Engineering programs are brutal in a specific way: the material is cumulative, deeply mathematical, and each course builds directly on the last. Forget how to solve a second-order differential equation and you're lost in signals and systems. Lose your grip on free body diagrams and structural analysis becomes a wall. Unlike programs where you can memorize facts in isolation, engineering demands that you retain foundational concepts across years of coursework.
Most engineering students study by grinding problem sets and re-reading textbook chapters. That works for the immediate exam, but two semesters later, you're re-learning material you supposedly mastered. When the FE exam rolls around and covers everything from freshman physics to senior-level specialty topics, you realize how much has evaporated.
Anki is a free, open-source flashcard app built on spaced repetition, a study method that shows you information right before you forget it. Medical students have used it for years. Engineering students are starting to catch on, and the results are impressive: better retention of formulas, stronger conceptual understanding, and less time re-learning old material.
Why Anki Works for Engineering
Engineering Is Cumulative
In most engineering curricula, each course assumes mastery of prerequisites. Circuits II assumes you remember Kirchhoff's laws from Circuits I. Heat transfer assumes you're comfortable with thermodynamics. Control systems assumes you know Laplace transforms from differential equations. If you've forgotten the prerequisites, you spend the first weeks of every course catching up instead of learning new material.
Spaced repetition keeps prerequisite knowledge active. When you review a card about Thevenin equivalents every few weeks, you don't have to re-derive the concept when it shows up in power systems or electronics.
Formulas Need Active Recall, Not Reference Sheets
Engineering students accumulate hundreds of formulas across their degree. Many professors allow formula sheets on exams, which creates a false sense of security. You might have the formula in front of you, but if you don't understand when to apply it or what each variable represents, it's useless.
Anki forces active recall. Instead of passively reading that Q = mcΔT, you're asked: "What is the formula for sensible heat transfer in a closed system?" You either know it or you don't. Over time, the formulas and their applications become automatic.
The FE Exam Tests Everything
The Fundamentals of Engineering exam covers mathematics, probability and statistics, ethics, engineering economics, statics, dynamics, mechanics of materials, fluid mechanics, thermodynamics, heat transfer, circuits, materials science, and your discipline-specific topics. That's essentially your entire undergraduate education in one test.
You cannot cram for the FE. The breadth is too wide. Spaced repetition is the only study method specifically designed for retaining large volumes of information over long periods. Starting Anki early in your engineering program means you arrive at FE prep with most of the material already in long-term memory.
Conceptual Understanding Beats Memorization
Engineering isn't pure memorization, but there's more memorization involved than most students admit. You need to know that stress equals force over area, that capacitors in parallel add directly while capacitors in series add reciprocally, that the Reynolds number threshold for turbulent flow is approximately 4000 for pipe flow. These facts underpin your ability to solve problems. Anki handles them efficiently so you can focus your study time on applying concepts to novel problems.
How to Structure Engineering Anki Cards
Formulas as Cloze Deletions
Cloze deletions work perfectly for formulas. They force you to recall specific parts without making you write the entire equation from memory every time.
Example:
- "Ohm's Law: V = I × R"
- "The Bernoulli equation along a streamline: P + ½ρv² + ρgh = constant"
- "Moment of inertia of a solid cylinder about its axis: ½MR²"
Concept Cards for Understanding
Don't just memorize formulas. Create cards that test when and why to use them.
Examples:
- Front: "When would you use the Mohr's circle construction?"
- Back: "To find principal stresses, maximum shear stress, and stress on an arbitrary plane for a 2D stress state. Useful when you have σx, σy, and τxy and need to find the orientation of principal planes."
- Front: "Why does adding fins to a surface improve heat transfer?"
- Back: "Fins increase the surface area available for convection. The effectiveness depends on the fin material's thermal conductivity, the convection coefficient, and the fin geometry. Fins are most effective when h is low (gas cooling) and k is high (metal fins)."
Unit Conversion and Constants
Engineering problems often go wrong because of unit errors. Keep a set of cards for critical conversions and constants.
Examples:
- "1 horsepower = 745.7 watts"
- "Standard atmospheric pressure = 101.325 kPa = 14.696 psi = 1 atm"
- "Universal gas constant R = 8.314 J/(mol·K)"
Problem-Solving Process Cards
Create cards that walk through the approach for common problem types. These aren't full problem solutions — they're the "what do I do first?" cards.
Example:
- Front: "Steps to solve a truss problem using the method of joints?"
- Back: "1. Find support reactions using equilibrium of the whole truss. 2. Start at a joint with at most 2 unknowns. 3. Draw FBD of the joint. 4. Apply ΣFx = 0 and ΣFy = 0. 5. Move to the next joint. Assume tension for unknowns; negative result means compression."
Anki by Engineering Discipline
Mechanical Engineering
Focus areas: thermodynamics (1st and 2nd law, cycles, entropy), fluid mechanics (Bernoulli, Navier-Stokes, dimensionless numbers), mechanics of materials (stress, strain, Mohr's circle, beam deflection), dynamics (Newton's laws, energy methods, vibrations), heat transfer (conduction, convection, radiation, fins, heat exchangers), and machine design (fatigue, bearings, gears, fasteners).
