how many championship titles has the celtics won

The Boston Celtics have won 18 championships all-time.

	TEAM	CHAMPS	SEASON	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	MIN	PTS	REB	AST	STL	BLK	PF
1	Celtics	0	1946-47	60	241.3	60.1		7.8			23.3	85.6	27.2				13.5	22.9	59.0	31.4			14,475	3,605		470			1,202
2	Celtics	0	1947-48	48	242.6	68.8		7.6			25.9	90.1	28.7				17.1	26.0	65.9	33.9			11,645	3,303		364			1,065
3	Celtics	0	1948-49	60	241.3	76.6		18.9			28.4	91.4	31.1				19.7	30.9	63.6	36.5			14,475	4,593		1,135			1,382
4	Celtics	0	1949-50	68	241.5	79.7		21.7			28.6	84.6	33.8				22.5	31.8	70.7	40.4			16,420	5,420		1,473			1,644
5	Celtics	0	1950-51	69	244.7	85.2	50.7	22.9			29.9	81.3	36.8				25.4	35.0	72.5	44.1			16,885	5,881	3,499	1,579			1,881
6	Celtics	0	1951-52	66	241.9	91.3	56.8	24.3			32.3	83.5	38.7				26.7	36.5	73.4	45.9			15,965	6,027	3,750	1,606			1,734
7	Celtics	0	1952-53	71	242.5	88.1	54.4	23.5			30.7	78.2	39.2				26.8	36.9	72.8	46.7			17,215	6,258	3,865	1,666			1,911
8	Celtics	0	1953-54	72	244.9	87.7	53.7	24.6			31.0	77.5	40.0				25.7	35.4	72.6	47.1			17,630	6,315	3,867	1,773			1,969
9	Celtics	0	1954-55	72	241.0	101.5	59.6	26.5			36.2	90.7	39.9				29.1	37.6	77.6	47.3			17,355	7,305	4,293	1,905			1,859
10	Celtics	0	1955-56	72	241.0	106.0	63.7	25.5			38.1	96.0	39.7				29.8	38.7	76.9	46.9			17,355	7,632	4,583	1,834			1,874
11	Celtics	1	1956-57	72	241.4	105.5	68.9	20.3			39.0	101.8	38.3				27.5	36.7	75.0	44.8			17,380	7,599	4,963	1,464			1,851
12	Celtics	0	1957-58	72	240.3	109.9	75.0	20.9			41.8	107.8	38.7				26.4	35.9	73.7	44.5			17,305	7,916	5,402	1,508			1,723
13	Celtics	1	1958-59	72	242.8	116.4	77.8	21.8			44.6	112.7	39.5				27.3	35.6	76.6	45.3			17,480	8,379	5,601	1,568			1,769
14	Celtics	1	1959-60	75	241.0	124.5	80.2	24.7			49.9	119.6	41.7				24.7	33.6	73.4	46.3			18,075	9,337	6,014	1,849			1,856
15	Celtics	1	1960-61	79	241.3	119.7	77.6	23.7			46.8	117.7	39.8				26.1	35.6	73.3	44.9			19,060	9,460	6,131	1,872			2,032
16	Celtics	1	1961-62	80	240.9	121.1	76.0	25.6			48.2	113.9	42.3				24.7	33.9	72.8	47.0			19,275	9,687	6,080	2,049			1,909
17	Celtics	1	1962-63	80	240.9	118.8	72.7	24.5			46.8	109.7	42.7				25.2	34.7	72.5	47.5			19,275	9,504	5,818	1,960			2,090
18	Celtics	1	1963-64	80	240.9	113.0	71.7	22.0			45.2	109.6	41.3				22.6	31.1	72.5	45.8			19,275	9,042	5,736	1,760			2,125
19	Celtics	1	1964-65	80	240.9	112.8	71.9	22.2			44.6	107.6	41.4				23.6	32.3	73.1	46.3			19,275	9,024	5,748	1,772			2,065
20	Celtics	1	1965-66	80	240.3	112.7	69.9	22.4			43.6	104.6	41.7				25.5	34.5	73.9	47.0			19,225	9,014	5,591	1,795			2,012
21	Celtics	0	1966-67	81	242.2	119.3	70.4	24.2			46.0	102.8	44.7				27.4	36.6	74.8	50.2			19,615	9,664	5,703	1,962			2,138
22	Celtics	1	1967-68	82	240.3	116.1	69.1	21.9			45.0	102.1	44.0				26.2	36.4	72.1	49.2			19,705	9,523	5,666	1,798			2,147
23	Celtics	1	1968-69	82	241.8	111.0	59.0	23.8			43.7	101.4	43.1				23.6	32.4	72.9	48.0			19,830	9,102	4,840	1,953			2,073
24	Celtics	0	1969-70	82	241.2	114.9	52.9	22.9			44.5	100.4	44.3				26.0	33.1	78.6	50.0			19,780	9,422	4,336	1,875			2,320
25	Celtics	0	1970-71	82	241.2	117.2	58.9	25.0			46.4	105.1	44.2				24.4	32.3	75.5	49.1			19,780	9,608	4,833	2,052			2,138
	Average	0.2		78.4	241.6	105.4	50.3	23.8	8.1	4.8	40.3	90.5	44.6	6.2	17.4	35.7	21.0	27.7	75.8	51.4	12.2	31.7	18950.2	8268.8	3994.3	1867.8	652.4	391.1	1826.5
	Total	18		6,196	241.6	105.4	50.3	23.8	8.1	4.8	40.3	90.5	44.6	6.2	17.4	35.7	21.0	27.7	75.8	51.4	12.2	31.7	1,497,065	653,236	299,569	147,556	33,924	20,338	144,292