Age Difference Calculator
The Age Gap Is:
Whether you are comparing siblings, checking a relationship gap, or determining the time between two historical figures, the Age Difference Calculator provides the exact delta. Time is relative, and this tool puts that relativity into hard numbers. If you want to see if you and another person belong to different eras, try our Generation Finder.
The calculator uses absolute day subtraction, accounting for all leap years. This is useful for genealogy. For more focus on your individual age, use the Standard Calculator. If you want to see how old you were when a specific event happened, use the How Old Was I? tool.
Age Gap Questions
Does it matter which date I enter first?
No. The algorithm automatically determines the earlier date.
Can I calculate the gap in seconds?
This tool shows years, months, and days. For a total seconds count, visit Age in Seconds.
Are we in different generations?
Check our Generation Finder to find out.
How many days difference is there?
The tool provides a breakdown of years, months, and total days. For historical spans, see the Historical Tool.
Can I compare a person to an event?
Yes, or use the How Old Was I tool for a specific historical calculation.
Can I see the difference between twin births?
Yes, if you know the exact times. Use the Seconds tool for twin precision.