⏰Time Tools
Time tools for the date arithmetic that recurs constantly in planning and project management: days between two dates, workdays excluding weekends and holidays, countdowns to a deadline, time zone conversion, and the smaller calculations around overtime and time-and-a-half pay. Dates are easy to get wrong by one because of inclusive-versus-exclusive counting and time-zone boundaries, so the tools here state which convention they use and let you switch when the answer matters. The common assumption that causes the most trouble is that subtracting two timestamps gives you the right number of business days; weekends, public holidays, and partial start and end days all need to be handled explicitly, which is why the Workdays Between Dates Calculator takes a holiday-list input and surfaces both the raw day count and the working-day count. If you are new to the category, start with the Days Between Dates Calculator for any general-purpose span (vacation length, project duration, age in days), the Workdays Between Dates Calculator when you are planning around a deadline, and the UTC to PST Time Converter when you are coordinating with someone in a different region. The Time and a Half and Overtime Calculator handles the wage math for hourly workers and is the right tool for verifying a paycheck. Date math is one of the more error-prone corners of programming, which is why we standardized on a single underlying date library across the category.
9 tools available
Age Calculator
Subtracts a date of birth from a reference date to return age as years/months/days/weeks plus the same total in years, days, hours...
Days Between Dates Calculator
The Days Between Dates Calculator is a simple tool that helps you find the duration between any two calendar dates.
Duration Calculator
Subtracts a start time from an end time to return the duration in hours/minutes/seconds, plus the same total in hours, minutes, and...
Military Time Converter
Converts between 12-hour AM/PM time and 24-hour military time (HHMM, four digits).
Time Between Two Dates Calculator
Duration between two date-times broken down into years, months, days, hours, minutes, and seconds, plus single-unit totals.
Time Calculator
Adds, subtracts, multiplies, or divides time values entered as H:M:S (2:30:45), decimal hours (2.
Time Zone Converter
Converts a date and time between any two IANA time zones using the browser Intl API, so daylight saving transitions resolve automatically.
UTC to PST Time Converter
Converts dates and times between Coordinated Universal Time (UTC) and Pacific Standard Time (PST) using a fixed offset of UTC minus 8...
Workdays Between Dates Calculator
Calculate the number of workdays or business days between two dates, excluding weekends and optional holidays, to support scheduling and project planning.