Thermodynamics Calculator8.1 - App Store

Thermodynamics Calculator puts 44 thermodynamics and heat-transfer calculators - plus a library of thermal engineering reference tables - in one fast, offline app for engineers and students.

Sizing a heat exchanger, checking a Carnot efficiency, or looking up the emissivity of a material? You get the formula, the result, and the reference data in seconds.

WHY ENGINEERS USE IT
. Solve for any variable - on most calculators, rearrange the formula and solve for whichever value you're missing, not just the "standard" output.
. SI and USCS (Imperial) units - switch the whole app between metric and imperial with one tap; every input, result, and unit label updates instantly.
. Reference tables built in - emissivity coefficients, thermal conductivity of common liquids and heat-exchanger materials, radiation constants, and more.
. Find it fast - search plus category filters: Heat Transfer, Thermal Expansion, Radiation, Energy & Work, Dimensionless Numbers, Properties & Tables.

WHO IT'S FOR
Mechanical, chemical, and HVAC engineers, and thermodynamics / heat-transfer students who want quick, reliable answers without digging through a textbook.

ALL 44 CALCULATORS

List of Calculators:
1. Carnot Efficiency (Carnot Cycle)
2. Eckert Number
3. Emissivity Coefficient
4. Energy Efficiency
5. Energy/Work Converter
6. Enthalpy
7. Entropy
8. Fick’s Law of Diffusion
9. Fouling Factor
10. Fourier Number
11. Heat Flow
12. Heat Storage
13. Heat Transfer Rate
14. Kinetic Energy
15. Laws of Thermodynamics
16. Lewis Number
17. Liquid Phase Diffusion Coefficient
18. Nusselt Number
19. Peclet Number
20. Potential Energy
21. Prandtl Number
22. Radiation Constant
23. Radiation Converter
24. Radiation Heat Transfer
25. Rankine Efficiency
26. Sherwood Number
27. Specific Heat Capacity Calculator
28. Specific Heat Capacity Converter
29. Stefan-Boltzmann Law
30. Surface Absorptivity
31. Temperature Converter
32. Thermal Area Expansion
33. Thermal Conductivity (Common Liquids)
34. Thermal Conductivity (Heat Exchanger Materials)
35. Thermal Conductivity Calculator
36. Thermal Conductivity Converter
37. Thermal Diffusivity
38. Thermal Expansion Converter
39. Thermal Linear & Volumetric Expansion Relationship
40. Thermal Linear Expansion
41. Thermal Resistivity
42. Thermal Transmittance
43. Thermal Volumetric Expansion
44. Work

Ideal for mechanical engineers and students!

Version History • Share your results as an image directly from any calculator
• Bug fixes and localization improvements 8.1 Jun 25 - Dark mode is added for a better user experience.
- updated for iOS 18 8.0 03/11/2025 optimised for iOS 16.0 7.5 03/06/2023 Formulas are presented in structured format for easy readability 7.4 04/05/2022 - Rectified an error in specific heat capacity calculator. 7.3 05/19/2021 - updated for iOS 14
- addressed an issue, which makes the App to crash, while saving the calculation to photos. 7.2 12/17/2020 All calculations are now available in both SI (Metric) & Imperial units (USCS) 7.0 03/26/2020 New user-Interface 6.0 08/17/2019 - few errors cleared 5.1 05/22/2018 - All new user interface
- Compatible with you new iPhone X 5.0 04/26/2018 - few errors cleared 4.1 06/14/2017 - updated for iOS 10 4.0 01/11/2017 - Ready for iOS 7 3.0 12/06/2013 - Improved User Interface 2.2 08/07/2013 - Compatible with iPad and iPhone
- Accepts both ( "." dot) or ("," comma) for decimal separator to support US and European formats... 2.1 02/07/2013 - Ready for iPhone5 2.0 12/20/2012 . Uses "."(period) or ","(comma) as decimal mark to meet the US and European formats...
. Easy keypad handling. 1.2 10/28/2012 1.0 04/30/2012