Date & Time
Age, durations, time zones, and date arithmetic.
9 calculators in this category.
- Age Calculator
Calculate exact age in years, months, days, hours, and minutes from any birthdate. Also shows total days lived and next birthday countdown.
- Days Between
Calculate exact days, weeks, months, and years between any two dates. Optionally exclude weekends to get business days.
- Business Days
Count business days (Mon-Fri) between two dates, or add a number of business days to a start date.
- Work Hours
Calculate total hours worked given clock-in and clock-out times, with optional unpaid break deduction.
- Time Zone Converter
Convert any time between two time zones with automatic daylight-saving handling. Built for distributed teams and travel planning.
- Countdown
Live countdown to any future date — days, hours, minutes, and seconds. Great for birthdays, holidays, vacations, and project deadlines.
- Time Duration
Add or subtract time durations in hours, minutes, and seconds. Useful for video editing, project tracking, and time math.
- Week Number
Find the ISO 8601 week number and day of year for any date. Critical for European business, project planning, and SQL date queries.
- Date Add / Subtract
Add or subtract any number of days, weeks, months, or years to a starting date. Returns the resulting date.