Molar Mass Calculator

Molar Mass is evaluated from Element 1, Atoms of Element 1 and Element 2. The calculation reports Molar Mass, Mass of 1 mol and Mass of 1 mmol.

Results

Thanks — we’ve logged this for review.

About the Molar Mass Calculator

Molar Mass is treated here as a quantitative relation between Element 1, Atoms of Element 1, Element 2 and Atoms of Element 2 and Molar Mass, Mass of 1 mol and Mass of 1 mmol.

The calculator uses a multi formula configuration. Each reported value is read as a direct evaluation of the stored rules with the declared field formats and units.

Formula basis:
M (g/mol) = n₁ x M₁ + n₂ x M₂ + n₃ x M₃
where nᵢ = atom count, Mᵢ = atomic mass (g/mol)
Example - Water (H₂O):
M = 2 x 1.008 + 1 x 15.999 = 2.016 + 15.999 = 18.015 g/mol

Interpret the outputs in the order shown by the result fields. Optional inputs affect only the outputs that depend on those variables.

Formula & How It Works

The calculation applies the following relations exactly as recorded in the metadata:

M (g/mol) = n₁ x M₁ + n₂ x M₂ + n₃ x M₃
where nᵢ = atom count, Mᵢ = atomic mass (g/mol)
Example - Water (H₂O):
M = 2 x 1.008 + 1 x 15.999 = 2.016 + 15.999 = 18.015 g/mol

Each output field is produced by substituting the supplied inputs into the relevant relation and then applying the declared rounding or text format.

Worked Examples

Example 1: Water — H₂O

Inputs

element1: H count1: 2 element2: O count2: 1 element3:
Molar Mass: 42 g/mol. Mass of 1 mol: 42 g. Mass of 1 mmol: 42 mg

With Element 1 = H, Atoms of Element 1 = 2, Element 2 = O and Atoms of Element 2 = 1 as the stated inputs, the result is Molar Mass = 42 g/mol, Mass of 1 mol = 42 g and Mass of 1 mmol = 42 mg. Each value corresponds to the declared output fields.

Example 2: Sodium Chloride — Table Salt (NaCl)

Inputs

element1: Na count1: 1 element2: Cl count2: 1 element3:
Molar Mass: 42 g/mol. Mass of 1 mol: 42 g. Mass of 1 mmol: 42 mg

With Element 1 = Na, Atoms of Element 1 = 1, Element 2 = Cl and Atoms of Element 2 = 1 as the stated inputs, the result is Molar Mass = 42 g/mol, Mass of 1 mol = 42 g and Mass of 1 mmol = 42 mg. Each value corresponds to the declared output fields.

Example 3: Glucose — C₆H₁₂O₆

Inputs

element1: C count1: 6 element2: H count2: 12 element3: O count3: 6
Molar Mass: 42 g/mol. Mass of 1 mol: 42 g. Mass of 1 mmol: 42 mg

With Element 1 = C, Atoms of Element 1 = 6, Element 2 = H and Atoms of Element 2 = 12 as the stated inputs, the result is Molar Mass = 42 g/mol, Mass of 1 mol = 42 g and Mass of 1 mmol = 42 mg. Each value corresponds to the declared output fields.

Example 4: Aspirin — C₉H₈O₄ (Acetylsalicylic Acid)

Inputs

element1: C count1: 9 element2: H count2: 8 element3: O count3: 4
Molar Mass: 42 g/mol. Mass of 1 mol: 42 g. Mass of 1 mmol: 42 mg

With Element 1 = C, Atoms of Element 1 = 9, Element 2 = H and Atoms of Element 2 = 8 as the stated inputs, the result is Molar Mass = 42 g/mol, Mass of 1 mol = 42 g and Mass of 1 mmol = 42 mg. Each value corresponds to the declared output fields.

Common Use Cases

  • Find the molar mass of water (H₂O)
  • Calculate molar mass of glucose (C₆H₁₂O₆)
  • Determine grams per mole for any chemical compound