Hijri & Gregorian Age Calculator

Hijri and Gregorian Age Calculator

This calculator works out your exact age in both the Hijri (Islamic) and Gregorian calendars from a single birth date. Enter the day you were born and it returns your age in years, months and days, showing how the two calendars differ for the very same person. Everything runs in your browser, so no personal information is stored or sent anywhere.

The difference appears because the Hijri calendar is lunar, with twelve months that follow the moon and a year of roughly 354 days, while the Gregorian calendar is solar with about 365 days. Over time this gap of around eleven days each year adds up, so your Hijri age is always a little higher than your Gregorian age. The longer you live, the larger the difference becomes, which is why many people are surprised by the result.

Why use it

Knowing your age in both systems is helpful for official paperwork, religious milestones, family records, and simply understanding how the two calendars relate. To use the tool, pick your date of birth, choose whether you entered it as Hijri or Gregorian, and read the converted age instantly. Because the calculation is precise to the day, it is far more reliable than rough mental estimates or adding a fixed number of years.