Jewish Birthday Calculator

Find your Jewish birthday fast. Enter your Gregorian date, get your Hebrew date instantly. Simple and accurate.

Share Tweet WhatsApp

Tool Icon Jewish Birthday Calculator

Jewish Birthday Calculator

Convert your Gregorian birth date to the Hebrew calendar and find upcoming birthdays

Select Your Birth Date
The Jewish day begins at sunset of the previous evening.
Calculation History:
No calculation history yet
Jewish Calendar Rules:
Lunisolar Calendar

Based on moon phases but adjusted to the solar year.

Sunset Rule

Days begin at nightfall, meaning Hebrew dates change at sunset.

Adar Leap Months

Leap years contain Adar I and Adar II to keep Pesach in spring.

Bar/Bat Mitzvah

Calculated strictly by the Hebrew birthday reached.

Yahrzeits

Anniversaries are observed on the Hebrew death date.

Tishrei Start

The Hebrew year numbering changes on Rosh Hashanah.

How to Use:
  1. Enter your Gregorian birth date in the selector above.
  2. Select whether you were born before or after sunset (if known).
  3. Click "Calculate Jewish Birthday" to see your Hebrew birth details.
  4. The results will include your Hebrew date and the next Gregorian date for your Hebrew birthday.

Related Tools

Adsense Calculator
Adsense Calculator
Age Calculator
Age Calculator
Percentage Calculator
Percentage Calculator
Average Calculator
Average Calculator
Confidence Interval Calculator
Confidence Interval Calculator
Sales Tax Calculator
Sales Tax Calculator

About This Tool

So, you want to figure out when your Jewish birthday is? Yeah, it’s not as straightforward as it sounds. The Jewish calendar is lunar-solar, which means it doesn’t line up neatly with the Gregorian calendar we use every day. One year your birthday might fall in March, the next in February—or even January. Confusing? Absolutely. That’s where this Jewish Birthday Calculator comes in.

I built this because I kept forgetting when my own Hebrew birthday was. My mom would remind me, “It’s next week!” and I’d be like, “Wait, what? How?” Turns out, converting dates between calendars isn’t something most people have memorized. This tool does the heavy lifting so you don’t have to.

Just plug in your birth date (Gregorian), and it spits out the corresponding Hebrew date. Simple. No apps to download, no sign-ups, no nonsense. It’s just a quick, honest answer to a question that trips up way more people than you’d think.

Key Features

  • Converts any Gregorian birthday to the Hebrew (Jewish) calendar date
  • Works for past, present, and future years—so you can plan ahead
  • Shows the Hebrew month and day, plus the year in the Jewish calendar
  • No data stored—your info stays on your device
  • Free to use, no ads, no tracking
  • Works offline once loaded (great for synagogues or family gatherings with spotty Wi-Fi)

FAQ

Q: Why does my Jewish birthday change every year on the regular calendar?
A: Because the Jewish calendar is based on lunar months and adds an extra month every few years to stay in sync with the seasons. That means Hebrew dates shift relative to the Gregorian calendar. Your Hebrew birthday stays the same—it’s just the Gregorian date that moves around.

Q: Can I use this for someone born before 1900?
A: Technically yes, but with a caveat. The calculator uses standard conversion algorithms, which are reliable from around 1900 onward. For earlier dates, historical calendar variations and regional differences can make things fuzzy. If you’re researching family history, double-check with a historian or rabbi.