Date & Time Calculators
Calculate age, days between dates, business days, time durations, time zones and countdowns.
Age CalculatorExact age in years, months and days from a birth date.Date CalculatorAdd or subtract days, weeks, months and years.Date Difference CalculatorDays, weeks and months between two dates.Time CalculatorAdd or subtract hours, minutes and seconds.Hours CalculatorHours worked between two times, minus breaks.Time Duration CalculatorExact time between two dates and times.Day CounterCount days between dates, including or excluding endpoints.Day of the Week CalculatorWhat day of the week any date falls on.Time Zone ConverterConvert times between world time zones with DST.Business Days CalculatorWorking days between dates, excluding weekends and holidays.Countdown TimerLive countdown to any date, shareable by link.
About Date & Time Calculators
Date and time calculators handle the details that make calendar math tricky: leap years, month lengths, weekends and time zones. Dates are shown in your local format, and everything is computed in your browser.