EngiRef - Engineering Formulas

EngiRef is the all-in-one engineering reference app that works 100% offline. Access formulas, material properties, reference tables, and a powerful unit converter — all without internet connection. FORMULA LIBRARY Browse 70+ essential engineering formulas organized by discipline: • Mechanical Engineering: stress, strain, torque, power, gear ratios, spring design • Electrical Engineering: Ohm's law, AC/DC circuits, impedance, resonance • Civil/Structural: beam deflection, Euler buckling, Manning's equation • Thermodynamics: ideal gas law, Carnot efficiency, heat transfer • Fluid Mechanics: Bernoulli, Reynolds number, Darcy-Weisbach • Materials Science: Young's modulus, Poisson's ratio, fatigue analysis BUILT-IN CALCULATOR Enter your values and get instant results. Every calculation shows step-by-step solutions so you understand the process, not just the answer. Perfect for learning and exam preparation. MATERIALS DATABASE Access properties for 35+ engineering materials including carbon steels, stainless steels, aluminum alloys, titanium, copper, plastics, composites, concrete, and wood. Compare up to 4 materials side-by-side with density, tensile strength, elastic modulus, thermal conductivity, and more. REFERENCE TABLES • Bolt specifications: Metric M3-M30, SAE/Imperial sizes with torque specs • Pipe schedules: NPS dimensions, wall thickness, and weight • Wire gauges: AWG 0000-40 with ampacity ratings UNIT CONVERTER Convert between 16 categories including length, pressure, temperature, force, energy, flow rate, and viscosity. Accessible from any screen. PHYSICAL CONSTANTS Quick reference for fundamental constants: speed of light, gravitational constant, Boltzmann constant, Avogadro's number, and more. QUIZ MODE Test your knowledge with flashcard-style quizzes. Track progress across all disciplines. Great for FE and PE exam preparation. ADDITIONAL FEATURES • Dark and light themes (follows system setting) • Favorites to bookmark frequently used formulas • Calculation history with timestamps • Create and save custom formulas (up to 50) • Export and import your data • Responsive across phones and tablets • Material Design interface PRIVACY FOCUSED EngiRef collects zero personal data. No analytics, no tracking, no ads. All your calculations and favorites stay on your device. Whether you are a student preparing for exams, a working engineer needing quick field reference, or a technician looking for material specs — EngiRef puts essential engineering knowledge in your pocket.