A-Levels to CAO Points Calculator & Conversion Matrix (2026)

Key Takeaways:

• The 4-Subject Maximum: Unlike the Irish Leaving Certificate which counts your best six subjects, the CAO only counts a maximum of four different recognized subjects for A-Level applicants.
• The Heavy Weighting of the First 3: The CAO places massive value on your top three A-Level grades. An A* in your first three subjects is worth a massive 192 points, but an A* in your 4th subject is only worth 24 points.
• The Mathematics Bonus: Just like Irish students, A-Level applicants receive a 25-point bonus if they achieve a Grade E or higher in A-Level Mathematics (Pure Maths and Further Maths cannot be counted twice for the bonus).
• Single Sitting Rule: Your best A-Level grades must be achieved within a single academic year to be scored together for points, though you can carry forward AS-Levels from the previous year.
• Basic Matriculation: Before your points are calculated, you must prove you meet basic university entry requirements, which usually means presenting at least two A-Levels at Grade C or higher, plus four other passing grades at GCSE level (including English and often Maths).

For students in Northern Ireland, England, Scotland, and Wales, the Republic of Ireland has become a massive higher-education destination. With lower tuition fees than the UK (due to the Free Fees Initiative for EU/UK citizens under the Common Travel Area) and world-renowned research universities, thousands of UK applicants use the Central Applications Office (CAO) system every year.

However, the UK education system and the Irish education system operate on completely different numerical scales. A-Level students typically sit 3 or 4 highly specialized subjects, while Leaving Certificate students sit 7 broad subjects.

To make the competition fair, the CAO uses a highly specific algorithmic matrix to convert A-Level and AS-Level letter grades into the Irish points system. This 2026 guide breaks down the exact conversion table, explains the rules for combining AS-Levels, and helps you manually calculate your total CAO points.

1. The 2026 A-Level to CAO Points Conversion Matrix

When converting your A-Levels, the CAO uses a tiered scoring system. Your best three A-Levels are scored on a high-yield “Primary Scale.” If you take a 4th A-Level (or an AS-Level/EPQ), it is scored on a significantly lower “Secondary Scale.”

This is designed to ensure A-Level students do not gain an unfair advantage over Leaving Cert students simply by taking a 4th subject.

Official 2026 CAO A-Level Points Grid

A-Level Grade	Points (For Best 3 A-Levels)	Points (For 4th A-Level / AS-Level / EPQ)
A*	192	24
A	165	24
B	142	20
C	120	18
D	100	16
E	67	14

(Note: If you present 4 full A-Levels, your lowest grade is automatically relegated to the 4th A-Level points column).

2. See It In Action: Interactive A-Level Points Calculator

Use this interactive tool to simulate your exact CAO points based on your predicted A-Level grades.

Key insight: The mathematics bonus (+25 points) is massive. An A-Level student with grades of B, B, C in standard subjects scores 404 points. If one of those B’s is in Mathematics, their score jumps to 429 points.

3. Rules for Combining A-Levels and AS-Levels

The CAO is very strict about how and when you sat your exams. You cannot accumulate A-Levels over three years and pick your best scores.

The Single Sitting Rule:

To count towards your final CAO points tally, your primary A-Level grades must be achieved in a single sitting (meaning a single academic year, e.g., September 2025 to August 2026).

However, because many UK students sit AS-Levels in Year 13 and full A-Levels in Year 14, the CAO permits specific combinations for scoring purposes:

• Combination 1: Your best 4 A-Level results from a single sitting.
• Combination 2: Your best 3 A-Level results from a single sitting, PLUS your best AS-Level (or EPQ) result from the previous or same sitting.
• Combination 3: Your best 2 A-Level results from a single sitting, PLUS your best 2 AS-Level results from the previous or same sitting.

Crucial Warning: You cannot combine an A-Level and an AS-Level in the exact same subject. For example, if you scored a B in AS-Level History and an A in A-Level History, you can only use the A-Level score.

4. Understanding Basic Matriculation for UK Students

A massive pitfall for UK applicants is focusing entirely on the points matrix and ignoring basic university matriculation.

In the UK (via UCAS), universities often only ask for “Three A-Levels at A, A, B.”

Irish universities are different. They require a broad foundation of education. Even if you have three A*s in your A-Levels, if you failed GCSE English, the Irish university will instantly reject your CAO application.

Standard Matriculation for A-Level Applicants:

To matriculate into a standard Level 8 Honours Degree at a major Irish university (like UCD, Trinity, or University of Galway), you must generally present:

1. A minimum of Grade C or better in two A-Level subjects.
2. Passes (Grade C / Grade 4 or better) in four other recognized subjects across A-Level or GCSE.
3. These six subjects must include English, Mathematics, and often a foreign language depending on the university (see the NUI Third Language rule).

You must supply certified evidence of your GCSE results to the CAO via mail or online upload to prove you meet these underlying requirements.

5. Converting GCSEs to Meet Course Specific Requirements

Beyond general university matriculation, specific courses have their own hurdles. For example, to study Engineering at UCD, you need an equivalent to a Higher Level H4 in Irish Leaving Cert Maths.

How does the university check this against your UK grades?

• An A-Level Grade C is generally considered the equivalent of an Irish Higher Level H4.
• An A-Level Grade D is generally considered the equivalent of an Irish Higher Level H6.
• A GCSE Grade 6/B is generally considered the equivalent of an Irish Ordinary Level O4.

If a course requires an O4 in Biology, your GCSE Grade B in Biology is perfectly sufficient to satisfy the requirement, even if you did not carry Biology forward to A-Level.

Align Your CAO and UCAS Strategy

Applying to the CAO from the UK gives you incredible optionality. You can hold a UCAS offer for a university in London and simultaneously hold a CAO offer for a university in Dublin, waiting until late August to make your final decision.

However, you must ensure your administrative profile is flawless. If you are an EU, EFTA, or UK applicant, make sure you understand the documentation deadlines by reviewing our broader guide on Non-Standard CAO Applications Guide: Mature, QQI & International. Additionally, if your calculated A-Level points put you slightly below the threshold for courses at UCD or Trinity, strategically explore the regions by reading our Level 8 vs Level 7 CAO Courses & University Points Comparison to find premium degrees with lower points thresholds.

Disclaimer: The conversion matrix and A-Level scoring rules provided in this guide reflect the official 2026 Central Applications Office (CAO) guidelines. A-Level to CAO points conversions, matriculation equivalencies, and EPQ acceptances are strictly governed by the CAO and individual Higher Education Institutions. CAO Point is an independent platform. Always verify final grade equivalencies directly through the official cao.ie portal and the specific university’s international admissions office.