Table 1

Approximation of how various climbing grading systems compare

British	Australia	YDS	UIAA	French
YDS, Yosemite decimal system; UIAA, International Union of Alpinist Associations (Union Internationale d’Associations d’Alpinisme).
	19	5.10a	VI+	6a
5c	19/20	5.10b	VII-	6a+
	20	5.10c	VII	6b
5c+	21	5.10d	VII+	6b+
	21/22	5.11a	VII+/VIII-	6c
6a+	22	5.11b/c	VIII-	6c+
	23	5.11d	VIII	7a
6b	24	5.12a	VIII/VIII+	7a+
	25	5.12b	VIII+	7b
6b+	26	5.12c	IX-	7b+
	27	5.12d	IX	7c
	28	5.13a	IX/IX+	7c+
6c+	29	5.13b	IX+	8a
	30	5.13c	X-	8a+
7a	31	5.13d	X	8b
	32	5.14a	X+	8b+
7a+	33	5.14b	XI-	8c
	34	5.14c	XI	8c+
7b	35	5.14d	XI+	9a
	36	5.15a	XII-	9a+
	37	5.15b	XII	9b