Find your exact age in years, months, and days. See total days, weeks, and months lived plus days until your next birthday.
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Calculations
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Latency
100%
Browser-Based
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Age updates as you change dates.
Knowledge Base
Enter your date of birth and an optional reference date (defaults to today). The calculator computes the exact difference: years first, then remaining months, then remaining days — accounting for varying month lengths.
Yes. Change the 'Age as of' field to any date — past or future — to see what your age was or will be on that date.
Total days is the simple difference in calendar days. Total weeks is total days ÷ 7 (rounded down). Total months counts completed calendar months between the two dates.
The calculator finds the next occurrence of your birth month and day on or after the reference date, then counts the days until that date.