Date & Time Calculators
Age, calendars, workdays, clocks, shifts and time conversion calculators
Age Calculator
Calculate age in completed years plus approximate months and days from a birth date.
Calculate now →Birthday Countdown Calculator
Calculate days remaining until the next birthday.
Calculate now →Day of Year Calculator
Find the ordinal day number of a date within its year.
Calculate now →ISO Week Number Calculator
Find the ISO week number and ISO week-year for a calendar date.
Calculate now →Add Days to Date Calculator
Add a number of calendar days to a starting date.
Calculate now →Subtract Days from Date Calculator
Subtract a number of calendar days from a starting date.
Calculate now →Add Weeks to Date Calculator
Add whole or fractional weeks to a starting date.
Calculate now →Add Months to Date Calculator
Add calendar months to a starting date while preserving the day where possible.
Calculate now →Add Years to Date Calculator
Add calendar years to a starting date.
Calculate now →Business Days Between Dates Calculator
Count Monday-through-Friday business days between two dates, excluding weekends.
Calculate now →Workdays Until Deadline Calculator
Estimate weekday workdays remaining until a deadline.
Calculate now →Calendar Weeks Between Dates Calculator
Convert the time between two dates into weeks and remaining days.
Calculate now →Minutes to Hours & Minutes Calculator
Convert a total number of minutes into hours and remaining minutes.
Calculate now →Seconds to HH:MM:SS Calculator
Convert total seconds into hours, minutes and seconds.
Calculate now →Decimal Hours to Hours & Minutes Calculator
Convert decimal hours into hours and minutes.
Calculate now →Hours & Minutes to Decimal Hours Calculator
Convert hours and minutes into decimal-hour format.
Calculate now →Daily Time Card Hours Calculator
Calculate paid work time from clock-in, clock-out and unpaid break minutes.
Calculate now →Weekly Work Hours Calculator
Calculate weekly paid hours from daily hours and days worked.
Calculate now →Shift End Time Calculator
Calculate shift end time from start time, paid hours and break minutes.
Calculate now →Shift Duration Calculator
Calculate shift duration between start and end times, including overnight shifts.
Calculate now →Time Zone Offset Converter
Convert a clock time between two UTC offsets.
Calculate now →12-Hour to 24-Hour Time Converter
Convert a 12-hour AM/PM clock time to 24-hour format.
Calculate now →24-Hour to 12-Hour Time Converter
Convert 24-hour clock time to 12-hour AM/PM format.
Calculate now →Unix Timestamp to Date Calculator
Convert a Unix timestamp in seconds to a UTC date and time.
Calculate now →Date to Unix Timestamp Calculator
Convert a calendar date at 00:00 UTC to a Unix timestamp.
Calculate now →