The Freezing Point Depression Calculator computes the decrease in freezing temperature of a solution relative to the pure solvent using the formula ΔTf = i × Kf × C. Here, i is the van’t Hoff factor representing the number of particles into which a solute dissociates, Kf is the cryoscopic constant of the solvent, and C is the molality of the solute. By entering these values, the calculator outputs the freezing point depression in °C and displays the formula substitution. This is useful for chemistry students and researchers studying colligative properties, solution behavior, and freezing point manipulation in chemical and biological systems.