IGCSE Chemistry (0620) grade boundaries — June 2026

Cambridge IGCSE (CAIE) (0620). The official grade thresholds for the June 2026 series — the minimum raw mark needed for each grade, by tier and paper combination. Pick the option matching the papers you sat.

Cambridge publishes these as grade threshold tables: "grade thresholds" and "grade boundaries" are two names for the same numbers.

June 2026 at a glance

A A* in Chemistry required 173/200 (87%) on extended · papers 21, 41, 51.
That A* threshold is 2 marks higher than March 2026 — slightly harder to achieve.
Across paper variants, the A* boundary ranged from 168 to 175 marks — variant choice mattered this session.
A grade C needed roughly 46% on extended · papers 21, 41, 51.

Core · Papers 11, 31, 51

Grade	Min mark	Min %
C	105	53%
D	88	44%
E	72	36%
F	55	28%
G	38	19%

Maximum mark: 200.

Core · Papers 11, 31, 61

Grade	Min mark	Min %
C	107	54%
D	90	45%
E	73	37%
F	56	29%
G	39	20%

Maximum mark: 200.

Core · Papers 12, 32, 52

Grade	Min mark	Min %
C	107	54%
D	89	45%
E	71	36%
F	53	27%
G	35	18%

Maximum mark: 200.

Core · Papers 12, 32, 62

Grade	Min mark	Min %
C	108	54%
D	89	45%
E	71	36%
F	53	27%
G	35	18%

Maximum mark: 200.

Core · Papers 13, 33, 53

Grade	Min mark	Min %
C	106	53%
D	89	45%
E	72	36%
F	56	29%
G	40	20%

Maximum mark: 200.

Core · Papers 13, 33, 63

Grade	Min mark	Min %
C	107	54%
D	90	45%
E	73	37%
F	57	29%
G	41	21%

Maximum mark: 200.

Core · Papers 17, 31, 51

Grade	Min mark	Min %
C	105	53%
D	88	44%
E	72	36%
F	55	28%
G	38	19%

Maximum mark: 200.

Core · Papers 17, 31, 61

Grade	Min mark	Min %
C	107	54%
D	90	45%
E	73	37%
F	56	29%
G	39	20%

Maximum mark: 200.

Extended · Papers 21, 41, 51

Grade	Min mark	Min %
A*	173	87%
A	147	74%
B	119	60%
C	91	46%
D	78	39%
E	66	33%
F	53	27%
G	40	20%

Maximum mark: 200.

Extended · Papers 21, 41, 61

Grade	Min mark	Min %
A*	175	88%
A	150	75%
B	121	61%
C	93	47%
D	80	40%
E	67	34%
F	54	27%
G	41	21%

Maximum mark: 200.

Extended · Papers 22, 42, 52

Grade	Min mark	Min %
A*	168	84%
A	138	69%
B	108	54%
C	79	40%
D	68	34%
E	57	29%
F	46	23%
G	35	18%

Maximum mark: 200.

Extended · Papers 22, 42, 62

Grade	Min mark	Min %
A*	169	85%
A	139	70%
B	109	55%
C	80	40%
D	68	34%
E	57	29%
F	46	23%
G	35	18%

Maximum mark: 200.

Extended · Papers 23, 43, 53

Grade	Min mark	Min %
A*	172	86%
A	144	72%
B	116	58%
C	89	45%
D	76	38%
E	64	32%
F	53	27%
G	42	21%

Maximum mark: 200.

Extended · Papers 23, 43, 63

Grade	Min mark	Min %
A*	172	86%
A	145	73%
B	117	59%
C	90	45%
D	77	39%
E	65	33%
F	54	27%
G	43	22%

Maximum mark: 200.

Extended · Papers 27, 41, 51

Grade	Min mark	Min %
A*	173	87%
A	147	74%
B	119	60%
C	91	46%
D	78	39%
E	66	33%
F	53	27%
G	40	20%

Maximum mark: 200.

Extended · Papers 27, 41, 61

Grade	Min mark	Min %
A*	175	88%
A	150	75%
B	121	61%
C	93	47%
D	80	40%
E	67	34%
F	54	27%
G	41	21%

Maximum mark: 200.

Extended · Papers 50

Grade	Min mark	Min %
A*	81	90%
A	75	84%
B	66	74%
C	57	64%
D	50	56%
E	43	48%
F	35	39%
G	27	30%

Maximum mark: 90.

Calculate your Chemistry grade →

Official source (PDF) →

Figures sourced from the official Cambridge grade threshold tables. Always confirm with your exam board.