Age Calculator (Hijri & Gregorian)
Calculate your age in years, months, and days across both the Gregorian and Hijri calendars at once, plus the total days you have lived, your day of birth, and the countdown to your next birthday. Accepts a birth date in either calendar.
How to Use
- Choose the calendar your birth date is in: Gregorian or Hijri
- Enter the birth day, month, and year (Hijri months are named when Hijri is selected)
- Leave the reference date as "today", or open "as of a specific date" to age up to a chosen date
- Read your age in both calendars, total days lived, weekday born, and the countdown to your next birthday in both dates
Age Calculator in Both the Hijri and Gregorian Calendars
This tool computes your age in years, months, and days across both the Gregorian and Hijri calendars at the same time. Government offices, universities, and HR departments in Saudi Arabia routinely ask for age in the Hijri calendar, while daily life runs on the Gregorian one — so the calculator shows both figures together and saves you a manual conversion.
Why is Hijri age higher than Gregorian age?
The lunar Hijri year is about 11 days shorter than the solar Gregorian year — roughly 3% shorter. Your Hijri age is therefore always higher than your Gregorian age, and the gap widens with time until it reaches a full year about every 33 years.
What else does it show?
Besides age in both calendars, it shows the total number of days you have lived, the weekday you were born on, and how many days remain until your next birthday in both the Gregorian and Hijri dates. You can also compute age as of a specific past or future date — handy for forms that ask for your age on a particular day.
Calculation Methodology
The dual-calendar method
The birth date is first converted to Gregorian if it was entered in Hijri (via the Umm al-Qura calendar). Gregorian age is then computed by subtracting the components with a borrow from the actual length of the preceding month, and Hijri age by converting to Umm al-Qura months and subtracting the same way.
Hijri drift (~11 days/year)
Because the lunar year is about 11 days shorter, Hijri age grows faster than Gregorian age. This is expected behaviour, not a rounding error.
Feb-29 birthdays
Someone born on 29 February (a leap year) has their birthday treated as 28 February in non-leap years for the countdown. The calculator shows that date in the next-birthday card.
Range limits
Hijri conversion uses the Umm al-Qura calendar over roughly 1300–1500 AH (1882–2077 CE). Dates outside this range return a clear error rather than an inaccurate result.
Practical Examples
Both-calendar age for a government form
Salem was born on 15 June 1990. As of 15 June 2020 he is exactly 30 Gregorian years old, and about 30 years and 11 months in the Hijri calendar. He uses the Hijri value when official paperwork asks for it.
Entering a Hijri birth date
Noura only knows her birth date in Hijri: 21 Dhu al-Qadah 1410. By choosing the Hijri calendar she gets her age in both calendars directly, with no need to convert first.
Birthday countdown
Fahd wants to know how many days until his next birthday. The calculator shows the days remaining and the date in both the Gregorian and Hijri calendars.
Frequently Asked Questions
How old am I in Hijri?
Why does Hijri age differ from Gregorian age?
How is a Feb-29 birthday handled?
Which age do Absher and universities use?
Can I compute my age as of a past or future date?
Disclaimer: The results shown are approximate and for reference only, and do not constitute financial or legal advice. Actual amounts may vary based on additional factors. Please consult the relevant official authorities or a licensed financial advisor for accurate information specific to your situation.