Age & Date Calculator
Calculate exact age, compare birthdate gap between two people, or perform date math (adding/subtracting time periods).
1. Age Calculator (Real-Time Ticker)
Live calculationChoose any date in the past to calculate total elapsed time.
Your Exact Age
0 Years, 0 Months, 0 Days
0 seconds lived
Countdown to Next Birthday
0 Days remaining
2. Age Gap Calculator (Compare 2 People's Birthdays)
E.g., Elder sibling / partner / friend
E.g., Younger sibling / partner / friend
Age Difference / Gap
0 Years, 0 Months, 0 Days
Calculating…
3. Date Math (Add / Subtract Time)
Calendar calculationHow is Age & Birthdate Gap Calculated?
This tool calculates elapsed Gregorian calendar time between dates. When comparing two people's birthdates, it dynamically identifies who was born first (the older individual) and breaks down the exact difference into Gregorian calendar years, months, and days, as well as total days, weeks, and hours. Leap years (such as February 29th) and varying monthly day lengths (28, 30, or 31 days) are fully handled client-side.
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