Calculators & timers.

Live countdown to any future date or time. Quick presets for New Year, Christmas, and more.

Set a duration and get an audible alert when it ends. Pomodoro preset included.

Count up with millisecond precision and lap recording. Keyboard shortcuts.

Your exact age in years, months, days, hours. Day of the week you were born.

Days, weeks, months, business days between any two dates.

Add or subtract years, months, weeks, days from a date. Optional weekend skip.

ISO 8601 week numbers — bidirectional lookup between dates and week numbers.

Clock-time arithmetic: elapsed between two times, or end time from start + duration.

Weekly work hours across shifts with break deduction and pay estimate.