IGCSE Combined Science (0653) grade boundaries — June 2026

Cambridge IGCSE (CAIE) (0653). 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 Combined Science required 146/200 (73%) on extended · papers 21, 41, 51.
That A* threshold is 1 mark lower than March 2026 — slightly easier to achieve.
Across paper variants, the A* boundary ranged from 145 to 146 marks — variant choice mattered this session.
A grade C needed roughly 40% on extended · papers 21, 41, 51.

Core · Papers 11, 31, 51

Grade	Min mark	Min %
C	91	46%
D	78	39%
E	66	33%
F	53	27%
G	40	20%

Maximum mark: 200.

Core · Papers 11, 31, 61

Grade	Min mark	Min %
C	91	46%
D	78	39%
E	66	33%
F	53	27%
G	40	20%

Maximum mark: 200.

Core · Papers 12, 32, 52

Grade	Min mark	Min %
C	93	47%
D	80	40%
E	68	34%
F	54	27%
G	40	20%

Maximum mark: 200.

Core · Papers 12, 32, 62

Grade	Min mark	Min %
C	93	47%
D	80	40%
E	68	34%
F	54	27%
G	40	20%

Maximum mark: 200.

Core · Papers 13, 33, 53

Grade	Min mark	Min %
C	93	47%
D	80	40%
E	68	34%
F	54	27%
G	40	20%

Maximum mark: 200.

Core · Papers 13, 33, 63

Grade	Min mark	Min %
C	91	46%
D	78	39%
E	66	33%
F	53	27%
G	40	20%

Maximum mark: 200.

Extended · Papers 21, 41, 51

Grade	Min mark	Min %
A*	146	73%
A	124	62%
B	102	51%
C	80	40%
D	69	35%
E	59	30%
F	49	25%
G	39	20%

Maximum mark: 200.

Extended · Papers 21, 41, 61

Grade	Min mark	Min %
A*	146	73%
A	124	62%
B	102	51%
C	80	40%
D	69	35%
E	59	30%
F	49	25%
G	39	20%

Maximum mark: 200.

Extended · Papers 22, 42, 52

Grade	Min mark	Min %
A*	145	73%
A	122	61%
B	99	50%
C	76	38%
D	65	33%
E	55	28%
F	45	23%
G	35	18%

Maximum mark: 200.

Extended · Papers 22, 42, 62

Grade	Min mark	Min %
A*	145	73%
A	122	61%
B	99	50%
C	76	38%
D	65	33%
E	55	28%
F	45	23%
G	35	18%

Maximum mark: 200.

Extended · Papers 23, 43, 53

Grade	Min mark	Min %
A*	146	73%
A	123	62%
B	100	50%
C	78	39%
D	68	34%
E	58	29%
F	47	24%
G	36	18%

Maximum mark: 200.

Extended · Papers 23, 43, 63

Grade	Min mark	Min %
A*	145	73%
A	122	61%
B	99	50%
C	76	38%
D	66	33%
E	56	29%
F	46	23%
G	36	18%

Maximum mark: 200.

Extended · Papers 50

Grade	Min mark	Min %
A*	80	89%
A	71	79%
B	62	69%
C	53	59%
D	45	50%
E	38	43%
F	31	35%
G	24	27%

Maximum mark: 90.

Calculate your Combined Science grade →

Official source (PDF) →

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