Stock Solutions Calculator

① Compound

Search compound

SMILES (paste to auto-fill MW)

Paste any SMILES string to look up MW and formula via PubChem. Or use the search above.

Display formula (for label)

Auto-filled from search or SMILES lookup. Edit for label display.

Molecular weight (g/mol)

Use the hydrated MW if weighing a hydrate.

Purity / assay (%)

Liquid reagent (pipette volume)

Density (g/mL)

② Your Goal

Target concentration

Equivalents / mole (n-factor)

Acids/bases: H⁺ or OH⁻ donated. Redox: electrons transferred.

Final volume

Concentration expressed as

Anhydrous MW (g/mol)

Element

Atomic mass (g/mol)

Metal atoms per formula unit

Usually 1. Use 2 for e.g. Al₂(SO₄)₃.

③ Bottle Label

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Solution name

Final volume

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Components

Compound Formula MW (g/mol) Concentration Unit To weigh

Add components and a volume to see the recipe summary.

③ Bottle Label

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