# MechSimulator

> Free online mechanical engineering simulators and trainers for technical and vocational education (TVET). 118 browser-based tools, no signup required.

MechSimulator is a static website offering 118 interactive engineering simulators across 11 categories. Every tool includes four learning modes: Simulate, Explore, Practice, and Quiz. Built for diploma, apprenticeship, and polytechnic-level engineering students. Created by Naseel Ibnu Azeez, an independent mechanical engineering educator.

## Categories

- [Measuring Instruments](https://mechsimulator.com/measuring/): 8 tools — vernier caliper, screw gauge, steel ruler, protractor, bevel protractor, pressure gauge, height gauge, dial gauge
- [Mechanics & Motion](https://mechsimulator.com/mechanics/): 12 tools — Newton's laws, projectile motion, friction, free fall, simple machines, Hooke's law, SHM, vibrations, gyroscope, torque & rotation, free body diagram, simple pendulum
- [Mechanisms & Machines](https://mechsimulator.com/mechanisms/): 12 tools — four-bar linkage, slider-crank, cam-follower, gear trains, centrifugal governor, governor dynamics, flywheel energy, flywheel dynamics, bearing selection, belt & chain drive, Geneva mechanism, Scotch yoke
- [Strength of Materials](https://mechsimulator.com/strength/): 15 tools — stress-strain, Mohr's circle, beam bending, truss analysis, bolted joint, riveted joints, spring design, shaft torsion, pressure vessel, moment of inertia, column buckling, UTM testing, impact testing, fatigue testing, crack propagation
- [Thermal & Fluid Engineering](https://mechsimulator.com/thermal/): 21 tools — thermodynamics, heat transfer, fluid flow, Pascal's law, Bernoulli's principle, wind tunnel, refrigeration cycle, four-stroke engine, two-stroke engine, Boyle's law, Charles' law, specific heat capacity, ideal gas law, thermal expansion, buoyancy, continuity equation, phase change, psychrometric chart, Reynolds number, Stefan-Boltzmann, thermal conductivity
- [Electrical Engineering](https://mechsimulator.com/electrical/): 16 tools — Ohm's law, RC circuit, RLC circuit, transformer, Wheatstone bridge, DC motor, diode rectifier, capacitor bank, star-delta, Kirchhoff solver, AC generator, BJT transistor, resistor color code, logic gates, Karnaugh map, PLC ladder logic
- [Virtual Lab Testing](https://mechsimulator.com/testing/): 4 tools — centrifugal pump test rig, hydraulic turbine test rig, IC engine Morse test, torsion testing machine
- [Workshop & Manufacturing](https://mechsimulator.com/workshop/): 13 tools — drilling machine, lathe machine, milling machine, CNC G-code, welding symbols, thread nomenclature, GD&T trainer, tolerance & fits, hardness testing, hydraulic circuit, pneumatic circuit, electro-pneumatic circuit, litmus test
- [Engineering Calculators](https://mechsimulator.com/calculators/): 9 tools — power screw, weld strength, stress concentration, machining calculator, bearing life, gear strength, heat exchanger, fatigue life, hydraulic cylinder
- [Basic Science](https://mechsimulator.com/basic-science/): 4 tools — build your atom, chemical bonds, chemical mixing (acids & bases), ray optics
- [Mathematics](https://mechsimulator.com/maths/): 4 tools — area calculator, calculus visualizer, math graphing, matrix calculator

## All 118 Simulator URLs

### Measuring Instruments
- [Vernier Caliper Simulator](https://mechsimulator.com/tools/vernier-caliper/): Measure to 0.02 mm, 0.05 mm, or 0.1 mm precision
- [Screw Gauge (Micrometer)](https://mechsimulator.com/tools/screw-gauge/): Measure to 0.01 mm precision using thimble and barrel
- [Steel Ruler](https://mechsimulator.com/tools/steel-ruler/): Measure length 0–150 mm with 0.5 mm precision
- [Protractor](https://mechsimulator.com/tools/protractor/): Measure angles 0°–180° with a rotating arm
- [Bevel Protractor](https://mechsimulator.com/tools/bevel-protractor/): Measure angles with 5′ vernier least count
- [Pressure Gauge](https://mechsimulator.com/tools/pressure-gauge/): Read pressure 0–100 PSI with dual scale
- [Vernier Height Gauge](https://mechsimulator.com/tools/height-gauge/): Measure heights 0–120 mm with 0.02 mm precision
- [Dial Gauge](https://mechsimulator.com/tools/dial-gauge/): Read displacement 0–10.00 mm with 0.01 mm precision

