Half Birthday Calculator

Find your next half birthday with this calculator. Enter your date of birth and the tool will calculate the date that falls six months after your birthday. Use it for planning celebrations, social media posts, or special surprises.

How To Use the Calculator?

Suppose a baby was born on January 22, 2025!

Enter date of birth in the calculator
Click ‘Calculate’
The calculated Half birthday is on Tuesday, July 22, 2025

Features of Calculator:

Our half birthday calculator exhibits the following features:

✔️ Completely Free: No hidden costs or subscriptions required.

✔️ Universal Compatibility: Works seamlessly on mobile, PC, and tablets.

✔️ Precise Date Calculation: Determines the exact date six months after your birth date.

✔️ Quarter Birthday Tracking: Calculates your 1st and 3rd quarter birthdays, including the remaining days.

✔️ Real-Time Countdown: Displays a live counter showing the time left until your next milestone.

How to Calculate Half Birthday?

You can figure out half birthday by using two slightly different methods:

Method 01:

Add 6 months to your actual date of birth

For Example, If you were born in February, your half birthday will arrive in August.

Method 02:

Add 183 days to your date of birth

For Example, If you were born on March 15, adding 183 days puts your half birthday around September 10th.

Half Birthday Chart:

We have arranged a chart below by which you can estimate exactly the date half of your birthday.

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

What is Half Birthday Relative to the Celebrities?

You can find half birthdays for you, and friends, or find HB for celebrities from our database that is packed below.

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 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

References:

From the Source Wikipedia: Half-birthday, Popular culture

Half Birthday Calculator