator
Your life, one dot per week.
Net worth is stored life. Below is every week from the age you enter to the age you're planning to — filled for the weeks you've lived, open for the weeks still ahead. It's a deliberately uncomfortable way to see how many are actually left, and why the ones ahead are worth spending well, not just saving through.
Your numbers
This page just shows the shape of the time you have. The planner turns it into a plan: how much you can spend, which experiences fit into which weeks while your health can still carry them, and whether the numbers hold up against thousands of market paths.
See where your own weeks and your own money line up.
Build your plan →Common questions
How many weeks does an average life have?
About 4,160 for an 80-year life, or roughly 4,680 for 90 years — 52 weeks a year. Enter your own current age and planning age above to see your count split into weeks already lived and weeks ahead.
Where does the "life in weeks" idea come from?
It’s from Tim Urban’s 2014 essay on Wait But Why, "Your Life in Weeks" — a full life shown as a grid, one box per week. zeroleft borrows the visual and pairs it with a spending plan: the point isn’t just how many weeks are left, but what you do in them.
Why no health shading like some life-in-weeks grids?
zeroleft’s full planner does model expected health when it places experiences into your plan — that needs your actual profile, not a generic curve. This page is just the week count; the planner is where health, budget and timing come together.