### Mechanics & Motion
- [Newton's Laws of Motion](https://mechsimulator.com/tools/newtons-laws/): Inertia, F = ma, action-reaction with free body diagrams
- [Projectile Motion](https://mechsimulator.com/tools/projectile-motion/): Launch angle, velocity, trajectory under gravity
- [Friction & Contact Forces](https://mechsimulator.com/tools/friction/): Static & kinetic friction — flat, inclined, braking
- [Free Fall & Gravity](https://mechsimulator.com/tools/free-fall/): s = ½gt², velocity & distance graphs, compare planets
- [Simple Machines](https://mechsimulator.com/tools/simple-machines/): Lever, pulley, inclined plane, wheel & axle, screw, wedge
- [Hooke's Law](https://mechsimulator.com/tools/hookes-law/): F = kx, series & parallel spring systems
- [Simple Harmonic Motion](https://mechsimulator.com/tools/shm/): Spring-mass & pendulum SHM with energy graphs
- [Vibrations](https://mechsimulator.com/tools/vibrations/): Free, damped, forced & resonance modes
- [Gyroscope](https://mechsimulator.com/tools/gyroscope/): Precession, nutation, angular momentum
- [Torque & Rotation](https://mechsimulator.com/tools/torque-rotation/): τ = F×r, moment of inertia, rolling race
- [Free Body Diagram Maker](https://mechsimulator.com/tools/free-body-diagram/): Add force vectors at a point — resultant, ΣFx, ΣFy & equilibrium status
- [Simple Pendulum](https://mechsimulator.com/tools/simple-pendulum/): T = 2π√(L/g) — length, gravity, amplitude with live KE/PE energy

### Mechanisms & Machines
- [Four-Bar Linkage](https://mechsimulator.com/tools/four-bar-linkage/): Grashof criterion, transmission angle, coupler curves
- [Slider-Crank Mechanism](https://mechsimulator.com/tools/slider-crank/): All 4 inversions — IC engine, quick-return
- [Cam & Follower](https://mechsimulator.com/tools/cam-follower/): SHM, cycloidal, uniform velocity & acceleration profiles
- [Gear Train Calculator](https://mechsimulator.com/tools/gear-trains/): Simple, compound & worm drives with animated gears
- [Centrifugal Governor](https://mechsimulator.com/tools/centrifugal-governor/): Watt, Porter, Proell governors with controlling force
- [Governor Dynamics](https://mechsimulator.com/tools/governor/): Sensitivity, isochronism, hunting & stability analysis
- [Flywheel Energy Storage](https://mechsimulator.com/tools/flywheel-energy/): Kinetic energy, moment of inertia, hoop stress
- [Flywheel Dynamics](https://mechsimulator.com/tools/flywheel/): Turning moment diagram, coefficient of fluctuation
- [Bearing Selection](https://mechsimulator.com/tools/bearing-selection/): L10 life, dynamic load rating, bearing types & nomenclature
- [Belt & Chain Drive](https://mechsimulator.com/tools/belt-drive/): Open/crossed belt & chain — velocity ratio, capstan equation
- [Geneva Mechanism](https://mechsimulator.com/tools/geneva-mechanism/): Intermittent motion — crank & wheel, locking arc, 3–8 slot configs
- [Scotch Yoke Mechanism](https://mechsimulator.com/tools/scotch-yoke/): 3 inversions — elliptical trammel, Scotch yoke & Oldham coupling

