Age Difference Calculator
Calculate the age difference between two people by birthdate
Calculator
How to Use
Calculate the exact age difference between two people
Enter first birthday
Input the first person's date of birth
Enter second birthday
Input the second person's date of birth
View difference
See age gap in years, months, and days
Frequently Asked Questions
Subtract the younger person's birthdate from the older person's. The result can be expressed in years, months, days, or a combination. Our calculator handles partial years precisely.
A social rule suggesting the youngest person you should date is half your age plus 7. A 30-year-old: 30/2 + 7 = 22 minimum. This is just a guideline, not a rule - maturity and compatibility matter more.
The average age difference in marriages is 2-3 years, with the man typically older. About 8% of couples have a 10+ year gap. Larger gaps are more common in certain cultures and demographics.
Studies show slightly higher divorce rates for larger age gaps, but many factors matter more: shared values, communication, life goals. A 10-year gap can work perfectly while a 2-year gap fails. Individual compatibility is key.