Mechanical · Simulation
Fatigue Life Estimator
Estimate cycles to failure using Basquin S-N law with Goodman mean-stress correction. Applies M…
All Engineering Calculators
188 tools across 19 disciplines — free, transparent formulas, no sign-up.
By course:AP / IB PhysicsIntro ChemistryStatics & Mechanics of MaterialsCircuits IFluid MechanicsThermodynamics & Heat TransferSignals & Control SystemsStatistics & Data Analysis
Electrical · Simulation
Op-Amp Active Filter Designer
Design Butterworth or Chebyshev active low-pass, high-pass or band-pass filters. Returns Bode p…
Electrical · Simulation
Transmission Line Analyser
Lossless transmission line analysis: reflection coefficient, VSWR, input impedance, return loss…
Electrical · Simulation
AC Power Flow (Newton-Raphson)
Newton-Raphson AC power flow for small bus systems (up to 10 buses). Computes bus voltage magni…
Electrical · Simulation
Symmetrical Components
Decomposes unbalanced 3-phase voltages and currents into zero, positive and negative sequence c…
Structural · Simulation
FEM Beam Solver
Euler-Bernoulli finite element beam analysis with UDL, point loads and moments. Outputs deflect…
Structural · Simulation
Beam Natural Frequencies
Euler-Bernoulli FEM eigenvalue solver for beam vibration. Computes first N natural frequencies …
Structural · Simulation
2D Truss Solver
Direct stiffness method solver for 2D pin-jointed trusses. Enter node coordinates, member conne…
Structural
Pile Capacity (EC7 / AASHTO)
Calculate driven or bored pile ultimate and allowable capacity from tip bearing and shaft frict…
Chemical · Simulation
McCabe-Thiele Distillation
Binary distillation design using the McCabe-Thiele graphical method with constant relative vola…
Chemical · Simulation
CSTR / PFR Reactor Design
Compare CSTR and PFR reactor volumes for 1st or 2nd order irreversible reactions. Generates Lev…
Chemical
Flash Drum / VLE (Rachford-Rice)
Calculate vapour fraction, liquid and vapour phase compositions for a two- or three-component f…
Civil · Simulation
Seismic Response Spectrum
Computes elastic acceleration response spectra Sa(T) for multiple damping ratios using Newmark-…
Math · Simulation
Monte Carlo Risk Simulator
Monte Carlo simulation with up to 10 input variables using normal, uniform, triangular or logno…
Math · Simulation
Numerical ODE Solver
Solves any system of ODEs numerically using RK45, DOP853, BDF or Radau (for stiff systems). Ent…
Math · Simulation
Bootstrap Regression with CI
Fits linear, polynomial, power or exponential regression to data with bootstrap confidence inte…
Electrical
Short Circuit Current (IEC 60909)
Calculate 3-phase and single-phase short circuit currents, peak fault current and fault MVA per…
Electrical
SMPS Buck / Boost Design
Design a buck or boost SMPS converter: calculate duty cycle, minimum inductance, output capacit…
Environmental
Gaussian Plume Dispersion
Calculate air pollutant concentration at any receptor point using the Gaussian plume dispersion…
Environmental
Theis Groundwater Drawdown
Calculate groundwater drawdown at any radius and time using the Theis equation. Returns well fu…
Biomedical · Simulation
Pharmacokinetics (1-Compartment)
1-compartment pharmacokinetic model for IV bolus and oral dosing. Computes plasma concentration…
Biomedical · Simulation
HP Protein Folding (Lattice Model)
2D HP lattice model for protein folding. Enter an HP sequence (H=hydrophobic, P=polar), run ran…
Control Systems · Simulation
Control System Analyser
Analyse any LTI transfer function: unit step response, Bode gain and phase plots, pole-zero map…
Control Systems · Simulation
PID Controller Tuner
Tune P, PI or PID controllers for first-order-plus-dead-time plants using Ziegler-Nichols, Cohe…
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