Molecular Weight Calculator

Molecular Weight Notes:

Enter using the format: AgS2O3 and Na3AsO16H24

The following values are used in calculations. Taken from Wikipedia (September 4, 2007) with the trailing decimals of uncertainty removed.

Table of Atomic Elements and Weights

Atomic Number	Element Name	Atomic Symbol	Atomic Weight (g/mol)
1	Hydrogen	H	1.00794
2	Helium	He	4.002602
3	Lithium	Li	6.941
4	Beryllium	Be	9.012182
5	Boron	B	10.811
6	Carbon	C	12.0107
7	Nitrogen	N	14.0067
8	Oxygen	O	15.9994
9	Fluorine	F	18.9984032
10	Neon	Ne	20.1797
11	Sodium	Na	22.98976928
12	Magnesium	Mg	24.3050
13	Aluminum	Al	26.9815386
14	Silicon	Si	28.0855
15	Phosphorus	P	30.973762
16	Sulfur	S	32.065
17	Chlorine	Cl	35.453
18	Argon	Ar	39.948
19	Potassium	K	39.0983
20	Calcium	Ca	40.078
21	Scandium	Sc	44.955912
22	Titanium	Ti	47.867
23	Vanadium	V	50.9415
24	Chromium	Cr	51.9961
25	Manganese	Mn	54.938045
26	Iron	Fe	55.845
27	Cobalt	Co	58.933195
28	Nickel	Ni	58.6934
29	Copper	Cu	63.546
30	Zinc	Zn	65.409
31	Gallium	Ga	69.723
32	Germanium	Ge	72.64
33	Arsenic	As	74.92160
34	Selenium	Se	78.96
35	Bromine	Br	79.904
36	Krypton	Kr	83.798
37	Rubidium	Rb	85.4678
38	Strontium	Sr	87.62
39	Yttrium	Y	88.90585
40	Zirconium	Zr	91.224
41	Niobium	Nb	92.906 38
42	Molybdenum	Mo	95.94
43	Technetium	Tc	98.9063
44	Ruthenium	Ru	101.07
45	Rhodium	Rh	102.90550
46	Palladium	Pd	106.42
47	Silver	Ag	107.8682
48	Cadmium	Cd	112.411
49	Indium	In	114.818
50	Tin	Sn	118.710
51	Antimony	Sb	121.760
52	Tellurium	Te	127.60
53	Iodine	I	126.90447
54	Xenon	Xe	131.293
55	Caesium	Cs	132.9054519
56	Barium	Ba	137.327
57	Lanthanum	La	138.90547
58	Cerium	Ce	140.116
59	Praseodymium	Pr	140.90765
60	Neodymium	Nd	144.242
61	Promethium	Pm	146.9151
62	Samarium	Sm	150.36
63	Europium	Eu	151.964
64	Gadolinium	Gd	157.25
65	Terbium	Tb	158.92535
66	Dysprosium	Dy	162.500
67	Holmium	Ho	164.93032
68	Erbium	Er	167.259
69	Thulium	Tm	168.93421
70	Ytterbium	Yb	173.04
71	Lutetium	Lu	174.967
72	Hafnium	Hf	178.49
73	Tantalum	Ta	180.9479
74	Tungsten	W	183.84
75	Rhenium	Re	186.207
76	Osmium	Os	190.23
77	Iridium	Ir	192.217
78	Platinum	Pt	195.084
79	Gold	Au	196.966569
80	Mercury	Hg	200.59
81	Thallium	Tl	204.3833
82	Lead	Pb	207.2
83	Bismuth	Bi	208.98040
84	Polonium	Po	208.9824
85	Astatine	At	209.9871
86	Radon	Rn	222.0176
87	Francium	Fr	223.0197
88	Radium	Ra	226.0254
89	Actinium	Ac	227.0278
90	Thorium	Th	232.03806
91	Protactinium	Pa	231.03588
92	Uranium	U	238.02891
93	Neptunium	Np	237.0482
94	Plutonium	Pu	244.0642
95	Americium	Am	243.0614
96	Curium	Cm	247.0703
97	Berkelium	Bk	247.0703
98	Californium	Cf	251.0796
99	Einsteinium	Es	252.0829
100	Fermium	Fm	257.0951
101	Mendelevium	Md	258.0986
102	Nobelium	No	259.1009
103	Lawrencium	Lr	260.1053
104	Rutherfordium	Rf	261.1087
105	Dubnium	Db	262.1138
106	Seaborgium	Sg	263.1182
107	Bohrium	Bh	262.1229
108	Hassium	Hs	265
109	Meitnerium	Mt	266
110	Darmstadtium	Ds	269
111	Roentgenium	Rg	272
112	Ununbium	Uub	285
113	Ununtrium	Uut	284
114	Ununquadium	Uuq	289
115	Ununpentium	Uup	288
116	Ununhexium	Uuh	292
118	Ununoctium	Uuo	294