Date & Age Calculators

9 calculators

Age, date difference, working days, countdown and time duration calculators.

• Age CalculatorPopularCalculate your exact age in years, months and days plus total days and hours lived from your date of birth.
• Add Days CalculatorAdd or subtract any number of days from a date to find the resulting date and its weekday.
• Birth Year CalculatorWork out the year you were born from your current age and birth month/day — exact if your birthday has passed, a range if it hasn't.
• Birthday CalculatorDiscover your next birthday date, how many days until it, the weekday it falls on and the age you will turn.
• Countdown CalculatorSee how many days, hours and minutes remain until a target date, or how many have passed since a past date.
• Date Difference CalculatorFind the exact number of days, weeks, months and years between any two dates, with inclusive and exclusive counts.
• Day of Week CalculatorFind the weekday, day of the year and ISO week number for any date, and see which ISO week early-January and late-December dates sit in.
• Time Duration CalculatorCalculate the exact duration between two times of day, handling overnight shifts (e.g. 22:00 to 02:00 = 4 hours).
• Working Days CalculatorCount working days (Monday–Friday) between two dates, excluding weekends and optional public holidays.