Age, Date & Calendar
Calculate your exact age, find the difference between two dates, count days until an event, and more — all handled with precise calendar math.
Calculate your exact age in years, months, and days from your date of birth.
Open calculatorDate CalculatorAdd or subtract a number of days from a date to find the resulting date.
Open calculatorDate Difference CalculatorFind the difference between two dates in years, months, days, and more.
Open calculatorDays Until Date CalculatorSee how many days remain until a future date, or how long ago a past date was.
Open calculatorBirthday CalculatorFind your next birthday, the day it falls on, and how many days away it is.
Open calculatorAge in Days CalculatorFind out exactly how many days old you are.
Open calculatorAge in Months CalculatorFind your total completed months of age, with remaining days.
Open calculatorAge in Weeks CalculatorFind your total completed weeks of age, with remaining days.
Open calculatorDay of the Week CalculatorFind out what day of the week any date falls on.
Open calculatorDay of Year CalculatorFind which day number of the year any date falls on.
Open calculatorWeek Number CalculatorFind the ISO 8601 week number for any date.
Open calculatorLeap Year CalculatorCheck whether any year is a leap year, and find the nearest leap years.
Open calculatorWorking Days CalculatorCount the number of working (Monday–Friday) days between two dates.
Open calculatorAdd Days to Date CalculatorAdd a number of days to a date to find the resulting date.
Open calculatorSubtract Days from Date CalculatorSubtract a number of days from a date to find the resulting date.
Open calculator