Boiling Point Elevation Calculator

Find how much a solute raises the boiling point.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

This calculator computes boiling point elevation using ΔTb = i·Kb·m, where i is the van't Hoff factor (number of particles a solute dissociates into), Kb is the ebullioscopic constant of the solvent (0.512 °C·kg/mol for water), and m is the solution's molality.

Chemistry students and lab technicians use it to predict how much dissolving a solute — like salt in water — raises the boiling point above the pure solvent's, a colligative property that depends only on particle count, not solute identity. Enter the molality, van't Hoff factor, and Kb to get the elevation and new boiling point.

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