The number nobody likes to do
It's an uncomfortable calculation, which is exactly why most of us never do it. If your parents are 60, you see them twice a year, and they live to 85, that's 25 years × 2 visits: about 50 more visits. Fifty. Most people guess something in the thousands, because it feels like there's always next time.
The deeper surprise comes when you compare it with childhood. If you lived at home until 18, you spent something like 6,500 days in the same house as your parents. Once you move out, the time together shrinks to a few days a year. By your thirties, many people have already spent well over 90% of the in-person time they'll ever have with their parents. Tim Urban described this idea memorably in his 2015 essay The Tail End; this calculator lets you put in your own numbers.
How it's calculated
Years left = the age you choose for them to live to, minus their age now. Visits left = years left × visits per year. Days together = visits × days per visit. For the "already spent" share we assume you lived with them every day until you were 18, then saw them at the same rate you do now. If you're under 18, the years you'll still live at home are counted as full days.
All of these are estimates, and deliberately simple ones. We default to 85 because a 60-year-old in the US can, on average, expect to live into their early 80s (period life tables put it around 21 to 24 more years), and it's kinder to plan a little long than a little short. Nothing you type is saved or sent; these numbers stay on this page.
Don't let it be sad. Let it be a nudge.
Tomorrow life is too late. Live today.Martial
The point isn't the number, it's what you can do about it, and there's a lot. Seeing them three times a year instead of two is 50% more time. Staying four days instead of two doubles it. A weekly phone call adds hundreds of conversations you'd otherwise not have. Unlike most numbers about time, this one is genuinely yours to change.
So do the math once, feel it, and then do something small tonight: call them, send the photo, put the next visit in the calendar. If your parents are no longer here, or the relationship is complicated, please be gentle with yourself; the same idea applies to anyone you love and don't see enough. You can also look at your own summers left or weekends left.
Keep what matters in view
Days Unspent is a live desktop wallpaper for Mac and Windows: the days you have left to spend, your weeks as a spiral, and one line for what you're spending them on right now. Some people simply set it to "Call Mum on Sundays". This calculator is free. The wallpaper is $29, once.