Date & Time Calculators
Age, date difference, countdown, and business day calculators. All handle leap years, month-end edge cases, and varying month lengths correctly. Free, no signup.
Available now
Exact age in years, months, and days from any birth date — plus next birthday countdown.
Days, weeks, and months between any two dates — with estimated working days.
Coming soon
Live countdown to any future date or event — birthdays, deadlines, launches.
Working days between dates excluding weekends and country-specific public holidays.
Weekly timecard hours and pay including overtime at custom rates.
Frequently asked questions
Does the age calculator handle leap years?
Yes. The age calculator uses calendar arithmetic — it counts full years by comparing the month and day, then counts remaining months, then remaining days. Leap years are handled correctly so February 29th birthdays get the right result.
How is the date difference calculator different from just subtracting dates?
Plain subtraction gives you total days. Our date difference calculator also breaks the result down into years, months, and days (accounting for months of different lengths), and estimates working days by removing weekends — giving you a more useful answer for project planning.
Will the business days calculator support public holidays?
Yes — the next version will include built-in public holiday lists for the US, UK, India, UAE, Saudi Arabia, Australia, Canada, and the EU, with an option to add custom holidays.
Need a calculator we haven't built yet?
Email [email protected] with the specific tool you need. Requested calculators ship within 7 days.