Half Birthday Calculator

Enter your exact date of birth to know your Half birthday, and many more!

Select Your Date Of Birth

Created by Helen Stark

Helen Stark
Helen Stark

Student of Harvard university, she loves to observe new things about society, she studies Wikipedia more and learns about quantum physics on the internet. She loves dancing and singing songs.

Reviewed by Nick Walker

Nick Walker
Nick Walker

Done PHD of nuclear physics from the University of Pennsylvania. He is always seeking ways to explain science in easy terms. Moreover, he loves coffee & its beans more than his girlfriend (not at all).

Calculate your next half birthday date and weekday with this half birthday calculator. With that, the tool also tells you how many days are left in your first and third quarter birthdays so you may celebrate these days with great enthusiasm.

Instantly figure out the day at which you may become half a year older than you are on your recent birthday.

Working of Half Birthday Calculator:

The half birthday finder is super easy to operate. What it requires to function includes:

What to Do?

  • Just enter the year, month, annd day of your birth in chronological order
  • Tap Calculate

What You Get?

  • Next half birthday date & weekday. Also, days remaining till that date.
  • Exact dates, weekdays, and days left in next 1st and 3rd quarter birthdays

Start using the tool and plan to make your half birthday a mesmerizing time of life!

What Is a Half Birthday?

If you love getting presents from your dear ones, you might be interested in knowing when is my half birthday.

“Your half birthday is the day that comes approximately six months after the actual birthday”

Over decades, people have new surprising ways to celebrate their half birthdays. With the passing of time, everyone loves celebrating half birthday and so do you. This is why we have developed this half birthday calculator to do this kind of math for you in seconds.

Let’s guide you on how to use our tool!

Related:For those who are willing to calculate their next full birthday, tap on the birthday calculator and land on the relevant page to initiate your birthday maths.

Whens My Half Birthday?

So far, you have understood the half birthday meaning and the use of a calculator, you can use it to figure out when your next half birthday is. However, if your goal comes up with the manual calculations, continue reading!

Way 01:

  • You can simply add or subtract 6 months to calculate your next and previous half birthdays, respectively


Next Half Birthday = actual birthday date + 6 months

Previous Half Birthday = actual birthday date - 6 months

Way 02:

Divide the number of days in a year and add or subtract to figure out dates accordingly


Number of days in a year = 365.5 (According to the Gregorian Calendar)

So what is half of 365? Let’s solve it first!

365.25/2 = 182.625 days

Next Half Birthday = actual birthday date + 182.625 days

Previous Half Birthday = actual birthday date - 182.625 days

Half Birthday Table:

Get through the following table to figure out your next and previous half birthdays:

Previous Half Birthday (Years) Actual Birthday (Years) Next Half Birthday (Years)
- 0 0.5
0.5 1 1.5
1.5 2 2.5
2.5 3 3.5
4.5 4 5.5
4.5 5 5.5
5.5 6 6.5
6.5 7 7.5
7.5 8 8.5
8.5 9 9.5
9.5 10 10.5
10.5 11 11.5
11.5 12 12.5
12.5 13 13.5
13.5 14 14.5
14.5 15 15.5
15.5 16 16.5
16.5 17 17.5
17.5 18 18.5
18.5 19 19.5
19.5 20 20.5
20.5 21 21.5
21.5 22 22.5
22.5 23 23.5
23.5 24 24.5
24.5 25 25.5
25.5 26 26.5
26.5 27 27.5
27.5 28 28.5
28.5 29 29.5
29.5 30 30.5

Frequently Asked Questions:

Is Your Half Birthday Always The Same?

If it is about the date, yes! But keep in mind the weekday may be the same or not. To know exactly, use our half birthday calculator and get answers in front of you in mere seconds.

How Old Am I On My Half Birthday?

On your half birthday, you are exactly 6 months older than your recent birthday.

Are Half Birthdays Important?

If you celebrate a half birthday, you get an extra chance to come up with reasons to party, which is one of the benefits of doing so.

Even if not everyone celebrates their half birthdays, doing so with your kids will demonstrate to them that there are always good reasons to throw a party if you simply look for them.

What Is The Golden Birthday Age?

Golden birthday age refers to the birthday date on which you get old the same number of years.

For instance, if you are celebrating your 26th birthday on the 26th of a month, you might be a golden birthday boy/girl.

Whens My Half Birthday Compared to Celebrities?

