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.
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High-performance rendering for complex interactive simulations.
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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
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Corrosion Rate Calculator (ASTM G31 / Electrochemical / Thickness-Loss)
Free advanced-engineering-tool corrosion rate calculator supporting all 3 ASTM methods: weight-loss (ASTM G31), thickness-loss with remaining life, and electrochemical Tafel extrapolation. 30+ alloy database, 15+ environments, animated Tafel plots, severity classification, and export reports. No free tool covers all three methods — this one does.
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Heat Pump Noise Setback Visualizer
Free heat pump noise distance calculator with ISO 9613-2 sound propagation modeling. Visualize noise contours, check compliance with local noise ordinances, compare quiet unit options, and determine minimum setback distances. Includes barrier attenuation, dBA gauge, and exportable compliance reports.
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Packed Tower Pressure Drop Flooding Calculator: GPDC Hydraulic Design & Rating
Professional packed tower hydraulic calculator using Strigle-modified GPDC (Generalized Pressure Drop Correlation). Calculate pressure drop, flooding velocity, capacity factor, and operating range for random and structured packings. Includes Eckert/Strigle/Kister correlations, 30+ packing types with Fp data, liquid holdup estimation, HETP comparison, column sizing, animated column cross-section with gas/liquid flow visualization, and export reports. References Perry 9th Ed, Strigle 1994, Kister 1992, and GPSA Engineering Data Book.
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PID Controller Tuning Simulator
Free PID controller tuning simulator. Adjust proportional, integral, and derivative gains to optimize step response. Visualize overshoot, settling time, and steady-state error in real-time. Perfect for control engineering students. Try it free!
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Corporate Accounting Simulation
Free interactive corporate accounting simulator with journal entries, T-accounts, financial statement generation, ratio analysis, GAAP vs IFRS comparison, and depreciation methods. Supports transaction engine, chart of accounts, income statement, balance sheet, and cash flow statement. Built for CPA candidates, accounting students, and finance professionals.
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UV-Vis Spectrophotometer Simulator: Interactive Beer-Lambert Absorbance Spectrum Analyzer
Interactive UV-Vis spectrophotometer simulator with animated optical bench, Beer-Lambert law calculations, mixture deconvolution, stray light effects, and calibration curve generation. Adjust wavelength, concentration, path length, molar absorptivity, noise, and stray light in real-time. Free analytical chemistry tool for students, QC analysts, and researchers.
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Recently published simulations fresh from our lab
Manifold Learning Explorer: Projecting High-Dimensional Data with t-SNE and UMAP
Interactive manifold learning explorer. Project Swiss roll, S-curve, clusters, and sphere data from 3D to 2D using t-SNE, UMAP, PCA, and Isomap side by side. Watch the embedding relax frame by frame, tune perplexity and n_neighbors, and see why a flat 2D picture can hide very different high-dimensional structure.
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Galaxy Collision Simulator
Real-time N-body simulator of two disk galaxies colliding. Set the mass ratio, pericenter, approach speed, disk size and inclination, then watch tidal tails and bridges emerge from pure gravity in the Toomre & Toomre style.
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Cloud Formation Simulator
Watch a rising air parcel cool, saturate, and build a cloud in this interactive meteorology simulator. Set surface temperature, dew point, and humidity, choose a lifting mechanism (convective, orographic, frontal), and trace the parcel path on a skew-T-style diagram. Computes the lifting condensation level (LCL), cloud base and top, level of free convection, CAPE, CIN, and atmospheric stability. Free educational tool for Earth science and meteorology students.
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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Browse simulations organized by subject area
Astronomy
Stars, planets, galaxies
13 simulationsBiology
Cells, genetics, ecosystems
33 simulationsChemistry
Reactions, molecules, elements
26 simulationsComputer Science
Algorithms, data structures
71 simulationsEarth Science
Geology, weather, climate
17 simulationsEngineering
Structures, circuits, systems
425 simulationsFinance & Economics
Financial concepts, investment strategies, and economic principles.
45 simulationsHealth
Body systems, disease prevention, and wellness.
38 simulationsMathematics
Algebra, geometry, calculus
30 simulationsPhysics
Mechanics, waves, thermodynamics
73 simulationsSocial Sciences
Policy models, social dynamics, and decision-making.
26 simulationsReady to Get Started?
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