Half Birthday Calculator
Find the date exactly six months from your birthday.
Celebrate the midpoint
A half birthday falls six months from your real one, a fun marker that is popular for children whose birthdays land near a holiday. This tool finds the exact date.
Born on the 11th of August, your half birthday is the 11th of February. The tool also counts the days until your next one, so you know how far off the celebration is.
Fun and private
The calculation runs in your browser, so your birth date is never uploaded.
Frequently Asked Questions
What is a half birthday?
The date six months from your birthday — a fun midpoint that some like to celebrate, especially for children with birthdays near holidays.
How is it calculated?
It adds six months to your birth month and day, rolling into the next year as needed.
Does it show days away?
Yes. It also counts the days until your next half birthday.
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