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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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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Nuclear Reactor Power Plant Simulator
Interactive nuclear reactor power plant simulator covering 8 reactor types: PWR, BWR, CANDU, SMR, micro reactors, thorium MSR, sodium-cooled fast breeders, and Gen IV HTGR. An advanced-engineering-tool for nuclear power analysis with real-time neutronics, thermal-hydraulics, decay heat modeling, LCOE economics, and animated reactor schematics.
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Mendelian Genetics Breeding Simulator
Explore Mendelian genetics with our free interactive breeding simulation. Adjust traits and generations to visualize inheritance patterns. Perfect for biology students. Try it now!
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Photosynthesis Lab Simulator
Free photosynthesis rate simulator. Adjust light intensity, CO2 concentration, and temperature to measure oxygen production rate. Identify limiting factors and optimal growing conditions. Perfect for biology and botany students. Try it free!
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Fixed-Wing UAV Design & Performance Lab: Size, Fly and Trade a Long-Range Civilian Drone
Design a long-range civilian fixed-wing drone from the wing up. A component drag build-up, weight-sizing loop, propulsion lapse and Breguet, electric and step-integrated missions update live, alongside the V–n gust envelope, flight envelope, constraint diagram, wind-distorted range map, solar day/night balance, sensitivity tornado and an optimiser. Presets cover survey mapping, maritime search and rescue, medical delivery, atmospheric research, crop scouting and solar HAPS.
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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