Lab Tools

Chemistry calculators & converters

Molar mass, dilution, concentration, and CAS number tools for researchers and lab workflows.

Molar mass calculator

Enter a chemical formula (e.g. H2SO4, C6H12O6) to get molecular weight.

Chemical formula

C₁V₁ = C₂V₂ — find volume or concentration for dilutions.

C₁ (initial)

V₁ (initial vol)

C₂ (final)

V₂ (final vol)

Leave one field empty to solve for it. Use same units for concentrations and for volumes.

Convert between mg/mL, g/L, mM, M (requires molecular weight).

Molecular weight (g/mol)

Concentration value

From

Check format and validate CAS registry numbers (XXXXX-XX-X).

CAS number

Convert between mass (mg, g) and amount (mmol, mol) using molecular weight.

Molecular weight (g/mol)

Mass

Amount (moles)

Need custom compounds or bulk quotes?