For engineering students

Thermodynamic cycles,
solved.

A precise, beautiful calculator for Carnot, Otto, Diesel, Brayton, Rankine, refrigeration cycles and more. Available in 25 languages.

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See it in action

Built for engineering students

Clean interface, step-by-step calculations, and comprehensive thermodynamic tables.

Home screen with all cycles
Rankine cycle diagram
Rankine cycle state values
Rankine cycle processes
Step-by-step calculations
Property calculator
Heat pump refrigeration cycle
Otto cycle calculator
Capabilities

Every cycle your textbook covers

From introductory thermodynamics to advanced power systems — all with step-by-step state calculations.

01

Gas Power Cycles

  • Free Carnot Cycle Try it
  • Free Otto Cycle Try it
  • Paid Diesel Cycle
  • Paid Brayton Cycle
  • Paid Regenerative Brayton
02

Vapor Power Cycles

  • Free Rankine Cycle Try it
  • Paid Reheated Rankine
  • Paid Open Feedwater Heater
  • Paid Closed Feedwater Heater
  • Paid Flash Chamber
03

Refrigeration Cycles

  • Paid Heat Pump / Refrigeration
  • Paid Cascading Refrigeration

25 Languages

Fully translated interface including all cycle diagrams, labels, and UI elements.

SI & Imperial

Switch between metric and imperial units. Calculations adapt automatically.

No Data Collection

All calculations run on-device. No analytics, no tracking, no accounts required.

Textbook Accurate

Uses published steam tables and R-134a data with standard thermodynamic formulas.

Thermo Cycles

Get Thermo Cycles

Free to download. Three cycles included free — unlock more with optional in-app purchases.

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Download on macOS

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