DATE CALCULATOR
Date & countdown calculator
Dates N days from now, days between dates, countdowns and 100-day anniversaries, and your exact age — all in one place. Saved countdowns show the days left every time you visit.
Free · No sign-up
My countdowns
Days before / after
Days between
Age calculator
Age is calculated in full years from your birth date.
How to use Date & countdown calculator
- Add a countdown, or switch to the date calculator or age calculator.
- Pick dates — results appear instantly.
- Save countdowns to see the remaining days next time.
Frequently asked questions
Is the target day D-0 or D-1?
The target day itself is D-day (D-0); the day before is D-1.
Do anniversaries count the first day?
Relationship anniversaries usually count the first day as day 1, so day 100 is the start date + 99 days. Turn on 'Count the start date as day 1' for that.
Are my countdowns synced across devices?
Countdowns are saved only in this browser. Add them again on your other devices.