Grams to moles calculator

Find a chemical by CAS number or name and convert grams to moles using its source-linked molar mass.

Calculate an amount

Calculation basis

n = m / M

Amount in mol = mass in g ÷ molar mass in g/mol.

This calculation assumes the pure substance described by the source record. For hydrates, salts, mixtures or materials with a specified purity, confirm the correct identity and adjust the inputs appropriately. Each substance page also supports reverse conversion.