CalcaTools

Islamic Calendar Calculator | Show Hijri & Gregorian dates

An Islamic Calendar Calculator shows a full Hijri (Islamic lunar) year or single month alongside the corresponding Gregorian dates. The calculator covers all 12 Hijri months — 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 — with each month's length and starting Gregorian date.

Last updated: June 2026 · Free · No sign-up required

Leave blank to use the current Hijri year.

Results

Enter values above and click Calculate to see your result instantly.

Quick reference

Hijri month (1447 AH)Begins
Muharram27 Jun 2025
Ramadan18 Feb 2026
Shawwal20 Mar 2026
Dhu al-Hijjah16 May 2026

calendar_month 12 lunar months

Each Hijri month is 29–30 days. The calendar tracks 12 months for a total of 354 days, 11 days shorter than the Gregorian year.

auto_awesome 4 sacred months

Muharram, Rajab, Dhul Qi'dah and Dhul Hijjah are the four sacred months (Surah At-Tawbah 9:36). Fighting in these months is traditionally forbidden.

mosque Religious anchor

Ramadan (9), Shawwal (10) and Dhul Hijjah (12) anchor the year's three biggest religious events — fasting, Eid al-Fitr, and Hajj + Eid al-Adha.

history Started 622 CE

Year 1 AH (Anno Hegirae) corresponds to 622 CE — the year of the Prophet (ﷺ)'s migration from Mecca to Madinah. 2026 CE = approximately 1447–1448 AH.

Interpretation guide

FactValue
Hijri year length354 or 355 days (1447 = 355)
Month length29 or 30 days
Sacred monthsMuharram, Rajab, Dhu al-Qa’dah, Dhu al-Hijjah

lightbulb Worked example

Let's say you are using the Islamic Calendar Calculator. An Islamic Calendar Calculator shows a full Hijri (Islamic lunar) year or single month alongside the corresponding Gregorian dates. The calculator covers all 12 Hijri months — Muharram, Safar, Rabi' Enter the values that match your situation into the input fields and press calculate — using realistic numbers makes the result directly useful for you.

Result: The calculator instantly applies the formula Gregorian start = tabular Hijri→Gregorian conversion per month (30-yr cycle, 11 leap years) and returns the result with appropriate precision.

What this means: Read the result in the context of what you are measuring. The step-by-step breakdown lets you confirm the math and understand which input most affects the outcome.

Formula & methodology

Formula: Gregorian start = tabular Hijri→Gregorian conversion per month (30-yr cycle, 11 leap years)

The Islamic Calendar Calculator is built on a well-established calculation method. It uses the formula Gregorian start = tabular Hijri→Gregorian conversion per month (30-yr cycle, 11 leap years) to turn your inputs into a reliable result. An Islamic Calendar Calculator shows a full Hijri (Islamic lunar) year or single month alongside the corresponding Gregorian dates. The calculator covers all 12 Hijri months — Muharram, Safar, Rabi' al-Awwal, Rabi' The steps are shown on the page so you can follow the reasoning from input to output.

  1. Enter a Hijri year (or leave blank for the current one) and choose year or single-month view.
  2. The arithmetic (tabular) Islamic calendar converts each month’s 1st to a Gregorian date.
  3. Month lengths (29/30) and the year total are computed from the conversions.

Worked example: 1447 AH spans 27 Jun 2025 – 16 Jun 2026 (355 days), with Ramadan beginning 18 February 2026 and Shawwal (Eid) on 20 March 2026 — matching the season’s published dates.

Authoritative source: al-Islam.org — Islamic Calendar Reference

Frequently asked questions

What Hijri year is it now?
The Islamic Calendar Calculator is free, private, and accurate: it runs entirely in your browser (no uploads, no accounts), applies the standard calculation, and explains each step so you can verify the result. An Islamic Calendar Calculator shows a full Hijri (Islamic lunar) year or single month alongside the corresponding Gregorian dates. The calculator covers all 12 Hijri months — Muharram, Safar, Rabi' al-Awwal, Rabi' al-Thani, Jumada al-Awwal, Jumada al-Thani, There is no limit on usage, and it works on any device.
Why are Islamic months 29 or 30 days?
A lunar month is the time between two new moons, about 29.53 days, so months must alternate between 29 and 30 days to stay aligned with the moon. The tabular calendar fixes this alternation with a 30-year cycle of 11 leap years. Actual moon-sighting calendars follow observation, so any month can be 29 or 30 days depending on the crescent.
Tabular calendar vs moon sighting — what’s the difference?
The tabular (arithmetic) calendar fixes month lengths by a 30-year cycle with 11 leap years, so dates are known years in advance and consistent worldwide. Moon sighting instead starts each month when the crescent is actually observed, which depends on location, weather, and local announcement — so it can differ by a day. This calculator shows the tabular dates; verify against your local authority for worship.
What are the sacred months?
The four sacred months in Islam are Muharram, Rajab, Dhul-Qi'dah, and Dhul-Hijjah. During these months, warfare and aggression are traditionally forbidden, and their observance predates Islam, continuing after it. The calendar calculator highlights these months in the Hijri year view so you can see them in context with their Gregorian dates.
Why do Ramadan dates differ between sources?
Different sources use different methods: tabular calendars (like this one) compute dates arithmetically, while authorities in moon-sighting regions announce dates based on the actual crescent observation, which can shift the start by a day depending on location, weather, and sighting criteria. Saudi Arabia uses the Umm al-Qura calculated calendar. All are legitimate; they simply use different criteria.
What does the Islamic Calendar Calculator do?
An Islamic Calendar Calculator shows a full Hijri (Islamic lunar) year or single month alongside the corresponding Gregorian dates. The calculator covers all 12 Hijri months — Muharram, Safar, Rabi' al-Awwal, Rabi' al-Thani, Jumada al-Awwal, Jumada al-Thani,. The calculator takes your inputs, applies the standard calculation, and returns a clear result so you can make an informed decision without doing the math by hand.
What formula does the Islamic Calendar Calculator use?
The Islamic Calendar Calculator applies the standard formula: Gregorian start = tabular Hijri→Gregorian conversion per month (30-yr cycle, 11 leap years). The tool walks through each step of the calculation so you can verify the numbers yourself.
Is the Islamic Calendar Calculator free and private?
Yes — the Islamic Calendar Calculator. There is no sign-up, no paywall, no trial, and no limit on how many calculations you can run. CalcaTools covers its costs with non-intrusive display advertising, so the calculator itself never asks for payment or restricts any feature.
How accurate is the Islamic Calendar Calculator?
The Islamic Calendar Calculator applies the standard formula: Gregorian start = tabular Hijri→Gregorian conversion per month (30-yr cycle, 11 leap years). It is tested against published worked examples before launch and uses native double-precision arithmetic, so results are accurate to typical precision for the values you enter — with no intermediate rounding that could distort the answer.

Explore the full Islamic toolkit

Every CalcaTools Islamic calculator — zakat and charity, prayer times, the Hijri calendar, halal finance, and family tools — cross-checked against the Umm al-Qura calendar and classical fiqh references.

Zakat & charity

Prayer & worship

Hijri calendar & dates

Halal finance & pilgrimage

Family & lifestyle

More Islamic tools