Birthday Countdown Calculator
Days, weeks and months until your next birthday. Results update as you type.
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Results
Fill in the details above and the results appear here.
About the Birthday Countdown Calculator
Find out exactly how many days are left until your next birthday, how old you will turn, and what day of the week it falls on. It also shows your current age and the number of days you have lived.
Use it for planning a party, a gift or a trip, or just to see how close the big day is.
The calculation runs in your browser, so the numbers you enter are not uploaded or stored.
Birthday Countdown Calculator example
Date of birth: 1995-08-24
Count from: 2026-01-15Days until your next birthday: 221 days
Next birthday: Monday, 24 August 2026
You will turn: 31 years
Time to go: 7 months, 9 days
Weeks and days: 31 weeks, 4 days
Your age now: 30 years, 4 months, 22 daysHow it is calculated
The calculator takes this year’s birthday and, if it has already passed, moves to next year’s. It then counts the whole days between today and that date. People born on 29 February are counted on 28 February in years that are not leap years.
Next birthday = this year’s birthday, or next year’s if it has passedDays left = next birthday − todayTurning = next birthday year − birth year29 Feb birthdays are counted on 28 Feb in non-leap years
How to use the Birthday Countdown Calculator
- Fill in the fields above. Required fields are marked, optional ones can be left blank and fall back to the defaults described on this page.
- Use “Try an example” to see a worked case, then replace the numbers with your own.
- Read the results as you type. The large card is the main answer and the smaller cards are the related figures.
- Copy a single value or everything, or share a link that keeps your inputs.
Birthday Countdown Calculator FAQ
How does the birthday countdown calculator work?
The calculator takes this year’s birthday and, if it has already passed, moves to next year’s. It then counts the whole days between today and that date. People born on 29 February are counted on 28 February in years that are not leap years.
Does it count today if it is my birthday?
No. If your birthday is today, the answer is 0 days and the page shows a short greeting.
What happens for a 29 February birthday?
In non-leap years the birthday is shown on 28 February. Some countries legally treat it as 1 March, so check local rules if the date matters.
Is this birthday countdown calculator free and private?
Yes. It is free with no sign-up, and the calculation happens on your device, so your numbers are never sent to a server.
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