Pedigree Collapse Calculator
Calculate pedigree collapse with this free online tool
Pedigree Collapse Calculator
Calculate ancestor reduction from intermarriage in your family tree.
Quick Reference
Gen 1 (parents): 2 ancestors
Gen 5 (~150 yrs): 32 ancestors
Gen 10 (~300 yrs): 1,024 ancestors
Gen 20 (~600 yrs): 1,048,576 ancestors
Gen 30 (~900 yrs): ~1 billion ancestors
Gen 40 (~1200 yrs): ~1 trillion ancestors
World population in 1000 AD: ~300 million
Pedigree Collapse Calculator — free, fast, and works in your browser. No setup required, just open and start using it.
Key Features
Instant pedigree collapse calculator results
Works on desktop, tablet, and mobile
Free with unlimited use
No registration or account needed
Clean, ad-free interface
All processing happens in your browser
Pedigree Collapse Calculator
Enter Your Data
Input the required values or data into the tool fields
Adjust Settings
Configure any available options, units, or parameters
Run the Tool
Click the button to organize your input
Review Results
Read the output displayed on screen
Copy or Save
Copy the result to clipboard or save as needed
Use Cases
Comparing different inputs or scenarios
Learning and experimentation
Quick tasks without specialized software
Professional use for work or projects
Frequently Asked Questions
Does it work on mobile?
Yes, the tool works on any device with a modern browser.
Do I need to install anything?
No. The tool runs entirely in your web browser.
Can I use it offline?
Once loaded, most processing works without an internet connection.
Is my data safe?
All processing happens locally in your browser. No data is uploaded or stored.
Tool Information
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