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Antifreeze Protection Temperature from Ethylene Glycol Concentration Calculator

ΔT_f = Kf·m — freeze protection of ethylene glycol mix.

Calculates the freezing point depression and boiling point elevation of an ethylene glycol–water mixture using colligative properties: ΔT_f = Kf × m, where Kf(water) = 1.86 °C·kg/mol.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

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Results

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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

ΔT_f = 1.86 × m; m = 1000 × (vol% × ρ_EG) / (M_EG × water_kg)

In depth

Calculates the freezing point depression and boiling point elevation of an ethylene glycol–water mixture using colligative properties: ΔT_f = Kf × m, where Kf(water) = 1.86 °C·kg/mol.