Age Difference Calculator
Enter two dates of birth to see the exact age gap between two people in years, months and days, and who is older.
How the age gap is calculated
The calculator starts from the older person's birth date and counts complete years up to the younger person's birth date, then complete months, then the remaining days. It is the same method used to calculate age, so the gap stays the same no matter how many years pass.
Everyday uses
People often want to know the age gap between siblings, between partners, or between a grandparent and a grandchild. You can also see how old one person was on the day the other was born, which makes a nice detail to add to a birthday card.
When the day gets close, browse birthday wishes by person or turn your message into a personalized card.
Frequently asked questions
Does the age difference change over time?
No. The difference between two birth dates is fixed. Both people get older, but the distance between them stays the same.
Does the order of the dates matter?
No. The calculator works out who is older automatically, so you can enter the dates in any order.
Are the dates stored?
No. Everything is calculated on your device and nothing is sent to our server.