Ages, date differences, workdays, schedules and everyday time calculations. All tools are free and work directly in your browser.
Popular tools people often start with in this category.
Calculate age in years, months and days from a birth date to a selected date.
Add or subtract a chosen number of calendar days from any date.
Calculate weekly work hours and gross pay from daily clock-in, clock-out and unpaid break times.
Browse the complete set of tools in this category.
Add or subtract a chosen number of calendar days from any date.
Calculate age in years, months and days from a birth date to a selected date.
Count weekdays between two dates, excluding Saturdays and Sundays.
Find the weekday for any valid calendar date.
Count the number of calendar days between two dates.
Count calendar days from a starting date to a future or past target date.
Convert decimal hours to hours and minutes.
Find elapsed hours and minutes between two clock times, including overnight intervals.
Convert hours and minutes into decimal hours for timesheets and payroll calculations.
Calculate completed calendar months plus remaining days between two dates.
Calculate weekly work hours and gross pay from daily clock-in, clock-out and unpaid break times.
Find elapsed time between a start time and end time, including overnight periods.
Convert the calendar-day difference between two dates into weeks and remaining days.
Calculate paid work hours from start time, end time and an unpaid break.
Calculate how much time remains until a future date and time, or how much time has elapsed since a past target.
Convert a date and time between common world time zones using browser-supported IANA time zone rules.
Ages, date differences, workdays, schedules and everyday time calculations. Use these tools for quick estimates, comparisons and everyday planning.
Explore focused calculator clusters with related tools, formulas, examples and long-tail guides.
Learn the method behind popular calculators in this category.
Counting business days sounds simple until weekends, holidays and inclusive date rules enter the picture. A clear method helps when planning deadlines, shipping windows, work schedules and response periods.
Read guide →Work HoursA time card turns clock-in and clock-out times into paid hours. The arithmetic is simple once the times are placed on a consistent clock and unpaid breaks are handled correctly.
Read guide →Adding 30 calendar days advances the date by 30 days regardless of weekends. Counting 30 business days skips weekends and may also depend on which holidays you choose to exclude. Work-hour totals are another type of date calculation: 8:00 AM to 4:30 PM is 8 hours 30 minutes elapsed, but becomes 8 paid hours after a 30-minute unpaid break. Choose a date tool for deadlines and a time-card tool for elapsed and paid hours.