Free Online
Date & time
Accurately track your life's most precious moments with our advanced chronological calculators. Find your exact age down to the second, calculate exact days until birthdays, or precisely determine working days between dates. Built for speed and accuracy—no sign-ups required. Works seamlessly on any mobile or desktop browser.
All Date & time
Browse with filtersAge Calculator
Exact age with live countdown, Islamic Hijri date and 12+ life metrics.
Birthday Countdown Calculator
Days until your next birthday; optional age on that day from full DOB.
Business Days Calculator
Count Mon–Fri between dates or add N business days to a start date.
Date Add & Subtract
Add or subtract days, weeks, months or years from any date — ISO week & ordinal.
Date Difference Calculator
Exact gap between two dates — years, months, days, working days and more.