Days Until Calculator – How Many Days Until a Date (2025)

Days Until Calculator

Want to know how many days are left until a date? Open our free calculator, set the start date to today, set your event date as the end date, choose inclusive or exclusive, and you’ll see the number of days left. You can also count weekdays only and remove U.S. holidays if you need a business-day countdown. Simple steps below. Updated 2025.

Open the Free Date Calculator

Quick steps

  1. Go to: Free Date Calculator.
  2. Set start date = today.
  3. Set end date = your future date.
  4. Pick a mode:
    • Exclusive = full days before the date (today and the event day aren’t counted).
    • Inclusive = counts today or the event day (whichever applies), so the total is one higher.
  5. (Optional) Turn on workdays only and exclude U.S. holidays for a weekday/business-day countdown.
  6. Click Calculate.
Takeaway: Use Exclusive for “full days left,” and Inclusive if you want the event day to count.

Inclusive vs. Exclusive with a simple example

Let’s say today is Aug 16 and your date is Aug 20.

  • Exclusive: counts 17, 18, 19 → 3 days until.
  • Inclusive: counts 16, 17, 18, 19 → 4 days until.

Pick the version that matches how you’ll talk about the date with others (deadline policies, event invites, etc.).

Summary: The mode is the only reason two people might get numbers that differ by one.

Examples

  • Deadline at end of day: Today → Friday. If Friday should count, use Inclusive.
  • Project planning: Today → launch date. Use Exclusive to see full prep days left.
  • Weekday countdown: Today → future date, turn on workdays only to skip weekends.

Quick tip: Sharing the number? Note your mode (inclusive or exclusive) so everyone matches your count.

Edge cases

  • Date is today: Exclusive = 0; Inclusive = 1. Most people say “0 days until today,” so Exclusive fits better.
  • Date is in the past: That’s “days since.” Use the Days Since Calculator.
  • Leap years: Feb 29 is included automatically if it’s in the range.
Need business days left? Turn on workdays only and also exclude U.S. holidays.

Useful links

Start at the Homepage • Learn About Us • Get help on Contact
Related pages: Days Since Calculator • Days Between Dates • Business Days Calculator

FAQ

Which mode should I use for “days until”?

Exclusive shows full days left before the date. Inclusive counts the event day too. Use the one that matches how you report deadlines.

Can I count only weekdays?

Yes. Turn on workdays only (Mon–Fri). If you also remove U.S. federal holidays, you’ll get true business days left.

Why does my number differ by one from someone else’s?

They probably used the other mode. Exclusive skips both ends; Inclusive counts one of them. Agree on the mode and you’ll match.

Can I get hours and minutes?

This page focuses on calendar days. For sub-day detail, note the dates here and use a time-interval tool for hours and minutes.

Does the tool handle leap years?

Yes. Leap days are included when they fall inside your range—no extra steps needed.

Page last updated: 2025