Cumulative GPA (CGPA) Calculator
Want to know your new cumulative GPA the moment this term’s grades land? Enter your current CGPA, credits earned so far, this term’s GPA and this term’s credits to see the credit-weighted new CGPA, total credits and the change. The math is the same whether your school uses the HK 4.3 scale (HKU, CityU, HKUST, PolyU) or the 4.0 scale (CUHK) — only the cap differs.
Please enter a valid number
New cumulative GPA
3.26
4.3-scale max is 4.30; CUHK 4.0-scale collapses A+ to 4.00.
Total credits after term
75
—
Change
+0.06
—
Prior quality points: —
Term quality points: —
Weighted average by credits. For P / NP / W courses that do not count toward GPA, set their credits to 0.
Formula
new CGPA = (current CGPA × prior credits + term GPA × term credits) ÷ (prior credits + term credits)
- · The tool uses the credit-weighted "quality-points" formula — quality points = GPA × credits — which is what HKU, CityU, HKUST, PolyU and CUHK SIS systems all use to compute CGPA.
- · 4.3 scale: A+ = 4.3, A = 4.0, A− = 3.7, B+ = 3.3, B = 3.0 … F = 0; maximum CGPA = 4.30. Used by HKU, CityU, HKUST, PolyU, LU and most HKBU programmes.
- · 4.0 scale: A+ collapses to A (both = 4.0); used by CUHK since 2012. Max CGPA on that scale is 4.00 — do not enter values above 4.0.
- · For P / NP / W courses that do not count toward GPA, set this term’s credits to 0. Your "credits earned so far" should likewise exclude P-graded credit.
- · Grade-replacement policy on retakes varies by institution and is not automated here. If your school replaces the old grade, manually subtract the old course’s quality points and credits before adding the new ones.
- · For self-reference only — the official CGPA comes from your school’s student information system (HKU Portal, CityU AIMS, HKUST SIS, PolyU eStudent, CUHK CUSIS).
Frequently asked
What is the difference between CGPA and semester GPA?
Semester GPA averages only the courses taken in a single term, weighted by credits. Cumulative GPA (CGPA) averages every GPA-bearing course you have taken since enrolment, weighted by credits. At the end of every term your CGPA is re-weighted with the new term’s grades and credits — which is exactly what this tool computes.
What term GPA do I need to reach a target cumulative GPA?
Invert the formula: required term GPA = (target CGPA × total credits − current CGPA × prior credits) ÷ term credits. Example: 90 credits at CGPA 3.20 and 18 credits this term, target 3.30 → (3.30 × 108 − 3.20 × 90) ÷ 18 = (356.4 − 288) ÷ 18 = 3.80. Or just type candidate GPAs into the "this term GPA" field and watch the new CGPA — same answer, less algebra.
Does the math differ between the 4.0 and 4.3 scales?
The weighted-average formula is identical; only the grade-point mapping and the cap differ. On the 4.3 scale, A+ = 4.3 and the maximum CGPA is 4.30; on the 4.0 scale (CUHK), A+ collapses to A = 4.0 and the cap is 4.00. Use the tool the same way for either scale — just stay within your school’s range (CUHK students should not enter values above 4.00).
I retook a course — does my old grade still count?
Depends on your school. HKU and HKUST generally count both attempts in CGPA (an old F stays); CityU and PolyU may allow the new grade to replace the old in some programmes; CUHK usually keeps both. If you want to exclude an old grade in this tool, recompute your "credits earned so far" and "current CGPA" with the old course removed before plugging them in.
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