← All Calculators
Date & Time Calculators
Free calculators for age, date differences, time zones, and work hours.
Age Calculator Calculate your exact age in years, months, and days from your birth date. Find o
Date Calculator Add or subtract days, months, and years from any date. Find what date it will be
Time Calculator Add or subtract hours and minutes from any time of day. Great for scheduling, sh
Hours Calculator Calculate the number of hours and minutes worked between a start time and end ti
Days Between Dates Calculator Find the exact number of days, weeks, and months between two dates. Useful for p
Time Zone Converter Convert a time from one time zone to another. Supports UTC offsets for all major
Countdown Calculator Find out exactly how many days, hours, and minutes remain until any future date.
Work Hours Calculator Calculate net daily work hours from start time, end time, and break. Extrapolate
Time Duration Calculator Convert a duration in hours, minutes, and seconds into total seconds, decimal ho
Unix Timestamp Converter Convert a Unix epoch timestamp to a human-readable date, or convert a date to a
Elapsed Time Calculator Calculate elapsed time between two times with AM/PM. Handles overnight crossing,
Week Number Calculator Find the ISO week number for any date. Includes US week numbering, fiscal week,
Age in Days Calculator Calculate your total days alive, hours, minutes, heartbeats, and fun facts. Find
Workday Calculator Count business days between two dates, excluding weekends and holidays. Add busi
Leap Year Calculator Check if any year is a leap year, list all leap years in a range, calculate leap
Gestational Age Calculator Calculate how many weeks pregnant you are from LMP, ultrasound CRL, or IVF trans
Sunrise Sunset Calculator Calculate sunrise time, sunset time, daylight hours, and solar noon for any loca
Timezone Overlap Calculator Find overlapping working hours between time zones. Compare 2 or 3 time zones and
Pay Date Calculator Find your next payday for weekly, bi-weekly, semi-monthly, and monthly pay sched
Date of Birth Calculator Find your birth year or birth date from your current age. Enter age in years, ye
Julian Date Converter Convert Gregorian calendar dates to Julian Day Numbers (JDN) and Modified Julian
Stopwatch Lap Calculator Calculate average lap time from total race time and number of laps. Analyze indi