Engineering Simulators
Interactive tools for analysis, learning, and technical exploration. All simulators are free to use and require no account.
Unit Converters
Power Converter
Convert watts, kilowatts, horsepower, BTU/h, kcal/h, tons of refrigeration, dBm and more — all units at once.
Energy Converter
Convert energy between joules, kJ, kWh, calories, BTU, foot-pounds, electronvolts, ergs and more — all units at once.
Length Converter
Convert length between millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, nautical miles and light-years — all units at once.
Mass & Weight Converter
Convert mass between milligrams, grams, kilograms, tonnes, ounces, pounds, stones, US/UK tons and atomic mass units — all units at once.
Temperature Converter
Convert temperature between Celsius, Fahrenheit, Kelvin, Rankine and Réaumur — all scales at once, with absolute zero validation.
Volume Converter
Convert volume between liters, milliliters, cubic meters, cubic feet, US/UK gallons, cups, tablespoons and more — all units at once.
Data Storage Converter
Convert data storage between bits, bytes, KB, MB, GB, TB, PB and their binary equivalents (KiB, MiB, GiB, TiB, PiB) — all units at once.
Area Converter
Convert area between square meters, square feet, square miles, acres and hectares — all units at once.
Speed Converter
Convert speed between m/s, km/h, mph, knots, Mach and the speed of light — all units at once.
Pressure Converter
Convert pressure between pascals, bar, psi, atmospheres, mmHg, inHg and kgf/cm² — all units at once.
Force Converter
Convert force between newtons, dynes, kilogram-force, pound-force and poundals — all units at once.
Torque Converter
Convert torque between N·m, lbf·ft, lbf·in, kgf·m and dyn·cm — all units at once.
Flow Rate Converter
Convert flow rate between m³/s, L/min, US GPM and CFM — all units at once.
Fuel Consumption Converter
Convert fuel economy between mpg (US), mpg (UK), km/L and L/100km — all units at once.
Thermodynamics
T-s Diagram
Interactive Temperature-Entropy diagram for analyzing thermodynamic states and cycles.
Entropy T-s Diagram
Model isothermal, adiabatic, polytropic, isobaric and isochoric ideal-gas processes and visualize entropy generation on an interactive T-s diagram.
Rankine Cycle
Analyze steam power cycles, thermodynamic states, and efficiency with interpolations.
Brayton Cycle
Interactive simulation of ideal and real gas turbine cycles with state diagrams.
Combustion & Heat
Gaseous Combustion
Stoichiometric simulator for pure gaseous fuels and hydrocarbon mixtures.
Combustion Analysis
Calculate dilution and thermal efficiency using Siegert's formula and Orsat analysis.
Natural Draft & Chimneys
Calculate natural draft, friction head loss, and pressure balances in industrial chimneys.
Fuel Construction
Define the elemental composition of a solid fuel on a dry basis (C·H·O·N·S·Z) and observe how moisture transforms the calculation basis.
Mechanics & Structures
Mohr's Circle Calculator
Compute principal stresses, maximum shear stress, and stress at any rotated plane from a plane stress state — with an interactive Mohr's Circle diagram.
Static Beam
Analyze simply supported beams: shear force diagrams, bending moment diagrams, and support reactions.
Electrical Engineering
Kapp Diagram Calculator
Compute voltage regulation, secondary voltage drop, and phasor diagram for single-phase transformers using the infinite bus model.
Voltage Divider
Interactive resistive voltage divider: adjust values and visualize output voltage and current distribution.
DC Circuit Analyzer
Analyze series and parallel resistive DC networks: currents, voltages, power, and maximum power transfer — with guided Thevenin, Norton, node, and mesh analysis.