Free Date & Time Calculators
Countdowns, business days, work hours, and timezone offset conversion.
- Countdown and days-until tools
- Business-day and timesheet helpers
- Add/subtract dates and offset conversion
9 tools in this category
Age Calculator
Exact age from date of birth
OpenDate Difference
Days between two dates
OpenWeek Number
ISO week of the year
OpenCountdown Calculator
Days, hours, and minutes remaining until a target date
OpenBusiness Days Calculator
Weekdays between two dates (excludes weekends)
OpenAdd / Subtract Dates
Add or subtract days, weeks, or months from a date
OpenWork Hours Calculator
Hours worked between two times, with break deduction
OpenTimezone Offset Converter
Convert a local time between UTC offsets
OpenDays Until Calculator
Countdown in days to a future event date
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