Visualize mechanics, waves, thermodynamics, and more with real-time interactive simulations. Experiment freely — no lab equipment required.
Choose a category to dive into interactive experiments
Build and analyze electrical circuits with batteries, resistors, LEDs, switches, and measurement instruments in real time.
Launch objects at various angles and velocities. Observe parabolic trajectories affected by gravity.
Study oscillatory motion, period, and energy conservation in a swinging pendulum system.
Explore Hooke's law, simple harmonic motion, and damped oscillations with spring dynamics.
Investigate elastic and inelastic collisions. Visualize momentum and energy transfer between objects.
Visualize constructive and destructive interference of transverse waves in real time.
Observe diffraction patterns as light passes through two slits, revealing wave-particle duality.
Trace light rays through convex and concave lenses. Understand focal points, magnification, and image formation.
Simulate conduction, convection, and radiation. Watch thermal energy flow between objects.
Manipulate pressure, volume, and temperature to explore the kinetic molecular theory of gases.
Place charges and visualize electric field lines, equipotential surfaces, and Coulomb interactions.
Explore magnetic field patterns around wires and solenoids. See how charges move in magnetic fields.
Simulate gravitational orbits, escape velocity, and multi-body gravitational interactions.
Each simulation is powered by real physics equations computed in real time
Equations are solved numerically each frame using methods like Euler and Runge-Kutta integration for accurate results.
Adjust parameters like mass, velocity, friction, and more with sliders and inputs to see instant visual feedback.
Track position, velocity, energy, and other quantities over time with dynamically updating charts.
See the governing equations and watch how changing variables affects the mathematical relationships.
Test your understanding with built-in challenges that ask you to predict outcomes before running simulations.
Save your experiment configurations and share them with classmates or teachers via a simple link.
PhysicsLab is a free, open-source collection of interactive physics simulations built for students, educators, and curious minds. Every simulation runs entirely in your browser — no downloads, no plugins, no accounts required.
From classical mechanics to modern physics, each simulation lets you experiment with real physical laws and develop intuition through hands-on exploration.