How does this work?
Simple arithmetic, shown honestly. Every number traces back to something you told us.
01
You tell us three things
Your age, roughly where you live, and how often you actually do the things that matter — including seeing the people you love. Optionally your own life expectancy assumption.
02
We look up your years ahead, then multiply
Remaining years come from a life table: given you have already reached your age, how many more years are expected? Remaining occurrences = that number × how often it happens per year. No modelling, no black box.
03
Why it isn't 'average lifespan minus your age'
Life expectancy at birth is an average across everyone, including people who die young. Once someone has already reached 85, those early deaths drop out of their pool — so their expected remaining years are counted only among people who also made it that far. That's why an 85-year-old has about 7 years expected ahead, not zero, and a 65-year-old about 21.
04
Shared time uses the smaller of two numbers
For each person, we take the shorter of your two estimated remaining spans — because shared time ends when either of you does. Then multiply by how often you're together.
05
Who you spend time with changes with age
One step shows a curve of average hours per day spent with parents, siblings, friends, partners, children and co-workers across a lifetime, drawn from US time-use survey data. It's context, not a calculation — it never changes any of your own numbers. It's there because the pattern is stark: time with parents and childhood friends drops away through your twenties, and time alone climbs steadily after 40.
06
Every dot is one opportunity
We draw the number rather than print it, because 34 holidays reads very differently as 34 circles you can point at.
07
You can change any assumption
Life expectancy, frequency, who's on the list. Change one and every number updates instantly. Nothing is stored anywhere but your own browser.
08
Why relationships matter most
The Harvard Study of Adult Development tracked participants for nearly 80 years. Close relationships were the strongest predictor of long-term health and happiness. More than money, fame or IQ. People most satisfied in their relationships at age 50 were the healthiest at age 80.
This is a reflection tool
These numbers are estimates designed to help you reflect. They are not predictions of how long you or anyone else will live. It can't know what your life holds, and it isn't trying to. It's here to make the finite visible so you can choose deliberately.