Interactive Simulations& Professional Engineering Tools
Free simulators, calculators, and analysis tools for science, engineering, and finance. From beam deflection to thermodynamic cycles, structural analysis to portfolio optimization — explore, calculate, and verify.
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Our platform combines cutting-edge technology with educational best practices.
WebGPU Powered
High-performance rendering for complex interactive simulations.
AI Assistant
Your own AI assistant running locally in your browser. No subscriptions, no fees.
Interactive Learning
Adjust parameters in real-time and visualize complex concepts.
SimLab — Compute Anything in Your Browser
510+ MATLAB®-compatible functions. Matrix operations, symbolic math, plotting, signal processing, control systems, and more. No installation. No license fees.
- ✓ Full programming: for loops, functions, if/else
- ✓ Interactive plotting with Plotly.js
- ✓ 16 ready-to-run example scripts
- ✓ MATLAB® costs $2,150+/year — SimLab is free
Trending Simulations
Trending today
Digital Logic Gates Simulator
Interactive logic gate simulator with all 7 gates (AND, OR, NOT, NAND, NOR, XOR, XNOR), truth tables, Boolean expressions, Karnaugh maps, timing diagrams, 7400 IC pinouts, and circuit presets. Perfect for CS and EE students.
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Monte Carlo Portfolio Simulator
Professional Monte Carlo retirement and investment portfolio simulator with multi-asset modeling (stocks, bonds, REITs, cash), annual or monthly withdrawals, Geometric Brownian Motion with Cholesky-decomposed correlated returns, and 3 withdrawal strategies (fixed dollar, 4% rule, simplified Guyton-Klinger-style guardrails). Includes sequence-of-returns risk visualization, success probability analysis, and percentile wealth paths across 1,000-10,000 scenarios.
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Semiconductor Simulator - Intrinsic Carrier Concentration Calculator
Explore semiconductors with our free P-N junction simulator. Adjust doping, temperature, and bias to visualize carrier dynamics and band diagrams. Perfect for EE students. Try it now!
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Market Microstructure Simulator
Interactive market microstructure simulator with real-time limit order book visualization, bid-ask spread dynamics, price impact models (Kyle lambda, Almgren-Chriss), VWAP/TWAP execution, flash crash cascades, and HFT competition. Explore order types, market maker behavior, and trading algorithms.
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Wood Beam Span Calculator — Lumber Sizing per NDS & IRC
NDS 2024-compliant wood beam span calculator with species/grade selection, bending/shear/deflection checks, adjustment factors, and animated beam visualization. Supports lumber, glulam, and LVL members.
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Bridge Stress Simulator
Explore bridge stress with our free interactive truss simulator. Adjust loads and bridge types to visualize tension and compression. Perfect for engineering students. Try it now!
View SimulationNewest Simulations
Recently published simulations fresh from our lab
Optimum Autofrettage Pressure Solver: Quartic Fits, Flat Optima and Sobol Uncertainty
Free optimum autofrettage pressure calculator. Differentiate FE-fitted quartics of bore hoop stress for a 15-5PH thick cylinder, find the 960 / 937 / 882 MPa optima, check ASME KD-521(c) overstrain under von Mises and Tresca, and attach uncertainty to every input with live Sobol indices.
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Shakedown Boundary Calculator: Autofrettaged Cylinder Bree Map with Melan Elastic-Shakedown Limit
Free elastic-shakedown calculator for thick-walled autofrettaged cylinders. Drag the operating point on a live Bree-style map of pulsating pressure against through-wall temperature range, see which limit it breaks first, and get the minimal pressure or temperature cut back to shakedown.
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Cracked Cylinder Prototype Similarity Checker: Fracture Test Scaling and Size Effect
Free fracture-similitude tool for down-scaled cracked cylinders. Set a/W, r_i/r_o, (p_i - p_o)/sigma_y and r_p/W, pick a scale factor, and the tool builds the original and prototype, audits J scaling, plastic-zone size ratio, crack-tip offset and the ASTM E399 size rule, then solves in closed form for the largest scale-down you can trust.
View SimulationYour Personal AI Tutor — Running Locally in Your Browser
Meet your new study companion. Our AI Tutor runs entirely on your device using WebGPU — no cloud servers, no subscriptions, no data leaving your computer. Choose from three models based on your device's capabilities and get instant help understanding any simulation.
Lite
~1.4 GB • Desktops, laptops & Chrome iOS (experimental)
Fast responses for quick questions. Perfect for phones, tablets, and older laptops.
Standard
~2 GB • Desktops & laptops only
Best balance of speed and quality. Great for most laptops and desktops.
Advanced
~2.3 GB • Desktops & laptops only
Best reasoning for complex physics problems. Requires modern GPU with 4GB+ VRAM.
Device Compatibility
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Astronomy
Stars, planets, galaxies
23 simulationsBiology
Cells, genetics, ecosystems
49 simulationsChemistry
Reactions, molecules, elements
34 simulationsComputer Science
Algorithms, data structures
85 simulationsEarth Science
Geology, weather, climate
36 simulationsEngineering
Structures, circuits, systems
506 simulationsFinance & Economics
Financial concepts, investment strategies, and economic principles.
50 simulationsHealth
Body systems, disease prevention, and wellness.
45 simulationsMathematics
Algebra, geometry, calculus
48 simulationsPhysics
Mechanics, waves, thermodynamics
109 simulationsSocial Sciences
Policy models, social dynamics, and decision-making.
26 simulationsReady to Get Started?
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