What is a step-grandfather?
A step-grandfather is most precisely your grandparent's husband who is not your biological grandfather. The word also stretches to your step-parent's father, though that sense is looser. Neither involves blood — both arrive through a remarriage above you — and most families simply let 'grandpa' cover whoever fills the seat.
Relationship
Step-grandfather
- You
- Your grandparent
- Their husband
From the other side, you are their step-grandchild.
Step relationships run through a remarriage, not a shared ancestor, so the ancestor chart can't draw them.
The calculator below works out blood relationships through a shared ancestor — use it to explore the rest of your tree.
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This relationship sits outside the shared-ancestor model, so the card above carries the answer and the calculator opens in its default state. Work out any blood relationship with it, or open the full relationship calculator.
FAQs
Is my stepmom's father my step-grandfather?+
In the word's looser sense, yes — strictly it means a grandparent's later husband.
Who am I to my step-grandfather?+
Their step-grandchild.
Does the calculator store my family details?+
No — it runs entirely in your browser. Nothing you enter is uploaded or saved on our servers.
Start with one relative and see what comes back.
Add what you remember and AncestorIQ searches for the rest. Free to build your tree for as long as you like.
No credit card needed. Your tree stays yours.
