Tabla de equivalencias pulgadas a mm: fracciones, decimales y brocas

Fracciones de pulgada en 64avos hasta 3", decimal y milímetros, más brocas de número y de letra. Formato doble carta horizontal (tabloide 11 × 17").

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Tabla de equivalencias

Fracción · decimal · milímetros

Fracciones de 0 a 1"

Fracción	Decimal (in)	mm
1/64	0.0156	0.40
1/32	0.0312	0.79
3/64	0.0469	1.19
1/16	0.0625	1.59
5/64	0.0781	1.98
3/32	0.0938	2.38
7/64	0.1094	2.78
1/8	0.1250	3.17
9/64	0.1406	3.57
5/32	0.1562	3.97
11/64	0.1719	4.37
3/16	0.1875	4.76
13/64	0.2031	5.16
7/32	0.2188	5.56
15/64	0.2344	5.95
1/4	0.2500	6.35
17/64	0.2656	6.75
9/32	0.2812	7.14
19/64	0.2969	7.54
5/16	0.3125	7.94
21/64	0.3281	8.33
11/32	0.3438	8.73
23/64	0.3594	9.13
3/8	0.3750	9.52
25/64	0.3906	9.92
13/32	0.4062	10.32
27/64	0.4219	10.72
7/16	0.4375	11.11
29/64	0.4531	11.51
15/32	0.4688	11.91
31/64	0.4844	12.30
1/2	0.5000	12.70
33/64	0.5156	13.10
17/32	0.5312	13.49
35/64	0.5469	13.89
9/16	0.5625	14.29
37/64	0.5781	14.68
19/32	0.5938	15.08
39/64	0.6094	15.48
5/8	0.6250	15.88
41/64	0.6406	16.27
21/32	0.6562	16.67
43/64	0.6719	17.07
11/16	0.6875	17.46
45/64	0.7031	17.86
23/32	0.7188	18.26
47/64	0.7344	18.65
3/4	0.7500	19.05
49/64	0.7656	19.45
25/32	0.7812	19.84
51/64	0.7969	20.24
13/16	0.8125	20.64
53/64	0.8281	21.03
27/32	0.8438	21.43
55/64	0.8594	21.83
7/8	0.8750	22.22
57/64	0.8906	22.62
29/32	0.9062	23.02
59/64	0.9219	23.42
15/16	0.9375	23.81
61/64	0.9531	24.21
31/32	0.9688	24.61
63/64	0.9844	25.00
1	1.0000	25.40

Fracciones de 1 a 2"

Fracción	Decimal (in)	mm
1 1/64	1.0156	25.80
1 1/32	1.0312	26.19
1 3/64	1.0469	26.59
1 1/16	1.0625	26.99
1 5/64	1.0781	27.38
1 3/32	1.0938	27.78
1 7/64	1.1094	28.18
1 1/8	1.1250	28.57
1 9/64	1.1406	28.97
1 5/32	1.1562	29.37
1 11/64	1.1719	29.77
1 3/16	1.1875	30.16
1 13/64	1.2031	30.56
1 7/32	1.2188	30.96
1 15/64	1.2344	31.35
1 1/4	1.2500	31.75
1 17/64	1.2656	32.15
1 9/32	1.2812	32.54
1 19/64	1.2969	32.94
1 5/16	1.3125	33.34
1 21/64	1.3281	33.73
1 11/32	1.3438	34.13
1 23/64	1.3594	34.53
1 3/8	1.3750	34.92
1 25/64	1.3906	35.32
1 13/32	1.4062	35.72
1 27/64	1.4219	36.12
1 7/16	1.4375	36.51
1 29/64	1.4531	36.91
1 15/32	1.4688	37.31
1 31/64	1.4844	37.70
1 1/2	1.5000	38.10
1 33/64	1.5156	38.50
1 17/32	1.5312	38.89
1 35/64	1.5469	39.29
1 9/16	1.5625	39.69
1 37/64	1.5781	40.08
1 19/32	1.5938	40.48
1 39/64	1.6094	40.88
1 5/8	1.6250	41.27
1 41/64	1.6406	41.67
1 21/32	1.6562	42.07
1 43/64	1.6719	42.47
1 11/16	1.6875	42.86
1 45/64	1.7031	43.26
1 23/32	1.7188	43.66
1 47/64	1.7344	44.05
1 3/4	1.7500	44.45
1 49/64	1.7656	44.85
1 25/32	1.7812	45.24
1 51/64	1.7969	45.64
1 13/16	1.8125	46.04
1 53/64	1.8281	46.43
1 27/32	1.8438	46.83
1 55/64	1.8594	47.23
1 7/8	1.8750	47.62
1 57/64	1.8906	48.02
1 29/32	1.9062	48.42
1 59/64	1.9219	48.82
1 15/16	1.9375	49.21
1 61/64	1.9531	49.61
1 31/32	1.9688	50.01
1 63/64	1.9844	50.40
2	2.0000	50.80

Fracciones de 2 a 3"

