Calendar-based calculation
Your age increases on your birthday. Full calendar months are counted first, followed by the remaining days.
Date of birth calculator
Age Calculator by Date of Birth
How old am I? Enter your date of birth to find your exact age in years, months and days, plus your age in weeks, days, hours, minutes and seconds.
No signup. Just enter your birth date and get the result instantly.
More than years
See your age as total weeks, days, hours, minutes and seconds for a different view of the time you’ve lived.
Historical perspective
Compare your date of birth with famous events and see exactly how old you were, or how long before you were born.
About the Age Calculator
Quick answers about how the calculation works and what your birth date can tell you.
How does this age calculator work?
This calculator uses the standard birthday-based system, so your age increases on your birthday. When showing months and days, it counts full calendar months first, then the remaining days.
Is the result exact?
Years, months and days follow calendar rules. Totals in days, hours, minutes and seconds are based on elapsed time. Small differences can happen because of time zones and daylight saving rules.
What else can my birth date tell me?
Your birth date can also reveal the day of the week you were born and your zodiac sign. You can find your star sign at WhatIsMySign.org.
Why show famous events?
The event list uses fixed historical dates and your date of birth to make the passage of time easier to visualize. Use “Show More Events” to continue through the list.
Does getting older automatically mean gaining weight?
Not necessarily. Metabolism, activity level and lifestyle usually matter more than age itself. If you’re curious how your weight compares with your height, try the BMI Calculator.
Why does time feel faster as you get older?
Many people experience this. As routines become more familiar and fewer experiences feel new, years can seem shorter in hindsight even though the amount of time itself has not changed.
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