Molarity Calculator

Calculate grams needed for a solution, or calculate concentration from a weighed mass.

Mass needed (given M, V, MW)
Concentration from mass (given g, V, MW)

Formula (optional)

Examples: NaCl, Ca(OH)2, K3[Fe(CN)6], MgSO4·7H2O

Molecular weight (g/mol)

Final volume (V)

Target concentration (C)

Tip: add a positive volume and molecular weight, then fill concentration or mass.

Enter either a valid formula or a molecular weight to calculate.

Tip: For buffers/mixtures, MW may be an “effective MW” or you may need component-wise calculations.