Compressible Flow Calculator

Compressible Flow Calculator is a fast, offline reference tool for aerodynamics and gas dynamics — built for aerospace and mechanical engineering students, educators, and practicing engineers.

Instantly compute the standard compressible flow relations used throughout supersonic and subsonic aerodynamics coursework and design work:

• Isentropic Flow — area ratios, pressure, density, and temperature ratios as functions of Mach number
• Normal Shock Waves — upstream/downstream property ratios across a normal shock
• Oblique Shock Waves — shock angle, deflection angle, and downstream Mach number relations
• Fanno Flow — adiabatic flow with friction in a constant-area duct
• Rayleigh Flow — flow with heat addition/rejection in a constant-area duct
• Scratch Pad — a built-in general-purpose calculator for quick side computations

WHY THIS APP
- Clean, modern interface with clearly organized, easy-to-read result tables
- Built-in dark mode toggle for comfortable use in any lighting
- Works completely offline — no internet connection required
- No ads, no accounts, no clutter — just the calculations you need
- Lightweight and fast, designed for quick lookups during homework, exams, or fieldwork

PRIVACY FIRST
This app does not collect, store, or transmit any personal data. All calculations happen entirely on your device using the values you enter — nothing is ever sent anywhere.

Whether you're studying compressible flow for the first time or need a quick reference during design work, Compressible Flow Calculator keeps the core gas dynamics relations one tap away.