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Hijri Age Calculator

Enter your birth date in Hijri or Gregorian to see your age in lunar months and years, and when your next Hijri birthday falls.

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Exact age in years, months and days, Hijri and Gregorian, your next birthday and life milestones.

What is Hijri age?

Hijri age is your age measured in lunar years and months. Each Hijri year of your life completes when the same day of the same Hijri month comes round again. Someone born on 1 Ramadan completes each Hijri year on 1 Ramadan, whatever the Gregorian date.

Why Hijri age is higher

A lunar month has 29 or 30 days, so a Hijri year has 354 or 355 days against 365 or 366 in the Gregorian calendar. The difference of about 11 days a year accumulates:

Gregorian age Approximate Hijri age
10 years 10 years and 4 months
18 years 18 and a half years
33 years 34 years
50 years 51 and a half years

The Umm al-Qura calendar

We use Umm al-Qura, the Hijri calendar used for civil purposes in Saudi Arabia. Its tables come from the ICU library in modern browsers (we do not re-implement them), and our tests round-trip every day from 1300 to 1600 AH. The official start of Ramadan, Shawwal and Dhu al-Hijjah follows moon sighting and can differ from the calendar by a day.

Example

Born 1 Ramadan 1410 AH (28 March 1990). On 1 Muharram 1447 AH (26 June 2025):

  • Hijri age: exactly 36 years and 4 months.
  • Gregorian age: 35 years, 2 months and 29 days.
  • Days between the dates: 12,874, identical in both calendars. Only the grouping into months and years differs.

Short Hijri months

If you were born on the 30th of a Hijri month and that month has only 29 days in a later year, your Hijri birthday is counted on its last day, the same rule used for 29 February. See the Methodology. To convert any other date, use the Hijri–Gregorian Converter.

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Frequently asked questions

How do I calculate my Hijri age?

Enter your Hijri birth date as it appears on your documents, or enter it in Gregorian and let the calculator convert it. You get your age in Hijri years, months and days, with your Gregorian age for comparison.

Why is my Hijri age higher than my Gregorian age?

A Hijri year is about 11 days shorter, so Hijri years complete sooner. About 33 Gregorian years equal 34 Hijri years.

Which Hijri calendar is used?

Umm al-Qura, the calendar used for civil purposes in Saudi Arabia, as shipped in the ICU library built into modern browsers.

Why could my Hijri birth date differ by a day?

Older or locally recorded dates may have followed moon sighting rather than Umm al-Qura. If your Hijri date is on an official document, enter it directly in Hijri.