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
Most popular simulations
Solar System Simulator
Free 3D solar system simulator with accurate orbital mechanics. Zoom into planets, track real orbital periods, and compare sizes and distances. Includes all 8 planets, dwarf planets, and moons. Perfect for astronomy students. Try it free!
View Simulation
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!
View Simulation
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.
View Simulation
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!
View Simulation
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.
View Simulation
PLC Ladder Logic Simulator: Free Interactive Ladder Diagram Builder
Build and simulate PLC ladder logic diagrams with animated power flow, timers, counters, and I/O visualization. Free online tool for learning industrial automation programming.
View SimulationNewest Simulations
Recently published simulations fresh from our lab
Compound Gear Ratio Calculator - Gear Train Speed, Torque & Lewis Stress
Free compound gear ratio calculator for up to 4 stages. Calculate output RPM, torque and efficiency for spur, helical, bevel and worm trains, with preliminary Lewis stress for supported spur/helical teeth and schematic animation.
View Simulation
Meiosis and Genetic Variation Lab: Interactive Crossing Over & Gamete Visualizer
Free meiosis crossing over simulation: trace linked alleles, visualize gamete outcomes and independent assortment, and model meiosis I nondisjunction. Compare meiosis with mitosis.
View Simulation
Hypothesis Testing Decision Lab
Free interactive hypothesis testing simulator. Visualize p-values, significance levels (alpha), Type I and Type II errors, statistical power for a one-sample z-test. Explore normal distributions, error tradeoffs, power curves, and practice decisions.
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
21 simulationsBiology
Cells, genetics, ecosystems
44 simulationsChemistry
Reactions, molecules, elements
29 simulationsComputer Science
Algorithms, data structures
82 simulationsEarth Science
Geology, weather, climate
30 simulationsEngineering
Structures, circuits, systems
481 simulationsFinance & Economics
Financial concepts, investment strategies, and economic principles.
48 simulationsHealth
Body systems, disease prevention, and wellness.
43 simulationsMathematics
Algebra, geometry, calculus
44 simulationsPhysics
Mechanics, waves, thermodynamics
98 simulationsSocial Sciences
Policy models, social dynamics, and decision-making.
26 simulationsReady to Get Started?
Join thousands of engineers, students, and researchers using our interactive simulations and professional tools. Free to use — no downloads, no installations.
Create Free Account