I’m a numbers person.
I’ll admit it.
Always have been.
So naturally, at some point in my genealogy journey, I started wondering:
Okay… but how complete is my family tree actually?
Not emotionally. Not spiritually.
Mathematically.
Because if there’s one thing genealogy quietly teaches you, it’s this:
There are always more people to find.
Just when you think:
I’m making great progress!
You suddenly realize:
Your 6th great-grandparents have collectively decided to vanish into historical mist.
Rude.
Then one day, while reading the “What’s Your Genealogy Score?” post from the Genea-Musings blog, I had a moment of:
Wait… Do other people do this too?!
Because apparently I’m not the only person who enjoys turning family history into a spreadsheet problem.
So if you’ve ever wondered:
How complete is my family tree?
Pull out your tree, favorite spreadsheet (or notebook if you’re more emotionally stable than me), and let’s calculate your genealogy score.
What Is a Genealogy Score?
Your genealogy score is essentially:
the percentage of your direct ancestors you’ve identified.
In other words: How complete is your family tree?
For example:
You might know:
- all of your grandparents
- most of your 2nd great-grandparents
- but suddenly your 5th great-grandparents become mysterious historical ghosts.
Completely normal.
Genealogy scores help you see:
- where your research is strongest
- where branches get thin
- what lines may deserve more attention
It’s oddly motivating.
(At least if you enjoy numbers and self-inflicted genealogy challenges.)
How Does the Math Work?
Here’s the basic formula:
Genealogy Score = Identified Ancestors ÷ Total Possible Ancestors × 100
Simple in theory.
Slightly overwhelming once the generations start doubling.
Because family trees grow FAST.
Like… Alarmingly fast.
Here’s what the math looks like:
| Generation | Ancestors in Generation |
| Parents | 2 |
| Grandparents | 4 |
| Great-Grandparents | 8 |
| 2nd Great-Grandparents | 16 |
| 3rd Great-Grandparents | 32 |
| 4th Great-Grandparents | 64 |
| 5th Great-Grandparents | 128 |
| 6th Great-Grandparents | 256 |
And suddenly you understand why genealogy becomes a lifelong hobby.
Want the Easy Version?
If manually counting ancestors sounds mildly overwhelming (completely fair), I made a free Genealogy Score Tracker to do the math for you.
Just plug in how many ancestors you’ve identified and the spreadsheet calculates your genealogy score automatically.
👉 Click here to make your own copy of the tracker
Fair warning: It may accidentally turn genealogy into a game.
Step 1: Pick a Generation Range
First:
Decide how far back you want to measure.
If you’re newer to genealogy?
Try:
4–5 generations
That’s manageable and still meaningful.
If you’ve been researching for a while?
Maybe challenge yourself with:
8–10 generations
Though I should warn you:
This is usually the point where historical records start collectively saying:
Good luck.
For me?
I picked 10 generations.
Which means counting back to my 7th great-grandparents.
Ambitious?
Maybe.
Slightly humbling?
Oh, definitely.
Step 2: Tally Everyone Up
Now comes the counting.
If you use genealogy software like:
- Family Tree Maker
- RootsMagic
- Ancestry
- FamilySearch
You can often generate:
- pedigree charts
- ancestor lists
- Ahnentafel reports
Which makes life much easier.
If not? No worries.
You can absolutely do this manually:
Start with:
- yourself
- parents
- grandparents
- keep moving backward
Then count how many direct ancestors you’ve identified in each generation.
Important Rule: Don’t Skip Duplicate Ancestors!
This part feels weird.
But trust the process.
If the same ancestor appears twice because cousins married somewhere back in history:
Count them twice.
Yes, really.
Because this exercise is about positions in the tree
—not unique individuals.
Genealogy gets weird sometimes.
Step 3: Compare to the “Perfect” Tree
Now compare:
How many ancestors you identified
vs.
How many ancestors should theoretically exist
This is where things get interesting.
Because suddenly you might notice:
“Oh wow, one branch basically disappears after 1850.”
Or:
“Apparently my mother’s side was wildly better at leaving records.”
Honestly, that’s useful information.
It helps you decide:
Where to focus next.
Why This Is Actually Helpful
This isn’t just genealogy trivia.
A genealogy score can help you:
- identify missing branches
- set research goals
- decide where to focus next
- estimate how complete a printed family book may feel
It also helps answer the question:
How much do I really know?
Without accidentally spiraling into:
I know absolutely nothing.
(Been there.)
My Genealogy Score
My results ended up being… Pretty much what I expected.
I had:
✅ 100% through my 2nd great-grandparents
✅ High 80s into 3rd great-grandparents
And then… Things got dramatically less impressive.
Very quickly.
By my 10th generation, my score dropped to:
15.05%
Which honestly?
Higher than I expected.
But also a reminder that:
I apparently still have some work to do.
Or at least a few more historical rabbit holes to disappear into.
Want to calculate your own while you read?
👉 You can grab the FREE Genealogy Score Tracker here.
One Important Reminder
Low genealogy score?
Not a failure. Not even close.
Some family lines are:
- harder to research
- affected by immigration
- impacted by war
- missing records entirely
Sometimes historical records simply said:
Best of luck to future genealogists.
And disappeared.
Progress matters more than perfection.
Always.
Final Thoughts
If you calculate your genealogy score…
What generation completely humbled you?
Because for most of us:
There’s always one branch that suddenly turns into:
“Someone named John, maybe?”
And sometimes that’s part of the fun!
What’s your genealogy score?
Haven’t calculated yours yet? Grab the FREE Genealogy Score Tracker here.