Angular Velocity
What angular velocity is, the formula ω = 2π·n/60, how to convert RPM to rad/s and how it relates to linear speed, with worked examples from motors, wheels and centrifuges.
ENGINEERING, WITHOUT THE HASSLE
Calculate. Understand.
Simulate.
Free tools that take you from a formula to an interactive visualization and, when you need it, to the complete circuit, mechanism or robot cell in our virtual labs.
6 Labscircuits, microcontrollers, PLC, mechanisms, robots and code
13+calculators in English, more on the way
107/107external validation scenarios for the simulator
Freeno sign-up
LABS
Learn by moving things
Six labs in your browser to watch theory in action.
CALCULATORS
The ones engineers use most
Each one updates as you type and explains the formula, typical values and the mistakes to avoid.
Calculator
Three-Phase Power
Calculate active power, apparent power and line current in balanced three-phase systems with P = √3 · V · I · cos φ. Worked examples at 208 V, 400 V and 480 V, quick table and common mistakes.
Use calculator →CalculatorPower Factor
Calculate the power factor from active and apparent power and get the reactive power. Power triangle, typical values and a worked example of power factor correction with capacitors.
Use calculator →CalculatorOhm’s Law
Ohm’s law calculator: find voltage from current and resistance with V = I × R. All three forms of the formula, power, typical values and worked examples.
Use calculator →CalculatorVoltage Divider
Calculate the output of a resistive voltage divider with Vout = Vin · R2 / (R1 + R2). Live visualization, design formulas, loading effect and a worked 12 V battery example.
Use calculator →Calculator555 Timer Astable
Calculate the frequency, period and duty cycle of an NE555 astable multivibrator from R1, R2 and C. Formulas, typical values table, worked example and free simulation.
Use calculator →CalculatorLED Resistor
Calculate the series resistor an LED needs with R = (Vs − Vf) / I. Values for red, green, blue and white LEDs at 5 V and 12 V, LEDs in series, resistor power and common mistakes.
Use calculator →LEARNING CENTER
Don’t just get a number: understand what it means.
Voltage Divider
How a voltage divider works: where Vout = Vin·R2/(R1+R2) comes from, the Thévenin view of loading, potentiometers, reading thermistors with an ADC, and when not to use a divider.
VALIDATION
The simulator is tested, not just demoed.
Engineering Lab runs automated tests of its components, netlist parser, interface, solver and external reference scenarios. We publish the methodology and its limits so you know what each result means.
Methodology and scope →TOTAL ENGINEERING
A toolbox that grows with every problem.
The project is built for students, technicians, teachers and engineers. The tools are educational and support preliminary design; critical results must be verified against standards, datasheets, measurements and professional tools. The site started in Spanish and is being translated into English page by page, with real translations rather than machine output.