How to Convert Hijri and Gregorian Dates in Under a Minute
Reviewed by the FreeOnline.fyi team · Updated 2026-09-09
Every year, the Islamic calendar drifts about 10 to 11 days earlier against the
Every year, the Islamic calendar drifts about 10 to 11 days earlier against the Gregorian calendar. That drift is small enough to ignore day to day, but it matters a lot when you are pinning down the start of Ramadan, scheduling a Hajj permit, or filling in an Algerian birth certificate that lists both calendars. We built the Hijri-Gregorian Date Converter for exactly these moments: a single screen, no sign-up, and an answer in well under a second.
The tool runs entirely in your browser. No data leaves your device, no account is created, and the first conversion usually appears in under 100 milliseconds. That is deliberate. For personal dates, you want a fast, trustworthy result before continuing with whatever else is on your screen, and a network round-trip would only slow that down.
To convert in the default direction, leave the toggle at Hijri -> Gregorian and
To convert in the default direction, leave the toggle at Hijri -> Gregorian and fill in the three compact fields below it. The day field accepts 1 to 30, with the validator silently capping any out-of-range entry. The month dropdown lists the twelve Islamic months in order: Muharram, Safar, Rabi al-awwal, Rabi al-thani, Jumada al-awwal, Jumada al-thani, Rajab, Sha'ban, Ramadan, Shawwal, Dhul-Qi'dah, and Dhul-Hijjah, so you pick the name rather than memorize numbers. The year field covers 1300 to 1500 AH, a 600-year window that handles nearly every historical, contemporary, and near-future date you will encounter.
A quick sanity check: tap the Today button at the top of the form, which auto-fills all three fields from the current Gregorian date and flips the toggle to Gregorian -> Hijri for you. If the result matches your mosque's announcement for today, you have a working reference point for the rest of the month and can move on to specific events with confidence.
For the reverse direction, tap the toggle once to switch to Gregorian -> Hijri.
For the reverse direction, tap the toggle once to switch to Gregorian -> Hijri. The day field now accepts up to 31, and the month dropdown swaps to January through December with the current year defaulting to 2025. Hit convert and the result card updates in the same instant: no submit button, no page reload, no spinner.
The result card shows both calendars side by side, labeled Input and Result, each formatted as DD Month YYYY, for example '15 Ramadan 1446 AH' on one side and '15 March 2025 CE' on the other. The weekday (Saturday, السبت, lundi, depending on locale) appears under the primary date so you can quickly tell whether a planned event lands on a working day, a Friday prayer, or a weekend.
We tested two patterns that come up often in real planning.
We tested two patterns that come up often in real planning. First, when scheduling a trip around Ramadan, enter 1 Ramadan 1447 in Hijri -> Gregorian mode and copy the resulting civil start date into your calendar. If you also need to convert currency, units, or files for the same trip, the Universal Online Converter Hub sits in the same toolset so you can stay on FreeOnline.fyi rather than juggling tabs.
Second, when filling out a passport or civil document that asks for a Gregorian date of birth, run the date once through Gregorian -> Hijri and copy the formatted result back. Both halves of the form stay consistent, and you avoid the common mistake of mixing up the two year fields.
The tool uses the standard arithmetic Islamic calendar (the Tabular Islamic Cale
The tool uses the standard arithmetic Islamic calendar (the Tabular Islamic Calendar, sometimes called the Kuwaiti algorithm), which is the same baseline used by most online calculators and by Microsoft Outlook. It does not account for moon-sighting (rukyah) adjustments, which Saudi Arabia's Umm al-Qura calendar uses and which can shift the start of Ramadan by a day or two each year. For religious observance, defer to your local mosque or to Saudi Arabia's official announcements; for civil paperwork, academic citations, and general planning, the converter is reliably accurate. To go deeper on the underlying algorithms, Encyclopaedia Britannica's Islamic calendar entry is a good starting point, and Time and Date's Islamic calendar page has a useful comparison of Tabular vs. Umm al-Qura.
If you need more than date conversion during the same session, the rest of the FreeOnline.fyi free online tools catalog covers currencies, units, and other everyday calculations in the same no-account style, so a single tab can handle the full stack of conversions a trip, document, or research project tends to throw at you.