High-yield cards:
- Carnot efficiency formula and why it matters
- Types of heat exchangers and when to use each
- Stress concentration factors for common geometries
- The four thermodynamic processes (isobaric, isochoric, isothermal, adiabatic)
Electrical Engineering
Focus areas: circuit analysis (KVL, KCL, Thevenin, Norton, superposition), electronics (diodes, transistors, op-amps), signals and systems (Fourier, Laplace, Z-transforms, convolution), electromagnetics (Maxwell's equations, transmission lines), digital logic (Boolean algebra, flip-flops, state machines), and power systems (three-phase, transformers, motors).
High-yield cards:
- Op-amp configurations (inverting, non-inverting, summing, differential) with gain formulas
- Transistor biasing configurations and their properties
- Maxwell's equations in both integral and differential form
- Common Laplace transform pairs
Civil Engineering
Focus areas: structural analysis (trusses, beams, frames, influence lines), geotechnical (soil classification, bearing capacity, consolidation), transportation (highway design, traffic flow, LOS), hydraulics (open channel flow, pipe networks), environmental (water treatment, wastewater), and construction management (CPM, cost estimation).
High-yield cards:
- Soil classification systems (USCS and AASHTO)
- Manning's equation for open channel flow
- Load combinations from building codes
- Concrete mix design parameters
Chemical Engineering
Focus areas: material and energy balances, thermodynamics (phase equilibria, fugacity, activity coefficients), transport phenomena (momentum, heat, and mass transfer), reaction engineering (reactor design, kinetics, catalysis), separations (distillation, absorption, extraction), and process control (PID, transfer functions, stability).
High-yield cards:
- Raoult's law vs. Henry's law and when each applies
- Reactor design equations for CSTR vs. PFR
- Dimensionless numbers (Re, Nu, Pr, Sc, Sh) and their physical meaning
- McCabe-Thiele method steps for distillation
Making Cards from Lecture Slides
Engineering lectures are heavy on derivations, diagrams, and worked examples. Here's how to turn them into effective Anki cards:
- Don't card every slide. Focus on results, key assumptions, and application conditions. You don't need to memorize every step of a derivation — you need to know the starting point, the result, and when it's valid.
- Screenshot diagrams. Free body diagrams, circuit schematics, Mohr's circles, phase diagrams, and process flow diagrams are all visual. Use Anki's image occlusion feature or paste screenshots directly into cards.
- Card the "gotchas." Every engineering course has common mistakes. "Remember that gauge pressure, not absolute pressure, is used for..." — these make great cards because they prevent recurring errors.
- Use SlideToAnki. If you have lecture slides in PDF or image format, SlideToAnki can automatically generate Anki cards from them. It handles equations, diagrams, and technical content, saving hours of manual card creation.
FE Exam Prep with Anki
The FE exam is where Anki really pays off. Here's a strategy:
Start Early (Ideally Sophomore Year)
The earlier you start making cards, the less FE prep you need. If you've been reviewing your circuits cards since sophomore year, you won't need to relearn them before the exam.
Use the FE Reference Handbook
The NCEES provides a reference handbook you can use during the exam. Your Anki cards should focus on knowing when to apply each formula and what the variables mean, not on memorizing formulas you'll have in front of you. Focus on:
- Recognizing problem types quickly
- Knowing which section of the handbook to reference
- Understanding the assumptions behind each formula
- Converting between unit systems efficiently
Create a Dedicated FE Deck
In addition to your course-specific decks, create an FE deck that contains:
- Cross-cutting concepts (dimensional analysis, significant figures, unit conversion)
- Engineering economics (present worth, annual worth, rate of return)
- Ethics scenarios and the NCEES Model Rules of Professional Conduct
- Probability and statistics formulas and their applications
Practice Problems Are Still Essential
Anki handles the knowledge component. You still need to practice applying that knowledge under timed conditions. Use Anki alongside practice exams, not instead of them. The ideal workflow: review Anki in the morning (20-30 minutes), do practice problems in the afternoon.
Common Mistakes Engineering Students Make with Anki
Making Cards Too Complex
"Derive the Navier-Stokes equations from first principles" is a terrible Anki card. It's too broad and takes too long to answer. Break it into components: What assumptions reduce Navier-Stokes to the Euler equations? What does each term in the Navier-Stokes equation represent physically?
Only Carding Formulas
Formulas without context are useless. For every formula card, have at least one companion card about when to use it, what assumptions it requires, or what happens when a variable changes.
Ignoring Anki During Clinicals... er, Senior Design
Engineering students often abandon Anki during senior year when they're focused on capstone projects and job hunting. This is the worst time to stop — the FE exam is usually right after graduation. Keep your daily reviews going, even if you reduce new cards to zero.
Not Using the Right Settings
Engineering cards often need longer intervals than medical cards because the material is more interconnected. Consider adjusting your settings:
- Learning steps: 15m 1d 3d
- Graduating interval: 7 days
- Maximum interval: 180 days (or longer if you're planning for the FE exam)
- Enable FSRS if your Anki version supports it — it adapts to your actual retention patterns
Getting Started
- Download Anki from apps.ankiweb.net (free on desktop, free on Android, paid on iOS)
- Create your first deck for your current hardest course
- Make 10-15 cards from your most recent lecture
- Review daily — even 10 minutes matters
- Use SlideToAnki to speed up card creation from lecture slides and textbook screenshots
The students who do best with Anki in engineering aren't the ones who make the most cards. They're the ones who show up every day and press the button. Consistency beats volume.