Age Timeline Calculator
Enter a date of birth to see the exact date of every major birthday milestone.
About this calculator
This age timeline calculator lays out common milestone birthdays — 1, 5, 10, 13, 16, 18, 21, 25, 30, 40, 50, 60, 65, 70, 80, 90 and 100 — with the exact calendar date each one falls on, marking which have already passed.
It's a handy way to plan ahead for milestone celebrations or to see, at a glance, a life mapped out in round-number birthdays.
How it works
Enter the date of birth
Used as the anchor for every milestone calculation.
Calculate
The tool computes the exact date for each milestone age.
Browse the timeline
See which milestones are past and which are still upcoming.
Frequently asked questions
Which ages are included?
Common milestones: 1, 5, 10, 13, 16, 18, 21, 25, 30, 40, 50, 60, 65, 70, 80, 90 and 100.
Can I calculate a custom milestone age?
Use the exact age calculator or date-difference calculator to add any specific number of years to a date of birth.