Time & Date Calculators
Time calculations touch every aspect of daily life and work. Whether you're calculating someone's exact age, counting days until an event, converting between time zones for international meetings, or tracking work hours for payroll, these tools handle the complexities of calendars, leap years, and time zone differences. Our 24 time and date calculators help with everything from simple age calculations to specialized tools like Julian date converters and moon phase trackers.
All Time & Date Calculators
Age Calculator
Calculate exact age in years, months, and days from any birth date. Shows upcoming birthday countdown and total days lived for milestone tracking.
Date Calculator
Add or subtract days, weeks, months, or years from any date. Find past and future dates for planning deadlines, contracts, or historical research.
Days Between Dates Calculator
Calculate the exact number of days between two dates. Shows total days, weeks, months, and years for project planning or duration tracking.
Time Zone Converter
Convert times between any time zones worldwide. Essential for scheduling international calls, meetings, and coordinating across global teams.
Work Hours Calculator
Calculate total work hours from start and end times. Supports multiple entries, break deductions, and exports for timesheet and payroll processing.
Time Card Calculator
Process weekly time cards with daily clock-in/out entries. Calculates regular hours, overtime, and total hours for payroll submission.
Countdown Calculator
Calculate days, hours, minutes until any future event. Perfect for vacation planning, project deadlines, or counting down to special occasions.
Business Days Calculator
Count business days excluding weekends between two dates. Option to exclude holidays for accurate shipping estimates and deadline calculations.
Julian Date Calculator
Convert between Julian date (day of year) and calendar date. Used in astronomy, military applications, and food industry expiration dating.
Week Number Calculator
Find the ISO week number for any date. Useful for business reporting, inventory management, and European business scheduling conventions.
Julian Date Converter
Convert Julian Day Numbers used in astronomy to standard calendar dates. Calculate Julian dates for any historical or future date.
Unix Epoch Converter
Convert Unix timestamps to readable dates and vice versa. Essential for developers working with database timestamps and log files.
Time Addition Calculator
Add multiple time durations together. Useful for totaling project hours, workout times, or any task tracking requiring time summation.
Meeting Time Finder
Find optimal meeting times across multiple time zones. Visualize overlapping work hours for international team scheduling.
Age Difference Calculator
Calculate the exact age difference between two people or dates. Shows difference in years, months, and days.
Birthday Calculator
Find interesting facts about any birthday including day of birth, zodiac signs, birth year animal, and countdown to next birthday.
Zodiac Sign Calculator
Determine Western zodiac sign for any birth date. Shows sign dates, element, ruling planet, and compatibility information.
Chinese Zodiac Calculator
Find Chinese zodiac animal and element for any birth year. Includes personality traits and compatibility with other signs.
Moon Phase Calculator
Calculate the moon phase for any date. Shows illumination percentage, phase name, and next major phase dates.
Sunrise Sunset Calculator
Calculate sunrise and sunset times for any location and date. Includes civil, nautical, and astronomical twilight times.
Day of Year Calculator
Find which day number of the year any date falls on (1-365/366). Useful for tracking annual progress and scheduling.
Leap Year Calculator
Determine if any year is a leap year. Shows next and previous leap years and explains the leap year rules.
Working Days Left Calculator
Calculate working days remaining in the month, quarter, or year. Helps with project planning and deadline management.
Retirement Age Calculator
Calculate your retirement date based on target age. Shows years, months, and days until retirement for planning purposes.
Which Calculator Should You Use?
Planning around dates? The Age Calculator finds exact ages, while the Countdown Calculator tracks days until events. The Date Calculator adds or subtracts from any date.
Working across time zones? Use the Time Zone Converter for quick conversions or the Meeting Time Finder for scheduling international calls.
Tracking work hours? The Work Hours Calculator handles daily calculations while the Time Card Calculator processes full weekly timesheets.
Business scheduling? The Business Days Calculator excludes weekends and holidays. The Week Number Calculator helps with ISO week-based reporting.