Latent Heat Calculator

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Calculates the heat absorbed or released during a phase change (melting, boiling) at constant temperature (Q=mL).

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Mass of Substance and Latent Heat of Phase Change in the units shown.

Step 2

Read Heat Energy (Q) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

See the inputs and their calculated results.

Mass of Substance: 1 kg; Latent Heat of Phase Change: Water (Fusion/Melting): 334,000 J/kg

Heat Energy (Q): 334,000 J

Mass of Substance: 1 kg; Latent Heat of Phase Change: Water (Vaporization/Boiling): 2,260,000 J/kg

Heat Energy (Q): 2,260,000 J

Mass of Substance: 1 kg; Latent Heat of Phase Change: Aluminum (Fusion/Melting): 397,000 J/kg

Heat Energy (Q): 397,000 J

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