Date & Time Tools
Convert timestamps, compare time zones, calculate age, and measure durations. Built for quick scheduling and developer jobs.
Unix Timestamp Converter
Convert epoch seconds or milliseconds to readable dates — and the other way around.
Date & TimeInstantAge Calculator
Find exact age in years, months, and days — plus days until the next birthday.
Date & TimeInstantTime Zone Converter
Pick a date and time in one zone and see the same moment across other cities.
Date & TimeInstantTime Difference Calculator
See how many hours and minutes separate two time zones on a given date.
Date & TimeInstantDate Calculator
Add or subtract time from a date, or count calendar and business days between two dates.
Date & TimeInstantWeek Number Calculator
Get the ISO week number and weekday for any calendar date.
Date & TimeInstantCountdown / Days Until
See how many days remain until an event — or how long since it passed.
Date & TimeInstantHours Calculator
Find elapsed hours between a start and end clock time — overnight shifts included.
Date & TimeInstantTime Calculator
Add or subtract hours, minutes, and seconds from any clock time.
Date & TimeInstantTime Duration Calculator
Measure elapsed time between two date-times down to the second.
Date & TimeInstantWork Hours Calculator
Get net shift hours after unpaid breaks — in hh:mm and decimal hours.
Date & TimeInstant
How these tools work
Date math runs in your browser using JavaScript Date APIs. Time zone results follow your browser’s zone data; DST edge cases can vary. Read our Privacy Policy.
Who these tools are for
Developers debugging epochs, remote teams comparing zones, and anyone counting days until an event.
FAQ
Are time zone results always exact?expand_more
They depend on browser time zone data. Double-check critical meetings around DST changes.
Is the work hours tool payroll software?expand_more
No. It helps estimate hours between clock-in and clock-out. Confirm with your employer’s rules.
Do I need an account?expand_more
No.
Looking for something else? Browse all tools · Read the blog.