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Calcimator

Molar Mass Calculator

Calculate molar mass, convert between grams and moles, and find the number of molecules for elements and common compounds.

Inputs

Results

Molar Mass

18.02 g/mol

SubstanceWater (H₂O)
Mass100 g
Moles5.55 mol
Molecules3.343e+24
How to Use This Calculator
  1. Select mode: single element lookup or compound formula.
  2. For single element: select from the periodic table list to get atomic mass.
  3. For compound: enter the formula (e.g., H2O, NaCl) to calculate total molar mass.
  4. Review molar mass in g/mol and use it to convert between grams and moles.
  5. Use for solution preparation, stoichiometry problems, and laboratory calculations.

What each input means

Mode
Calculation mode to use.
Unit
Measurement system to use.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Mode = 1, Element = 2, Compound = 0, Quantity = 100 = 5 input(s) provided
  2. Calculate Molar Mass
    18.015 = 18.015
  3. Calculate Substance
    Substance = `${selectedName
    Water (H₂O) = Water (H₂O)
  4. Calculate Mass
    Mass
    100 = 100

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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