When to use this calculator
Use fusion or vaporisation latent heat matching the substance and phase transition.
Explore the heat & thermal change calculators for other questions in this topic. For a related calculation, use the Stefan Boltzmann Radiation Calculator: Estimate net radiative heat transfer with a stated emissivity.
PUTTING IT INTO PRACTICE
Latent Heat: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Mass (kg) | 2 |
| Specific latent heat (J/kg) | 334,000 |
| Result | 668,000 J |
- Check the input labels and enter the example values above.
- Apply the relationship: Energy = mass × specific latent heat.
- The result is 668,000 J, rounded for display.
How to interpret your result
Does not include the energy needed to reach the phase-change temperature.
Heating within a phase uses specific heat; phase changes use latent heat. Material properties vary with temperature. Ideal conduction calculations omit several real-world heat-transfer paths.
Frequently asked questions
Does heating energy include boiling automatically?
No. Energy to reach a boiling temperature and latent energy to vaporise liquid are separate contributions.
When is the latent heat calculator useful?
Use fusion or vaporisation latent heat matching the substance and phase transition.
How do I use the latent heat calculator?
Enter mass (kg), specific latent heat (j/kg). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Energy = mass × specific latent heat.
What should I check before using the result?
Does not include the energy needed to reach the phase-change temperature.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
Further reading
For background on this topic, see OpenStax: thermal expansion ↗. This is a topic reference, not an external review or endorsement of this tool.
Calculators Map editorial process · Updated · Methods and limitations