Age & Date Calculator
Calculate exact age in years, months, and days with a next-birthday countdown.
Select Dates
ChronologicalAccurate calendar calculation factoring in leap years.
Exact Age Result
Next Birthday in 0d0 Years,0 Months,0 Days
Total Days0
Total Weeks0
Total Months0
Total Hours0
How to use this tool & FAQs
Click any question below to expand its guide and answer
Calendar conventions
Dates are calendar days without time-zone shifts. Month anniversaries clamp to the last day of shorter months; a February 29 birthday is observed on February 28 in non-leap years. This is a calendar calculation, not a legal age determination.
How Age is Calculated
Age calculation measures calendar elapsed time rather than an arbitrary 365-day fixed multiplier. It accounts for variable month lengths (28, 29, 30, and 31 days) and leap years.