basic

Latent Heat of Vaporization Energy Calculator

Q = m · L_v — heat to vaporize mass m at the boiling point.

Compute the energy Q required to vaporize a substance at its boiling point from the mass and the substance-specific latent heat of vaporization L_v: Q = m · L_v. Default L_v = 2 260 000 J/kg (water → steam at 100 °C, 1 atm). Reports joules, kilojoules, and megajoules.

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

Inputs

kg
J/kg

Results

Enter values and click Calculate to see 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

Q = m · L_v

In depth

Compute the energy Q required to vaporize a substance at its boiling point from the mass and the substance-specific latent heat of vaporization L_v: Q = m · L_v. Default L_v = 2 260 000 J/kg (water → steam at 100 °C, 1 atm). Reports joules, kilojoules, and megajoules.