Days Until Calculator

Count down to any date — a launch, deadline, birthday, holiday, or trip — or count up from a date that has already passed.

How do you count the number of days until a date?

To count days until a date, subtract today's date from the target date. The result is how many full days remain. If the target is already past, the same subtraction shows days since. The calculator below counts down to any date, and lets you change the start date or name the event.

Result

Days until: 0
Weeks & days: 0w 0d
Target day of week: Tuesday

your target date is today (Tuesday, August 4, 2026).

How to count days until a date

Pick a target date — a deadline, holiday, trip, or birthday.
Optionally change the start date (today by default) for a future countdown.
Optionally name the event for a clearer copied summary.
Turn on Include target date to count the day itself.
Copy the summary to share or save.

Example

From today, there are typically 30+ days until a month-out deadline. If the target has passed, Calcadian shows how many days ago it was.

Date Difference CalculatorCount days, weeks, months, and years between two dates.Open Add or Subtract Days CalculatorFind a future or past date by adding or subtracting time.Open Age CalculatorCalculate exact age from any date of birth.Open Weeks Between Dates CalculatorCalculate total weeks, remaining days, and decimal weeks between two dates.Open Week Number CalculatorFind the ISO week number for any date.Open

Frequently asked questions

How does Calcadian count days until?

It counts whole days from the start date (today by default) to the target date. If the target is in the past, you'll see “days since” instead.

Does it include the target day?

Only when you turn on “Include target date”. Off by default — most countdowns mean “days before it arrives”.

Can I use this for birthdays or trips?

Yes. Name your event so the copied summary reads naturally.

Why does the result change at midnight?

Calcadian compares calendar days. As soon as your local date rolls over, the count steps down by one.

Can the start date be in the future?

Yes. Set a future start date to plan a countdown that begins later.

Want this calculation in your inbox?

Get weekly date-math tips and be the first to know when Pro API access launches.

No spam. Unsubscribe anytime.

Put this calculator on your site

Free iframe embed — no signup, no tracking.

Embed this

Calcadian calculators are for general planning and informational use. Please verify critical deadlines, legal, payroll, tax, HR, or official requirements with the relevant authorities or a qualified professional.