### Strength of Materials
- [Stress-Strain Diagram](https://mechsimulator.com/tools/stress-strain/): Interactive curve — Hooke's law, yield, UTS, fracture
- [Mohr's Circle](https://mechsimulator.com/tools/mohrs-circle/): Principal stresses, max shear, stress transformation
- [Beam Bending — SFD & BMD](https://mechsimulator.com/tools/beam-bending/): Shear force & bending moment diagrams for beams
- [Truss Analysis](https://mechsimulator.com/tools/truss-analysis/): Warren, Pratt, and Howe trusses — method of joints
- [Bolted Joint Design](https://mechsimulator.com/tools/bolted-joint/): Metric bolts M6–M24 — tensile, shear, bearing stress
- [Riveted Joints](https://mechsimulator.com/tools/riveted-joints/): Rivet head types & joint configurations
- [Spring Design Calculator](https://mechsimulator.com/tools/spring-design/): Helical spring stiffness, shear stress, Wahl factor
- [Shaft & Torsion](https://mechsimulator.com/tools/shaft-torsion/): Shear stress, angle of twist, polar MOI
- [Pressure Vessel](https://mechsimulator.com/tools/pressure-vessel/): Hoop & longitudinal stress in thin-walled vessels
- [Moment of Inertia](https://mechsimulator.com/tools/moment-of-inertia/): Section properties for 8 cross-sections — Ix, Iy, parallel axis theorem
- [Column Buckling](https://mechsimulator.com/tools/column-buckling/): Euler & Johnson critical load — 4 end conditions
- [UTM Virtual Lab](https://mechsimulator.com/tools/utm-testing/): Tensile & compression tests with real-time stress-strain curves
- [Impact Testing Lab](https://mechsimulator.com/tools/impact-testing/): Charpy & Izod pendulum — DBTT curves, fracture analysis
- [Fatigue Testing Lab](https://mechsimulator.com/tools/fatigue-testing/): R.R. Moore rotating beam — S-N curves, endurance limit
- [Crack Propagation](https://mechsimulator.com/tools/crack-propagation/): Stress intensity factor K, critical crack length, Paris-law fatigue growth

### Thermal & Fluid Engineering
- [Thermodynamics Cycles](https://mechsimulator.com/tools/thermodynamics/): Carnot, Otto, Diesel & Brayton with PV diagrams
- [Heat Transfer Modes](https://mechsimulator.com/tools/heat-transfer/): Conduction, convection, radiation with animated heat flow
- [Fluid Flow in Pipes](https://mechsimulator.com/tools/fluid-flow/): Laminar & turbulent — Reynolds number, pressure drop
- [Pascal's Law](https://mechsimulator.com/tools/pascals-law/): Hydraulic press — force multiplication & mechanical advantage
- [Bernoulli's Principle](https://mechsimulator.com/tools/bernoullis-principle/): Venturi effect, continuity equation, dynamic pressure
- [Wind Tunnel](https://mechsimulator.com/tools/wind-tunnel/): Drag, lift, streamlines — 6 test objects, Reynolds number
- [Refrigeration Cycle](https://mechsimulator.com/tools/refrigeration-cycle/): Vapor compression — P-h diagram, COP, 4 refrigerants
- [Four-Stroke Engine](https://mechsimulator.com/tools/four-stroke-engine/): Otto & Diesel — piston animation, PV diagram, valve timing
- [Two-Stroke Engine](https://mechsimulator.com/tools/two-stroke-engine/): Port timing & crankcase compression — scavenging, efficiency
- [Boyle's Law](https://mechsimulator.com/tools/boyles-law/): PV = constant — animated piston-cylinder with gas particles
- [Charles' Law](https://mechsimulator.com/tools/charles-law/): V/T = constant — isobaric expansion, absolute zero
- [Specific Heat Capacity](https://mechsimulator.com/tools/specific-heat-capacity/): Q = mcΔT — compare 6 materials, temperature graphs
- [Ideal Gas Law](https://mechsimulator.com/tools/ideal-gas-law/): PV = nRT — isothermal, isobaric & isochoric processes
- [Thermal Expansion](https://mechsimulator.com/tools/thermal-expansion/): Linear expansion, shrink fit design & bimetallic strip
- [Buoyancy & Archimedes](https://mechsimulator.com/tools/buoyancy/): Buoyant force, submerged fraction & apparent weight — 8 objects, 6 fluids
- [Continuity Equation](https://mechsimulator.com/tools/continuity-equation/): A₁V₁ = A₂V₂ — particles speed up through a pipe narrowing, flow rate Q
- [Phase Change & Latent Heat](https://mechsimulator.com/tools/phase-change/): Solid-liquid-gas transitions, Q = mL, animated heating curves
- [Psychrometric Chart](https://mechsimulator.com/tools/psychrometric-chart/): Dry/wet bulb, dew point, RH, humidity ratio & enthalpy — ASHRAE math, SI/IP
- [Reynolds Number](https://mechsimulator.com/tools/reynolds-number/): Laminar vs turbulent — eddies form as Re crosses 2300
- [Stefan-Boltzmann Law](https://mechsimulator.com/tools/stefan-boltzmann/): P = εσAT⁴ — a body glows red to white as temperature rises
- [Thermal Conductivity](https://mechsimulator.com/tools/thermal-conductivity/): Fourier's law — heat travel through a rod, conductors vs insulators

