Age Calculator
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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v2.4.0-Stable∞
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100%
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Instant Results
Age updates as you change dates.
Knowledge Base
Frequently Asked Questions
How does the age calculator work?↓
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.
Can I calculate age as of a past or future date?↓
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.
How are total weeks and months calculated?↓
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.
How is 'days to next birthday' calculated?↓
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.