Solubility from Ksp

Find the molar solubility and grams per litre of a sparingly soluble salt from its Ksp, free online.

Ksp value

Salt type

Molar mass (g/mol) — optional (optional)

About this calculator

For a salt AₘBₙ the molar solubility s satisfies Ksp = (m·s)^m (n·s)^n. Common cases: AB: s = √Ksp; AB₂: s = ∛(Ksp/4); AB₃: s = (Ksp/27)^¼; A₂B₃: s = (Ksp/108)^⅕. Activity effects and common ions are ignored.