Date & Time
Age calculator, days between dates, time calculator, stopwatch, countdown and pomodoro timers, time zones and alarm clock.
Age CalculatorCalculate your exact age in years, months and days, plus total days lived and the countdown to your next birthday.
Days Between DatesCount the days, weeks, months and years between two dates, including business days.
Date CalculatorAdd or subtract days, weeks, months or years from a date to find the resulting date.
Time CalculatorCalculate the hours and minutes between two times, and add or subtract durations.
Online StopwatchFree online stopwatch with lap times, accurate to the hundredth of a second, with keyboard shortcuts.
Countdown TimerSet an online countdown timer with an alarm sound. Use quick presets or set any duration.
Pomodoro TimerBoost focus with the Pomodoro technique: 25-minute work sessions with short and long breaks.
Time Zone ConverterConvert time between time zones and see the current time in cities around the world.
Online Alarm ClockSet an online alarm clock that rings in your browser at the time you choose.
What Week Is It? Week NumberSee the current week number instantly, or find the week number of any date. Supports ISO 8601 (Monday start) and US (Sunday start) weeks, with a full list of the year's weeks.
Day of the Week CalculatorFind out which day of the week any date falls on — like the day you were born — plus its week number and day of the year.
Hijri Date ConverterConvert Gregorian dates to the Islamic Hijri calendar and back, using the Umm al-Qura calendar, with a moon-sighting adjustment for your country.
Military Time ConverterConvert military (24-hour) time to standard 12-hour AM/PM time and back, see how it is spoken, and use the full military time chart.
Time to Decimal ConverterConvert hours and minutes to decimal hours for timesheets and payroll — and decimal hours back to hours and minutes — with an optional pay calculation.