There’s a calculation I’ve been avoiding for about three years.
My parents are in their mid-seventies. I live far from them. I see them maybe twice a year — sometimes three times, sometimes once.
If they live to 85 — a reasonable estimate for people their age, in their health — I have roughly 10 years left. At two visits per year, that’s 20 visits.
20 visits. That’s not very many.
I’ve known this number existed. I didn’t want to look at it directly. Last year, as part of building a set of life visualization tools, I finally looked.
Why This Number Matters
Most people who move away from their parents maintain a vague sense that they’ll “see them more” at some point. When things settle down. When work gets less busy. When the kids are older.
The number cuts through this.
It doesn’t tell you how to feel or what to do. It tells you the arithmetic. Whatever relationship you’re going to have with your parents in their final decade, this is approximately how many visits you have to have it in.
The earlier version of the calculation I’d seen online — the Tim Urban version, which is widely shared — uses the remaining-visits framework but keeps the numbers abstract. I wanted to make it personal. I wanted to input my parents’ ages, my visit frequency, and get my number.
So I built a calculator.
The Calculator
The tool asks for:
- Your parents’ current ages
- Your current visit frequency (times per year)
- An estimate of how long they’ll live (defaulting to age 85, adjustable)
It then outputs:
- Estimated visits remaining under current frequency
- What the number looks like if you increased visits by 1x per year, 2x per year
- The “visit budget” you’ve already used vs. what remains
For me, the numbers were:
Current trajectory: 18-22 remaining visits per parent (if they live to 85; fewer if to 80) If I added one extra visit per year: 28-32 visits Visits already used: Roughly 35-40 (I moved away in my late twenties, have been averaging 2x/year since)
The “visits already used” number was the most striking one. I’ve spent more than half my visit budget. The majority of the time I will spend physically present with my parents in my adult life has already happened.
I sat with that for a while.
What the Number Does and Doesn’t Do
The number doesn’t tell me to feel guilty. I don’t, particularly. I live where I live for real reasons. My parents are healthy and functional and not in need of constant presence. The distance has been the right arrangement.
But the number changes how I think about each visit.
When visits are abstract — when there are always more coming, when the relationship feels like it has infinite time — it’s easy to spend a visit in a distracted, low-quality way. Not fully present. Checking things on your phone. Having the same conversations you’ve had before.
When visits are finite and numbered, they feel different.
This is the same mechanism as the 900-square life grid, or the calculation of summers left with your kids. The visualization doesn’t change the facts. It changes your relationship to the facts.
I’ve found that I’m more present during visits now. Not because I’m performing presence — because the context has changed. I know, in a concrete way, that this visit is one of a limited number. That changes what I pay attention to.
The Asymmetry
There’s something in this calculation that took me a while to see.
My parents aren’t doing the same math I’m doing.
They see me infrequently, and they’re aware — in a way that I probably wasn’t until recently — that the visits are finite. They’ve been living with this calculation for longer than I have.
I asked my mother, on a recent call, whether she thought about this. She said yes, she did. She said she tries not to mention it because she doesn’t want to make visits feel heavy.
This is a common pattern in the biographies I’ve read. The older person has a different relationship to time than the younger person. The older person often sees the finitude clearly; the younger person often doesn’t, until something changes.
My father, who grew up with difficult circumstances and outlived most of his closest friends, has been explicit about it. He says he’s glad when I call because he knows I have a busy life. He doesn’t say “I’m glad you called because I don’t know how many calls we have left” — but I think that’s the context.
Building the calculator was partly about bringing myself to the same level of awareness that, I suspect, my parents have been operating with for years.
The Practical Part
After I built the calculator and ran it, I made two changes:
First, I added one trip per year. I went from two visits to three. It doesn’t sound like much, but it increases my remaining-visit count by roughly 50%. At 20 remaining visits, adding one per year is significant.
Second, I changed how I use the visits. I try to do at least one activity per visit that’s new — something I haven’t done with them before. A restaurant they haven’t been to. A neighborhood I haven’t seen. A conversation about something I haven’t asked about before.
The logic is simple: if visits are limited, fill them with things that won’t feel interchangeable in memory.
Why I Built It as a Tool
I could have just done this math on paper. I built it as a tool — and put it on my website — because I think a lot of people have been doing the same avoidance I was doing.
We know, abstractly, that our parents are aging and we’ll lose them eventually. Most of us prefer to keep this knowledge abstract.
The number makes it concrete. Concrete in a way that changes behavior.
I’ve heard from several people who used the tool and said they called their parents right afterward. A few said they booked a trip.
That’s the outcome I was hoping for when I built it. Not sadness. Action.
The Number Isn’t the Point
A friend of mine pointed out, when I showed him the tool, that the number is only meaningful if visits are what matter.
He sees his parents every week. He lives in the same city. For him, the number is over 500. But many of those visits are brief, routine, low-engagement.
We agreed that the thing the calculator can’t measure is the quality of attention within each visit.
That’s the actual scarce resource: not visits, but presence. The number of times you’ll have your parent’s full attention, and they’ll have yours, and something real will happen between you.
That number is probably smaller than either of us can calculate.
Related Reading
- How Many Summers Do You Have Left With Your Kids? I Did the Math and It Changed Me
- You Have 4,000 Weeks. I Mapped Out How History’s Greatest People Used Theirs.
- What Percentage of Your Life Is a Black Hole? I Built a Clock That Shows It
- Life Visualization Tools & Guides — Full Collection
- Building in Public Diary — All Entries
Leave a Reply