Free Date & Time Tools
Calculate ages, date differences, work hours, and time zones, and convert Unix timestamps — fast and accurate.
Age Calculator
Calculate exact age in years, months, and days.
Date Difference Calculator
Count the days, weeks, and months between two dates.
Unix Timestamp Converter
Convert Unix timestamps to dates and back.
Timer & Stopwatch
A simple online countdown timer and stopwatch.
Time Zone Converter
Convert times between any two time zones.
Hours Calculator
Add up work hours from start and end times.
Date Calculator
Add or subtract days, weeks, months, or years from a date.
Day of the Week Calculator
Find the weekday for any date.
Day Counter
Count the days to or from a date.
Time Duration Calculator
Find the duration between two date-times.
Time Calculator
Add or subtract hours, minutes, and seconds.
Time Card Calculator
Add up work hours from a time card.
About these date & time tools
Free date and time tools for the questions people ask every day — calculate your exact age, the number of days between two dates, work hours from a time card, and the time in another time zone (with daylight saving handled automatically). Convert Unix timestamps to readable dates, run a countdown timer or stopwatch, and more. Fast, accurate, and free, with no sign-up.
Frequently asked questions
How do I count the days between two dates?
Use the Date Difference Calculator — pick a start and end date and get the exact days, weeks, and months between them.
Do the time zone tools handle daylight saving?
Yes — the Time Zone Converter uses real IANA time zone rules for the exact date you choose, so DST is always applied correctly.
Can I calculate work hours here?
Yes — the Hours Calculator adds up clock-in/clock-out times (including overnight shifts) and gives the total in hours and decimal for payroll.