Calculate molar mass (calculate molecular weight, Molar Mass Calculator).Formula:O18 -- e-Tools Age

	Calculate molar mass
	Enter a chemical formula in the field below, pay attention to formula is case sensitive!!!	The formula should be entered as: H₂SO₄= H2SO4 CuSO₄.5H2O=CuSO4.5H2O 3BeO.Al2O₃.6SiO₂= (BeO)3.Al2O3.6SiO2

Calculations:
Formula: O18
Molar Mass: 287.982 g/mol        1g=3.47243924967533E-03 mol
Percent composition (by mass):
Element  Count           Atom Mass                %(by mass)
O                  18                15.999                        100%

Top Use: Molar Mass Calculator Formula: Co2(Cr2O7)3 Recent user inquiry: 12/14/2025 22:57Molar Mass Calculator Formula: HnO 12/14/2025 22:57Molar Mass Calculator Formula: CuSO4*5H30 12/14/2025 22:57Molar Mass Calculator Formula: CH2CHCH2CH3 12/14/2025 22:57Molar Mass Calculator Formula: C3o18H2 12/14/2025 22:57Molar Mass Calculator Formula: (CuSO4.H2O)