Age, date math, timezones, countdowns, and work hours — every calculation runs privately in your browser.
Calculate exact age in years, months, and days from date of birth.
Find days, weeks, months, and years between two dates.
Add or subtract days from any date to get a future or past date.
Count weekdays (Mon–Fri) between two dates, excluding weekends.
Convert a date and time across IST, UTC, US, Europe, and Asia zones.
Live countdown to any target date in days, hours, minutes, and seconds.
Find the ISO week number for any date.
See which day of the week any date falls on.
Calculate hours and minutes between two times.
Convert dates to ISO, US, EU, India, long format, and Unix.
Check if any year is a leap year with the standard rules.
Calculate billable hours from clock in, clock out, and break time.
Add or subtract days from any date to get a future or past date.
Calculate exact age in years, months, and days from date of birth.
Count weekdays (Mon–Fri) between two dates, excluding weekends.
Live countdown to any target date in days, hours, minutes, and seconds.
Find days, weeks, months, and years between two dates.
Convert dates to ISO, US, EU, India, long format, and Unix.
See which day of the week any date falls on.
Check if any year is a leap year with the standard rules.
Calculate hours and minutes between two times.
Convert a date and time across IST, UTC, US, Europe, and Asia zones.
Find the ISO week number for any date.
Calculate billable hours from clock in, clock out, and break time.