Molecular Weight Calculator

With this calculator, you can calculate the molar masses of various chemical compounds. Enter the compound's formula into the field, and the calculator will provide you with the mass and show how the result was derived. Enter the symbols precisely without any extra characters, and be mindful of uppercase and lowercase letters. For example, C6H11NO or Mg3Si2H3O8.

Below the calculator, there is a table of chemical elements, where you can easily browse the names, symbols, and atomic masses of the elements.

Atomic numberNameSymbolAtomic weight
1HydrogenH1,00794
2HeliumHe4,002602
3LithiumLi6,941
4BerylliumBe9,012182
5BoronB10,811
6CarbonC12,0107
7NitrogenN14,0067
8OxygenO15,9994
9FluorineF18,9984032
10NeonNe20,1797
11SodiumNa22,98976928
12MagnesiumMg24,3050
13AluminiumAl26,9815386
14SiliconSi28,0855
15PhosphorusP30,973762
16SulfurS32,065
17ChlorineCl35,453
18ArgonAr39,948
19PotassiumK39,0983
20CalciumCa40,078
21ScandiumSc44,955912
22TitaniumTi47,867
23VanadiumV50,9415
24ChromiumCr51,9961
25ManganeseMn54,938045
26IronFe55,845
27CobaltCo58,933195
28NickelNi58,6934
29CopperCu63,546
30ZincZn65,38
31GalliumGa69,723
32GermaniumGe72,64
33ArsenicAs74,92160
34SeleniumSe78,96
35BromineBr79,904
36KryptonKr83,798
37RubidiumRb85,4678
38StrontiumSr87,62
39YttriumY88,90585
40ZirconiumZr91,224
41NiobiumNb92,906 38
42MolybdenumMo95,94
43TechnetiumTc98,9063
44RutheniumRu101,07
45RhodiumRh102,90550
46PalladiumPd106,42
47SilverAg107,8682
48CadmiumCd112,411
49IndiumIn114,818
50TinSn118,710
51AntimonySb121,760
52TelluriumTe127,60
53IodineI126,90447
54XenonXe131,293
55CaesiumCs132,9054519
56BariumBa137,327
57LanthanumLa138,90547
58CeriumCe140,116
59PraseodymiumPr140,90765
60NeodymiumNd144,242
61PromethiumPm146,9151
62SamariumSm150,36
63EuropiumEu151,964
64GadoliniumGd157,25
65TerbiumTb158,92535
66DysprosiumDy162,500
67HolmiumHo164,93032
68ErbiumEr167,259
69ThuliumTm168,93421
70YtterbiumYb173,04
71LutetiumLu174,967
72HafniumHf178,49
73TantalumTa180,9479
74TungstenW183,84
75RheniumRe186,207
76OsmiumOs190,23
77IridiumIr192,217
78PlatinumPt195,084
79GoldAu196,966569
80MercuryHg200,59
81ThalliumTl204,3833
82LeadPb207,2
83BismuthBi208,98040
84PoloniumPo208,9824
85AstatineAt209,9871
86RadonRn222,0176
87FranciumFr223,0197
88RadiumRa226,0254
89ActiniumAc227,0278
90ThoriumTh232,03806
91ProtactiniumPa231,03588
92UraniumU238,02891
93NeptuniumNp237,0482
94PlutoniumPu244,0642
95AmericiumAm243,0614
96CuriumCm247,0703
97BerkeliumBk247,0703
98CaliforniumCf251,0796
99EinsteiniumEs252,0829
100FermiumFm257,0951
101MendeleviumMd258,0986
102NobeliumNo259,1009
103LawrenciumLr266
104RutherfordiumRf267
105DubniumDb268
106SeaborgiumSg269
107BohriumBh270
108HassiumHs269
109MeitneriumMt278
110DarmstadtiumDs281
111RoentgeniumRg282
112CoperniciumCn285
113NihoniumNh286
114FleroviumFl289
115MoscoviumMc290
116LivermoriumLv293
117TennessineTs294
118OganessonOg294
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