Fracción	Decimal (in)	mm
2 1/64	2.0156	51.20
2 1/32	2.0312	51.59
2 3/64	2.0469	51.99
2 1/16	2.0625	52.39
2 5/64	2.0781	52.78
2 3/32	2.0938	53.18
2 7/64	2.1094	53.58
2 1/8	2.1250	53.97
2 9/64	2.1406	54.37
2 5/32	2.1562	54.77
2 11/64	2.1719	55.17
2 3/16	2.1875	55.56
2 13/64	2.2031	55.96
2 7/32	2.2188	56.36
2 15/64	2.2344	56.75
2 1/4	2.2500	57.15
2 17/64	2.2656	57.55
2 9/32	2.2812	57.94
2 19/64	2.2969	58.34
2 5/16	2.3125	58.74
2 21/64	2.3281	59.13
2 11/32	2.3438	59.53
2 23/64	2.3594	59.93
2 3/8	2.3750	60.32
2 25/64	2.3906	60.72
2 13/32	2.4062	61.12
2 27/64	2.4219	61.52
2 7/16	2.4375	61.91
2 29/64	2.4531	62.31
2 15/32	2.4688	62.71
2 31/64	2.4844	63.10
2 1/2	2.5000	63.50
2 33/64	2.5156	63.90
2 17/32	2.5312	64.29
2 35/64	2.5469	64.69
2 9/16	2.5625	65.09
2 37/64	2.5781	65.48
2 19/32	2.5938	65.88
2 39/64	2.6094	66.28
2 5/8	2.6250	66.67
2 41/64	2.6406	67.07
2 21/32	2.6562	67.47
2 43/64	2.6719	67.87
2 11/16	2.6875	68.26
2 45/64	2.7031	68.66
2 23/32	2.7188	69.06
2 47/64	2.7344	69.45
2 3/4	2.7500	69.85
2 49/64	2.7656	70.25
2 25/32	2.7812	70.64
2 51/64	2.7969	71.04
2 13/16	2.8125	71.44
2 53/64	2.8281	71.83
2 27/32	2.8438	72.23
2 55/64	2.8594	72.63
2 7/8	2.8750	73.02
2 57/64	2.8906	73.42
2 29/32	2.9062	73.82
2 59/64	2.9219	74.22
2 15/16	2.9375	74.61
2 61/64	2.9531	75.01
2 31/32	2.9688	75.41
2 63/64	2.9844	75.80
3	3.0000	76.20

Brocas número #1 a #40

Broca	Decimal (in)	mm
#1	0.2280	5.79
#2	0.2210	5.61
#3	0.2130	5.41
#4	0.2090	5.31
#5	0.2055	5.22
#6	0.2040	5.18
#7	0.2010	5.11
#8	0.1990	5.05
#9	0.1960	4.98
#10	0.1935	4.91
#11	0.1910	4.85
#12	0.1890	4.80
#13	0.1850	4.70
#14	0.1820	4.62
#15	0.1800	4.57
#16	0.1770	4.50
#17	0.1730	4.39
#18	0.1695	4.31
#19	0.1660	4.22
#20	0.1610	4.09
#21	0.1590	4.04
#22	0.1570	3.99
#23	0.1540	3.91
#24	0.1520	3.86
#25	0.1495	3.80
#26	0.1470	3.73
#27	0.1440	3.66
#28	0.1405	3.57
#29	0.1360	3.45
#30	0.1285	3.26
#31	0.1200	3.05
#32	0.1160	2.95
#33	0.1130	2.87
#34	0.1110	2.82
#35	0.1100	2.79
#36	0.1065	2.71
#37	0.1040	2.64
#38	0.1015	2.58
#39	0.0995	2.53
#40	0.0980	2.49

Brocas número #41 a #80

Broca	Decimal (in)	mm
#41	0.0960	2.44
#42	0.0935	2.37
#43	0.0890	2.26
#44	0.0860	2.18
#45	0.0820	2.08
#46	0.0810	2.06
#47	0.0785	1.99
#48	0.0760	1.93
#49	0.0730	1.85
#50	0.0700	1.78
#51	0.0670	1.70
#52	0.0635	1.61
#53	0.0595	1.51
#54	0.0550	1.40
#55	0.0520	1.32
#56	0.0465	1.18
#57	0.0430	1.09
#58	0.0420	1.07
#59	0.0410	1.04
#60	0.0400	1.02
#61	0.0390	0.99
#62	0.0380	0.97
#63	0.0370	0.94
#64	0.0360	0.91
#65	0.0350	0.89
#66	0.0330	0.84
#67	0.0320	0.81
#68	0.0310	0.79
#69	0.0292	0.74
#70	0.0280	0.71
#71	0.0260	0.66
#72	0.0250	0.64
#73	0.0240	0.61
#74	0.0225	0.57
#75	0.0210	0.53
#76	0.0200	0.51
#77	0.0180	0.46
#78	0.0160	0.41
#79	0.0145	0.37
#80	0.0135	0.34

Brocas letra A a Z

Broca	Decimal (in)	mm
A	0.234	5.94
B	0.238	6.05
C	0.242	6.15
D	0.246	6.25
E	0.250	6.35
F	0.257	6.53
G	0.261	6.63
H	0.266	6.76
I	0.272	6.91
J	0.277	7.04
K	0.281	7.14
L	0.290	7.37
M	0.295	7.49
N	0.302	7.67
O	0.316	8.03
P	0.323	8.20
Q	0.332	8.43
R	0.339	8.61
S	0.348	8.84
T	0.358	9.09
U	0.368	9.35
V	0.377	9.58
W	0.386	9.80
X	0.397	10.08
Y	0.404	10.26
Z	0.413	10.49

Fórmulas

1" = 25.4 mm

mm = pulgadas × 25.4

pulgadas = mm ÷ 25.4

Fracción → decimal: numerador ÷ denominador (5/16 = 0.3125)

Decimal → 64avos: decimal × 64 y redondea (0.3 × 64 = 19.2 → 19/64)

Milésima: 0.001" = 0.0254 mm · Micra: 0.001 mm

En negritas de fondo gris: fracciones en 16avos. Valores calculados con 1" = 25.4 mm exactos.CORTECH · Francisco Márquez #508, Col. Obrera, Monterrey, N.L. · 81 8334 5420 · info@cortech.com.mx

Tabla de equivalencias: fracción de pulgada, decimal y milímetros

Tabla de equivalencias

Fracción · decimal · milímetros

Fórmulas

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