Age & Birthday Calculators
All seven interactive age and birthday tools in one place. Check your exact age, compare birthdays, discover your next birthday, and find your generation.
Select a Calculator
Choose any tool below. Each calculator works independently.
Age Calculator
Your exact age in years, months and days
Calculate Your Exact Age
Select your birth date and the date you want to calculate your age on.
Live example loaded: Born 15 January 2000. Change the dates to calculate your own age.
Your Exact Age
Age in Days Calculator
Total days you have been alive
How Many Days Old Am I?
Choose your inputs and select Calculate → to see accurate results.
Elapsed calendar days are counted from birth to the selected date, without counting the birth date as a complete day.
Your Results
Calculated successfullyAge Difference Calculator
Age difference from two birth dates
Compare Two Birth Dates
Enter each person's date of birth to calculate the difference.
Exact Age Difference
Calculated successfullyTheir Ages Today
Age Gap Calculator
Compare two ages without birth dates
Compare Two Ages
Choose your inputs and select Calculate → to see accurate results.
Person A
Person B
Your Results
Calculated successfullyBirthday Calculator
Discover upcoming birthdays
Find Your Upcoming Birthdays
Choose your inputs and select Calculate → to see accurate results.
For February 29 births, choose the observed date when there is no February 29:
Your Results
Calculated successfullyYour Next Five Birthdays
Birthday Countdown
Live time until your next birthday
Birthday Countdown Calculator
When Is Your Next Birthday?
Choose a birth date. Your birthday countdown updates every second.
Your Birthday Countdown
Updating every secondGet ready for your celebration.
Counting the calendar days of your birthday year.
What Generation Am I?
Find your birth-year generation
Find Your Generation
Choose your inputs and select Calculate → to see accurate results.
Your Results
Calculated successfullyWhy might another website show a different result?
Generational labels are research conventions. For instance, McCrindle labels Gen Z as 1995–2009, while Pew uses 1997 as the starting point of Gen Z. Neither should be treated as an objective personal identity test.