How much time do I have left with my parents?
Enter their birthdays, and yours if you like, and see the time you statistically have left together: in years, months, weeks, days, or visits. These are population averages, not predictions; real lives are kinder and crueler than any table. Everything stays on your device: this page can't make network requests, and nothing you type is uploaded.
You (optional, unlocks the “share of time together”)
Who do you want more time with?
Where do these numbers come from?
The countdown uses remaining life expectancy at their current age, not life expectancy at birth. That distinction matters: a 75-year-old has already outlived many risks, so their expected remaining years reach past the headline “average lifespan” you see in the news. The 🇺🇸 US curve is computed from official Social Security Administration mortality tables (2007 period life table, ages 0–119). The 🇹🇼 Taiwan curve is an estimate: it is calibrated so life expectancy at birth matches the official 2024 figures from Taiwan's Ministry of the Interior (男 77.42 / 女 84.30), with the age shape adapted from the US table. If you know better numbers for someone, every person has a custom override.
The math assumes the expected passing lands on a birthday (whole ages only), which keeps the numbers honest without pretending day-level precision. If a month or day is left blank, July 1 is used as the expected middle of the year. And once more, gently: these are averages across millions of lives, not predictions about the people you love. Plenty of parents outlive every table.
Does any of this leave my device?
No. Birthdays are sensitive, so this page is locked down with a connect-src 'none' policy: the browser physically blocks every network request. What you enter is saved only in your browser's local storage so it's still here next visit; “Clear everything” wipes it.