Date & Time Calculators

Days between dates, time differences, adding days to a date, exact age and jet lag.

• Days Between Dates CalculatorPick two dates to see exactly how many days apart they are, along with the same gap in weeks, in years-months-days and in working weekdays.
• Hours Between Two Times CalculatorEnter a start time and an end time to get the elapsed hours and minutes, even when the shift crosses midnight.
• Add Days to a Date CalculatorStart with a date and add or subtract any number of days, weeks, months or years to find the resulting date.
• Age CalculatorEnter a date of birth to see your exact age and how many days until your next birthday.
• Jet Lag CalculatorPick where you leave from and where you land to see the clock difference, the local time you arrive and a rough guide to how many days your body clock may need to adjust.
• Day of the Week CalculatorPick any date.
• Week Number CalculatorPick a date to see which ISO week it falls in, the year that week belongs to, and the Monday and Sunday that start and end the week.
• Business Days CalculatorPick a start date and an end date, and decide whether to count the start day.
• Time CalculatorEnter two times as days, hours, minutes and seconds, and choose to add them or subtract the second from the first.
• Leap Year CalculatorCheck one year, or pick a range.
• Unix Timestamp ConverterPick a direction.
• Time Card CalculatorEnter your start time, end time and break for each day you worked.
• Countdown CalculatorPick an event, or choose a custom date and give it a name.