Grams to Moles Calculator
moles = grams ÷ molar mass · grams = moles × molar mass.
Molar masses of common lab chemicals
| Compound | Molar mass (g/mol) | 1 g = |
|---|---|---|
| Water (H₂O) | 18.015 | 55.51 mmol |
| Sodium chloride (NaCl) | 58.44 | 17.11 mmol |
| Glucose (C₆H₁₂O₆) | 180.16 | 5.55 mmol |
| Sodium hydroxide (NaOH) | 40 | 25.00 mmol |
| Tris base | 121.14 | 8.25 mmol |
| Glycine | 75.07 | 13.32 mmol |
Making a solution? Use the molarity calculator. Peptide molar mass: peptide MW calculator.
FAQ
How do I convert grams to moles?
Divide the mass by the molar mass: moles = grams ÷ g/mol. Example: 58.44 g of NaCl ÷ 58.44 g/mol = 1 mol.
How do I convert moles to grams?
Multiply moles by the molar mass: grams = moles × g/mol.
Where do I get the molar mass?
Add the atomic masses of every atom in the formula, or read it from the reagent label. For peptides, use the peptide molecular weight calculator.
How many molecules are in a mole?
Avogadro’s number: 6.022 × 10²³ particles per mole.
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