Islamic Age Calculator
The Hijri calendar has 12 lunar months and about 354 days a year, so Hijri age grows a little faster than Gregorian age — roughly one extra year every 33 years. This page converts dates with the Umm al-Qura calendar (Saudi Arabia's official calculated calendar). Where months begin by local moon sighting, dates can differ by a day or two.
Before you start
Method : Umm al-Qura Hijri conversion (browser ICU calendar) and completed years.
Checked : 1 Ramadan 1446 (1 Mar 2025), 1 Shawwal 1446 (30 Mar 2025), 1 Muharram 1447 (26 Jun 2025), 1 Ramadan 1447 (18 Feb 2026) and 1 Muharram 1356 (14 Mar 1937) tested. Supported range 1900–2076; the official Umm al-Qura tables cover 1356–1500 AH (1937–2077), so earlier dates use ICU's reconstructed table. Umm al-Qura is Saudi Arabia's civil calendar; many countries start months by local moon sighting, which can differ by a day or two.
Review : not independently reviewed by an expert or by the organisation whose rules are used.
Your entries stay in this browser tab; nothing is sent or stored.
How to Use This Calculator
- Enter the Gregorian birth date (1900 or later).
- Change the "calculate on" date if needed.
- Press Calculate.
Methodology & assumptions
Each date is converted to Umm al-Qura with the browser's ICU calendar. Completed Hijri years = Hijri year now − Hijri birth year, minus 1 if the Hijri birthday hasn't come yet this year. The next Hijri birthday is found by checking each following day.
Worked examples
Born January 1, 2000 = 24 Ramadan 1420 AH. On October 5, 2026 (24 Rabi' al-thani 1448) the Hijri age is 27 (Gregorian age 26); next Hijri birthday is 24 Ramadan 1448.
February 18, 2026 = 1 Ramadan 1447 in Umm al-Qura.
Understanding your result
For religious dates, follow your local authority. Gregorian age is still used for legal purposes in most countries.
Sources & further reading
- Unicode ICU. Calendar support (islamic-umalqura).Implementation used by the browser.
- Wikipedia. Islamic calendar — Saudi Arabia's Umm al-Qura calendar.Secondary overview of the calendar and moon-sighting differences.
Frequently Asked Questions
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