### Electrical Engineering
- [Ohm's Law & DC Circuits](https://mechsimulator.com/tools/ohms-law/): Series, parallel & mixed circuits with Kirchhoff's laws
- [RC Circuit](https://mechsimulator.com/tools/rc-circuit/): Time constant, charging/discharging curves, energy storage
- [RLC Circuit — AC Analysis](https://mechsimulator.com/tools/rlc-circuit/): Impedance, resonance, phasor diagrams, power factor
- [Transformer](https://mechsimulator.com/tools/transformer/): Turns ratio, voltage transformation, efficiency & losses
- [Wheatstone Bridge](https://mechsimulator.com/tools/wheatstone-bridge/): Balanced & unbalanced bridge, unknown resistance
- [DC Motor](https://mechsimulator.com/tools/dc-motor/): Speed-torque characteristics, back EMF, armature current
- [Diode & Rectifier Circuits](https://mechsimulator.com/tools/diode-rectifier/): Half-wave, full-wave & bridge rectifier with waveforms
- [Capacitor Bank Designer](https://mechsimulator.com/tools/capacitor-bank/): Series & parallel capacitor banks, power factor correction
- [Star-Delta Conversion](https://mechsimulator.com/tools/star-delta/): Y-Δ transformation, line vs phase values, 3-phase power
- [Kirchhoff's Circuit Solver](https://mechsimulator.com/tools/kirchhoff-solver/): KVL & KCL analysis, node voltages, mesh currents
- [AC Generator](https://mechsimulator.com/tools/ac-generator/): Rotating coil EMF, sinusoidal waveform, frequency
- [BJT Transistor](https://mechsimulator.com/tools/bjt-transistor/): NPN & PNP junctions — electron/hole flow, depletion regions, breakdown
- [Resistor Color Code](https://mechsimulator.com/tools/resistor-color-code/): 3, 4, 5 & 6-band — resistance, tolerance & temperature coefficient
- [Logic Gates](https://mechsimulator.com/tools/logic-gates/): AND, OR, NOT, flip-flops — truth tables & Boolean algebra, 22 components
- [Karnaugh Map Solver](https://mechsimulator.com/tools/karnaugh-map/): 2–5 variable K-maps — SOP/POS, prime implicants, grouping
- [PLC Ladder Logic](https://mechsimulator.com/tools/plc-ladder-logic/): IEC 61131-3 — contacts, coils, timers, counters & scan cycles

### Virtual Lab Testing
- [Centrifugal Pump Test Rig](https://mechsimulator.com/tools/centrifugal-pump/): Head-capacity, power & efficiency curves, BEP, affinity laws, NPSH
- [Hydraulic Turbine Test Rig](https://mechsimulator.com/tools/hydraulic-turbine/): Pelton, Francis & Kaplan — efficiency, power, torque, specific speed
- [IC Engine Morse Test](https://mechsimulator.com/tools/morse-test/): Indicated/friction power, mechanical & thermal efficiency, heat balance
- [Torsion Testing Machine](https://mechsimulator.com/tools/torsion-testing/): Twist solid & hollow shafts to fracture — torque-angle curves, 13 materials

