Age Calculator
Calculate exact age between a date of birth and a selected date.
Your age
31 years 4 months 10 days
Total months376
Total weeks1,636
Total days11,455
Total hours274,920
Total minutes16,495,200
Day of the week you were bornThursday
Next birthdayJune 15, 2027 (233 days)
How it works
The calculator counts full years, then remaining months, then remaining days from your birth date to the target date, correctly handling leap years and different month lengths.
Methodology & sources
Every formula on this page is verified against the authoritative publications listed below. Assumptions describe the boundaries of the estimate.
Formulas
- Age = full years, then remaining months, then remaining days between two dates.
- Total days = ⌊(now − birth) ÷ 86,400,000 ms⌋
Assumptions
- Uses the proleptic Gregorian calendar; leap years handled automatically.
- Dates are interpreted in the browser's local timezone.
Citations
- [1]ISO 8601-1:2019 — Date and time representations — International Organization for Standardization.Verified 2026-07-22.
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This calculator provides estimates only. Results depend on the values entered and may not account for every individual situation. This site does not provide financial, tax, legal, investment, medical, or academic advice.