Birthday planning
Check how many days you have lived and how soon your next birthday arrives.
Age in days calculator
Days alive -
Approx. years -
Next birthday -
Days until birthday -
See examples
Milestone ideas
Find personal day milestones such as 10,000 or 15,000 days alive.
About this helper
This calculator compares your birth date with today's local date and converts the difference into calendar days. It also estimates years using the average Gregorian year length, so it is useful for quick planning rather than legal age verification.
Does my birth date leave my device?
No. The age calculation runs in your browser and does not need a server.
Is this the same as legal age?
No. Use official documents or local rules when legal age matters.