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.
Why Choose Simulations4All?
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
ECG Signal Simulator & Interpreter
Free interactive ECG simulator with real-time sweep-mode waveform on a clinical monitor display. Animated heart diagram beats in sync with PQRST. Explore 9 rhythms including Normal Sinus, AFib, VTach, AV Blocks with adjustable heart rate (30-200 bpm), P/QRS/QT/ST parameters, lead selection (I-aVF), noise generators, and clickable interval measurement overlays.
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Six-Model Machine Learning Laboratory
Compare linear regression, logistic regression, KNN, K-means, a Gini decision tree, and a linear soft-margin SVM on one deterministic 2D dataset with exact metrics, bounded steps, and reproducible state.
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RAG Pipeline Simulator
Interactive step-by-step visualization of Retrieval-Augmented Generation. Explore vector search, document chunking, prompt construction, and failure modes with animated pipeline stages, 2D vector space, and side-by-side comparisons.
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Seasons Simulator - Earth Axial Tilt & Day Length
Free seasons simulator showing how Earth's 23.5° axial tilt creates seasons. Visualize solstices, equinoxes, day length changes, and sunlight angles throughout the year.
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Digital Modulation Techniques Visualizer
Free interactive digital modulation simulator. Visualize ASK, FSK, BPSK, QPSK, 8-PSK, 16-QAM, and 64-QAM with constellation diagrams, bit error rate analysis, and spectral density. Essential for communications engineering students.
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Renal Physiology Nephron Simulator
Free interactive nephron simulator modeling glomerular filtration rate (GFR), tubular reabsorption, secretion, countercurrent multiplication, and electrolyte handling (Na+, K+, Cl-, HCO3-). Visualize Starling forces at the glomerulus, tubuloglomerular feedback, RAAS activation, and diuretic mechanisms with animated nephron diagrams and real-time concentration gradients. Explore clinical scenarios including dehydration, diabetes mellitus, heart failure, and CKD staging. Export clinical analysis reports and test knowledge with a built-in quiz.
View SimulationNewest Simulations
Recently published simulations fresh from our lab
Galton-Watson Branching Process Lab: Extinction Probability and Surname Survival
Free Galton-Watson branching process simulator: choose a Poisson, binomial or custom offspring distribution and get the exact extinction probability (smallest root of G(s) = s), extinction by generation, mean and variance of generation size, and a seeded Monte Carlo check of thousands of lineages, with a male-line surname mode.
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Drake Equation & Fermi Paradox Explorer (Monte-Carlo Uncertainty)
Free Drake equation calculator with Monte Carlo uncertainty: set each factor as a point value or a log-uniform range, see the full distribution of N, the probability that N is below one, which factor drives the uncertainty, and how fast a colonisation front could cross the galaxy.
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Odds Ratio to Absolute Risk Calculator: RR, Risk Difference, NNH and Attributable Fraction
Free odds ratio to risk ratio calculator: enter a published OR or RR with its 95% confidence interval and a baseline risk, and get absolute risks per 1,000, the risk difference, number needed to harm or treat with Altman's interval, the population attributable fraction (Levin and Miettinen) and the E-value.
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
Explore by Category
Browse simulations organized by subject area
Astronomy
Stars, planets, galaxies
24 simulationsBiology
Cells, genetics, ecosystems
50 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.
46 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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