In our modern world, calculating age has become more than just counting the number of years since birth. While the Gregorian age calculator is widely used around the world, many people also prefer knowing their age in Hijri, especially in Islamic countries. A Hijri age calculator allows users to know their age based on the Islamic calendar, which follows the lunar system. This article explains how to use these tools, the differences between calendars, and the religious and practical applications of the Hijri system.
Understanding the Basics: Gregorian vs. Hijri Calendar
The Gregorian calendar is solar-based and consists of 365 days in a normal year and 366 days in a leap year, aligning with Earth’s orbit around the Sun. It starts from the birth year of Jesus Christ, making it widely accepted in Western and global systems.
On the other hand, the Hijri calendar is a lunar-based system with 12 months that total about 354 or 355 days, based on the moon’s phases. The starting point of the Hijri calendar is the Hijra — the migration of Prophet Muhammad (peace be upon him) from Mecca to Medina in 622 CE.
Because of the 11-day difference each year, a person’s Hijri age will always appear older than their Gregorian age. Over time, this small yearly gap grows larger. For example, someone who is thirty-five years old in the Gregorian system could be around 36 or 37 Hijri years old.

What Is a Hijri Age Calculator?
A Hijri age calculator is a digital tool designed to calculate your age based on the Islamic lunar calendar. By entering your date of birth in either Gregorian or Hijri format, the calculator converts it using a built-in converter, providing your exact age in Hijri years, months, and days.
Some calculators offer added features such as:
- Day of the week you were born
- Birthday counter
- Exact time age calculator (showing minutes and seconds)
- Full Gregorian age alongside Hijri age
How to Use a Hijri Age Calculator
Using an online Islamic Hijri age calculator is very simple. Most tools only require three inputs:
- Your birth day, month, and year (can be Hijri or Gregorian)
- The current date (auto-filled or manually entered)
- One click on the “Calculate” button
The tool then displays your:
- Age in Hijri years, months, and days
- Your Gregorian age
- Day of the week you were born
- Some calculators also offer extras like your zodiac sign, related star constellations, and symbols from the Chinese zodiac calendar.
Many free online platforms offer these calculators, while some advanced scientific calculators or paid applications provide extended features, such as PDF reports and milestone tracking.
Why Hijri Age Is Important
In many Islamic countries, legal age, religious observances, and registration for certain activities are determined by the Hijri calendar. For instance:
- Eid celebrations, Hajj, Umrah, and Ramadan dates are Hijri-based.
- Certain religious rituals require a specific Hijri age.
- Important life events such as birthdays, anniversaries, and reaching the age of maturity (baligh) are traditionally recognized according to the Islamic calendar.
Thus, knowing your age based on Hijri calendar can be vital for:
- Religious purposes
- Legal documentation
- Personal interest
- Cultural heritage
Differences in Calculation: A Closer Look
To calculate Hijri age, understanding the difference between calendars is essential. Let’s break it down:
- The solar Gregorian year = approximately 365.25 days
- The Hijri lunar year = about 354 or 355 days
- Each year, the Hijri calendar lags behind by 10 to 11 days
- This means you “age” faster in Hijri years
Example:
If someone was born on 1st January 1990 (Gregorian):
- In 2024, they are 34 Gregorian years old
- But in Hijri, they might be 36 years old
The converter calculates this using date strings, aligns leap years, and adjusts the results based on leap days, which occur every four years in the Gregorian calendar and occasionally in the Hijri system as well.
The Hijri Months
For accurate calculation, the Islamic calendar months must be recognized:
- Muharram
- Safar
- Rabi al-Awwal
- Rabi al-Akhir
- Jumada al-Awwal
- Jumada al-Akhira
- Rajab
- Shaban
- Ramadan
- Shawwal
- Dhul-Qadah
- Dhu al-Hijjah
Each of these months has either 29 or 30 days, depending on moon sighting, adding another layer of complexity for manual calculations, which is why most people prefer a Hijri age calculator online.
Where Can You Find a Hijri Age Calculator?
Many websites and electronic networks provide free access to Hijri age calculators. They often include:
- Instant calculation
- Responsive layout
- Option to convert between Gregorian to Hijri date converters and vice versa
- Age calculator Hijri to Gregorian
These tools can be accessed via:
- Web browsers (no download needed)
- Mobile applications
- Dedicated calculator programs
- Some tools also include a Chinese Age Calculator and zodiac information for users interested in multiple calendars.
Scientific and Practical Applications
Beyond religious or personal use, these calculators are essential in:
- Health tracking (age-appropriate healthy weight)
- Educational milestones
- Government transactions
- Online registrations
- Tracking pregnancy due dates in Hijri
- Astrological readings for those who align their zodiac signs, like Aries, Leo, Cancer, Taurus, and other,s with the lunar calendar
Benefits of Using a Hijri Age Calculator
- Quick and Accurate: No manual math or date conversions.
- Saves Time: Results are shown within seconds.
- User-Friendly Interface: Easy for all age groups.
- Supports Multiple Formats: Input either Gregorian or Hijri date of birth.
- Detailed Results: Includes number of full days, weeks, months, and years.
- Accessible Anywhere: Compatible with both desktop computers and mobile phones for easy use on any device.
Final Thoughts
The Hijri age calculator is more than just a tool—it’s a connection to Islamic heritage, religious observances, and cultural identity. By offering both Hijri and Gregorian results, these calculators allow people to align their spiritual life with modern-day practicalities.
As the world continues to digitalize, the demand for precise, online age calculator programs that are easy to use and culturally aware is growing. Whether you’re marking a birthday, getting ready for Hajj, or simply interested in knowing your age according to the Hijri calendar, this tool provides a quick and precise answer.