Your Birthday Date Your Next Half Birthday Celebrities You Share Your Half Birthday With
January 1 July 1 Poppy, Acrello, Ryan Grantham Nia Lovelis, Colin Morgan. Tank, Martie Blair, Diamond White
January 15 July 15 Martin Luther King, Jr., Ash Kash Pitbull, Dove Cameron, Skrillex Grace VanderWaal, Ben Shapiro
January 31 July 31 Justin Timberlake, Mallory Mahoney Minnie Driver, Josh Richards Jackie Robinson, Joel Courtney
February 1 August 1 Harry Styles, Rayhart Adams Michael C. Hall, Clark Gable, Jihyo Lisa Marie Presley, Jessica Baio
February 15 August 15 Megan Three Stallion, Dede 3X Zachary Gordon, Birdman Lil Poopy, Ross Duffer
February 28 August 28 Rudy Mancuso, LunarEclipse Jason Aldean, Dream Doll Adam McArthur, Jonathan Daviss
February 29 August 29 Korede Bello, Ja Rule Tony Robbins, Dinah Shore Mark Foster, Jessie Usher
March 1 September 1 Justin Bieber, Kesha, Philza Don Lemon, Sapnap Sabrina Quesada, Jensen Ackles
March 15 September 15 Lil Dicky, william, Derkslurp Connor Ball, Eva Longoria Paul Pogba, Alia Bhatt
March 31 October 1 Tait Blum, Christopher Walken Ewan McGregor, Josh Beauchamp Vice Ganda, Noah Urrea, Powfu
April 1 October 1 Asa Butterfield, Debbie Reynolds Troy Baker, Randy Orton Milly Alcock, Kid Ink, Logan Paul
April 15 October 15 Luis Fonsi, Cooper Barnes Emma Watson, Seth Rogan Cody Christian, Jacquees
April 30 October 30 Travis Scott, Lil TJ, Bella Blu Gal Gadot, Kirsten Dunst Ana de Armas, Dianna Agron
May 1 November 1 Charli D'Amelio,YNW Melly Lizzy Greene, Jamie Dornan James Murray, Tim McGraw
May 15 November 15 Sarah Hunt, Role Model, Birdy Zara Phillips, SmokePurpp Mollee Gray, Andy Murray
May 31 December 1 Kouvr Annon, Normani CupcakKe, Brooke Shields
June 1 December 1 Tom Holland, Heidi Klum, Notch Marilyn Monroe, Morgan Freeman Amy Schumer, Willow Shields
June 15 December 15 Sissy Sheridan, Courtney Cox Ice Cube, Mohamed Salah Neil Patrick Harris, Dani Calleiro
June 30 December 30 Cheryl Ann Tweedy, TinaKitten Michael Phelps, Mike Tyson
July 1 January 1 Jack Avery, Princess Diana Brynn Rumfallo, Tate McRae
July 15 January 15 Abbie Herbert, Ariana Lee Bonfiglio, Cora Bennett Gabriel Iglesias, Julio Pena
July 31 January 31 Lil Uzi Vert, Angelica Hale J.K. Rowling, Hayden Haas
August 1 February 1 Christopher Sturniolo, Jason Momoa, Leon Thomas III Delina Hillock, Mia Stammer Matthew Sturniolo
August 15 February 15 Chief Keef, Ben Affleck Joe Jonas, Jennifer Lawrence
August 31 March 1 Jason Maybaum, Chris Tucker Jeff Hardy, Malinda Panton
September 1 March 1 Jungkook, Dr. Phil, Sam Hurley Zendaya, Olivia Haschak
September 15 March 15 Prince Harry, Felix Lee, Tom Hardy Jenna Marbles, Sommer Ray
September 30 March 30 Chantel Jeffries, Levi Miller Trevi Moran, Maddie Ziegler
October 1 April 1 FGTeeV Chase, Julie Andrews Sage Rosen, Luna Blaise Olivia Dunne, Brie Larson
October 15 April 15 Malu Trevejo, Daniel Gizmo Billy Unger, Bailee Madison AllAroundAudrey, Zephan Clark
October 31 May 1 Christopher Columbus, ItsFunneh Willow Smith, Frank Iero Autumn Monique, Danielle Rose Russell, Marcus Rashford
November 1 May 1 GeorgeNotFound, NLE CHOPPA Paige Hyland, Jayden Bartels Macei, Lil Peep, Anthony Ramos
November 15 May 15 Jeffree Star, Jenny Popach Shailene Woodley, MatPat Jackson Passaglia, HyunJin
November 30 May 30 Jorge Garay, Emily Skinner Ben Stiller, Chrissy Teigen Trinity Fatu, Ian Hecox, Steve Aoki
December 1 June 1 Zoe Kravitz, Corinna Kopf Tyler Joseph, Janelle Monae Robert Irwin, Vance Joy, Ella Gross
December 15 June 15 Antonio Garza, Sicily Rose Maude Apatow, Jeff Wittek Skyler Aboujaoude, Maya Henry
December 31 July 1 Brooklyn McKnight, Hunter Schafer, Max Mills, Harvey Mills Gabby Douglas, Psy, TanqR


Wikipedia: Half-birthday