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Hijri Age Calculator

Find your age in the Islamic Hijri calendar — and discover your lunar birthday

Enter your date of birth

What is the Hijri Age Calculator?

The Hijri calendar is a lunar calendar used by Muslims worldwide for religious observances. Because each lunar year is approximately 354 days — about 11 days shorter than a Gregorian solar year — your age in the Hijri calendar is always slightly higher than your Gregorian age.

This calculator converts your Gregorian date of birth to the Islamic Hijri calendar and computes your exact age in lunar years, months, and days. It also finds your next Hijri birthday and provides fun facts about your life in numbers.

Muslims use Hijri dates for important religious obligations including determining when Zakat is due (after one Hijri year of holding wealth above Nisab), fasting eligibility, and the timing of Hajj and Ramadan.

Why Does My Hijri Age Differ from My Gregorian Age?

The difference comes from the fundamental structure of the two calendars. The Gregorian calendar is solar-based (365.25 days/year), while the Hijri calendar is lunar-based (354.37 days/year). This ~11-day gap compounds each year.

For example, someone who is 30 years old in the Gregorian calendar is approximately 30.9 years old in the Hijri calendar. By age 33 Gregorian, you will be roughly 34 Hijri. The older you are, the larger the difference becomes.

Hijri Birthday (Mawlid)

Your Hijri birthday falls on the same day and month in the Islamic calendar each year, but it shifts approximately 11 days earlier in the Gregorian calendar annually. This means your Islamic birthday will fall in every season over a cycle of about 33 years.

While celebrating birthdays is a matter of scholarly discussion in Islam, knowing your Hijri birth date connects you to the Islamic calendar system used for all religious occasions, from Ramadan to Eid to Hajj.

Frequently Asked Questions

How do I calculate my age in the Islamic calendar?
Enter your Gregorian date of birth in the calculator above. It will convert your birth date to the Islamic Hijri calendar and compute your age based on lunar years of approximately 354 days each.
Why is my Hijri age higher than my Gregorian age?
The Hijri calendar is based on lunar cycles, with each year being about 354 days — roughly 11 days shorter than a Gregorian solar year. Over time, this difference accumulates: for every ~33 Gregorian years, you gain approximately 1 extra Hijri year.
What is the Hijri calendar based on?
The Hijri (Islamic) calendar is a purely lunar calendar based on the cycles of the moon. Each month begins with the sighting of the new crescent moon (hilal). It was established by Caliph Umar ibn Al-Khattab, with the starting point being the Prophet Muhammad's migration (Hijra) from Mecca to Medina in 622 CE.
How many days are in a Hijri year?
A Hijri year has either 354 or 355 days, compared to 365 or 366 days in a Gregorian year. Each Hijri month alternates between 29 and 30 days, following the lunar cycle of approximately 29.53 days.
What is my Islamic birthday called?
An Islamic birthday based on the Hijri calendar falls on a different Gregorian date each year because of the ~11-day annual shift. There is no specific Arabic term for 'Hijri birthday,' but many Muslims track it to observe religious milestones.
Does Zakat calculation use Hijri age?
Yes, Zakat becomes obligatory after wealth has been held for one full Hijri (lunar) year above the Nisab threshold. This is why tracking dates in the Hijri calendar is important for accurate Zakat calculation.
What is the significance of Fridays in Islam?
Friday (Yawm al-Jumu'ah) is the most important day of the week in Islam. Muslims gather for congregational prayer (Salat al-Jumu'ah). The Prophet Muhammad ﷺ said it is the best day on which the sun rises, the day Adam was created, and the day he entered Paradise.
How do I find my next Hijri birthday?
The calculator above shows your next Hijri birthday automatically. It takes your Hijri birth month and day, finds the next occurrence in the current or coming Hijri year, and converts it back to the Gregorian calendar.
What is the difference between Hijri and Solar Hijri (Persian) calendar?
The Hijri (Islamic) calendar is lunar — months follow moon cycles. The Solar Hijri (Shamsi) calendar, used in Iran and Afghanistan, is solar — months follow the sun and seasons. Both start from the Prophet's Hijra in 622 CE but differ in year lengths (354 vs 365 days).
Is the Hijri calendar used for official purposes anywhere?
Yes. Saudi Arabia uses the Hijri calendar as its official civil calendar. Many Muslim-majority countries use it alongside the Gregorian calendar for religious observances, determining Ramadan dates, Hajj timing, and Islamic holidays.
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Hijri Age Calculator — Find Your Age in the Islamic Calendar | Hijri.cool