Islamic Age Calculator
Your age in Hijri years — used for religious obligations that follow the lunar calendar
Frequently Asked Questions
Islamic (Hijri) age differs from Gregorian age because it's calculated against the lunar calendar, which runs shorter than the solar year — over a full lifetime, this gap adds up to a genuinely different age figure, which matters for religious milestones (like the age of religious accountability, baligh) that are conventionally reckoned in Hijri years.
Why Hijri age runs ahead of Gregorian age
A Hijri year averages 354.37 days against the Gregorian year's roughly 365.25 days — about 3% shorter. Because Hijri years pass slightly faster than Gregorian years, a person's Hijri age advances faster than their Gregorian age over time: roughly one additional Hijri year for every 33 Gregorian years lived. This means an older person's Hijri age and Gregorian age diverge by a more noticeable margin than a younger person's — the gap is small in childhood and compounds steadily across a lifetime, rather than staying constant.
A worked example
Two people born the same number of Gregorian years apart will also be the same number of Hijri years apart from each other, but each individual's own Hijri age will read higher than their Gregorian age by an amount that grows the older they get — a 66-Gregorian-year-old is roughly two Hijri years older in Hijri terms than the same 66-year Gregorian gap alone would suggest.
How this connects to your other Islamic calculations
This calculator uses the same underlying Gregorian-to-Hijri conversion logic as the standalone Hijri Date Converter — if you need to convert other specific dates (not just a birth date to today), that converter handles the general case in both directions.
Common mistakes
People sometimes assume Hijri age is simply "add a small fixed number of years" to Gregorian age, treating the gap as a flat offset rather than a proportional drift that compounds with age — the correct gap depends on exactly how many years have actually elapsed, not a one-size-fits-all adjustment, which is why an actual date-based calculation gives a meaningfully more accurate figure than a rough mental approximation.