### Workshop & Manufacturing
- [Drilling Machine](https://mechsimulator.com/tools/drilling-machine/): Parts identification, cutting speed, feed rate, MRR
- [Lathe Machine](https://mechsimulator.com/tools/lathe-machine/): Turning, facing, threading — cutting parameters
- [Milling Machine](https://mechsimulator.com/tools/milling-machine/): End mill, face mill, slot drill — speed, feed, MRR
- [CNC G-Code Simulator](https://mechsimulator.com/tools/cnc-gcode/): Write & visualize tool paths — G00, G01, G02, G03
- [Welding Symbol Trainer](https://mechsimulator.com/tools/welding-symbols/): AWS A2.4 — groove, fillet, plug, spot & seam
- [Thread Nomenclature](https://mechsimulator.com/tools/thread-nomenclature/): ISO 261 metric thread dimensions
- [GD&T Trainer](https://mechsimulator.com/tools/gdt-trainer/): All 14 ASME Y14.5 symbols — feature control frames
- [Tolerance & Fits](https://mechsimulator.com/tools/tolerance-fits/): ISO 286 limits & fits — clearance, transition & interference
- [Hardness Testing](https://mechsimulator.com/tools/hardness-testing/): Brinell, Rockwell & Vickers with animated indentation
- [Hydraulic Circuit Builder](https://mechsimulator.com/tools/hydraulic-circuit/): ISO 1219 drag-and-drop — 9 pre-built circuits
- [Pneumatic Circuit Builder](https://mechsimulator.com/tools/pneumatic-circuit/): ISO 1219 components — 39 parts, 9 pre-built circuits
- [Electro-Pneumatic Circuit](https://mechsimulator.com/tools/electro-pneumatic-circuit/): Dual-domain — 51 components, solenoid valves, relays
- [Litmus Paper Test Lab](https://mechsimulator.com/tools/litmus-test/): Test 15 chemicals with pH paper — colour changes, pH 1–14

### Engineering Calculators
- [Power Screw Calculator](https://mechsimulator.com/tools/power-screw/): Lead screw torque, efficiency & self-locking
- [Weld Strength Calculator](https://mechsimulator.com/tools/weld-strength/): Fillet & butt weld stress — throat area, FOS
- [Stress Concentration (Kt)](https://mechsimulator.com/tools/stress-concentration/): Kt factor for 8 geometries — color-mapped stress
- [Machining Calculator](https://mechsimulator.com/tools/machining-calculator/): RPM, feed rate, MRR, time & power for turning, milling, drilling
- [Bearing Life Simulator](https://mechsimulator.com/tools/bearing-life/): L10 life, dynamic load rating, reliability factors
- [Gear Strength (AGMA)](https://mechsimulator.com/tools/gear-strength/): Lewis bending & AGMA contact stress — spur & helical gears
- [Heat Exchanger](https://mechsimulator.com/tools/heat-exchanger/): LMTD & effectiveness-NTU — parallel & counter flow
- [Fatigue Life Simulator](https://mechsimulator.com/tools/fatigue-life/): S-N curve, Goodman/Soderberg diagrams, Miner's rule
- [Hydraulic Cylinder](https://mechsimulator.com/tools/hydraulic-cylinder/): Bore/rod sizing, extend/retract force & speed

### Basic Science
- [Build Your Atom](https://mechsimulator.com/tools/build-your-atom/): Drag protons, neutrons & electrons — live Bohr model for all 118 elements
- [Chemical Bonds](https://mechsimulator.com/tools/chemical-bonds/): Ionic & covalent — animated electron transfer & sharing, 37 elements
- [Chemical Mixing (Acids & Bases)](https://mechsimulator.com/tools/chemical-mixing/): Mix 14 acids & bases — neutralization, litmus & live pH
- [Ray Optics](https://mechsimulator.com/tools/ray-optics/): Trace light rays through mirrors & lenses — real & virtual images

### Mathematics
- [Area Calculator](https://mechsimulator.com/tools/area-calculator/): Animated areas for 18 shapes — circle, triangle, hexagon, sector, polygon
- [Calculus Visualizer](https://mechsimulator.com/tools/calculus-visualizer/): Animated tangent lines, Riemann-sum integrals & symbolic derivatives
- [Math Graphing Calculator](https://mechsimulator.com/tools/math-graphing/): Plot functions, roots, derivatives & integrals with annotation tools
- [Matrix Calculator](https://mechsimulator.com/tools/matrix-multiplication/): Animated multiply, add, subtract & Gauss-Jordan inverse up to 6×6

## About
- [About Page](https://mechsimulator.com/about/): Mission, creator profile, platform overview
- Contact: naseel@mechsimulator.com
- Created by Naseel Ibnu Azeez, Independent Mechanical Engineering Educator