Bar Mitzvah Calculator: Find the Exact Date in Seconds
The world’s most trusted bar mitzvah calculator and bat mitzvah calculator — used by rabbis, educators, and families globally in 2025. This bar mitzvah calculator instantly converts any Gregorian birth date to the correct Hebrew anniversary, Torah portion, and ideal celebration date.
How the Bar Mitzvah Calculator Works
Our bar mitzvah calculator and bat mitzvah calculator use:
- Accurate Hebrew Calendar: 19-year Metonic cycle
- Age 13 (boys) / 12 (girls): On Hebrew birthday
- Torah Portion: Weekly parsha for that Shabbat
- Celebration Options: Exact day, Shabbat, or Thursday
Bar Mitzvah Calculator for Boys
Enter birth date → get 13th Hebrew birthday, Shabbat aliyah date, and parsha. Perfect for synagogue planning.
Bat Mitzvah Calculator for Girls
Age 12 on Hebrew birthday. Option for Thursday morning service or Shabbat Bat Mitzvah.
Bar Mitzvah Calculator – Torah Portion Guide
<> The bar mitzvah calculator shows the exact parsha. Example:- Born 15 Nisan 5765 → Bar Mitzvah on 15 Nisan 5778 → Parshat Achrei Mot
Why This Bar Mitzvah Calculator Is #1 Globally
- Supports 1900–2030 birth dates
- Hebrew & Gregorian sync
- Torah portion included
- Shabbat/Thursday options
- No login, 100% private
Bar Mitzvah Calculator Pro Tips
- Book synagogue 12–18 months early
- Shabbat morning is most common for boys
- Thursday is popular for Bat Mitzvah
- Order tallit 3 months before
Frequently Asked Questions (FAQ)
When is a child considered Bar/Bat Mitzvah?
At the exact moment of the 13th (boy) or 12th (girl) Hebrew birthday — even without ceremony.
Can I celebrate on a different day?
Yes. Many choose nearest Shabbat or Thursday for convenience.
Does leap year affect the date?
Yes. The bar mitzvah calculator automatically adjusts for Adar I/II in leap years.