Age Difference Calculator
Calculate the exact age difference between two people in years, months, and days from their birth dates.
Your data stays in your browser. We do not store, collect, or transmit any information you enter.
Age Difference
Age Difference calculates the exact gap between two birth dates in years, months, and days.
The calculation works by:
- Finding the absolute difference between two dates
- Breaking it into full years, remaining months, and remaining days
Fun facts about age gaps:
- Average age difference in US couples: 2.3 years
- The “half your age plus seven” rule sets a social minimum
- Age difference in days helps for twin/sibling comparisons
Note: This calculator uses calendar months, which vary in length (28–31 days).