Engineering Calculators
Welcome to our collection of free online engineering calculators. Quickly solve design challenges in electronics, PCB layout, and more.
Electronics
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PCB Trace Width Calculator
Calculate the optimal trace width for PCB design based on IPC-2221 standard. Supports copper thickness and temperature rise factors. -
Voltage Divider Calculator
The voltage divider is one of the most basic circuits in electronics, allowing you to reduce voltage to a desired level. -
Wire Gauge (AWG) Current Rating Calculator
This calculator estimates the safe current-carrying capacity of a wire, helping to prevent overheating and electrical hazards in your circuits. -
STM32 Timer Configuration Calculator (Prescaler & ARR)
Quickly calculate STM32 timer prescaler and auto-reload (ARR) values for your desired output frequency. Simple and accurate tool for embedded developers. -
Debounce Time Calculator for Switches (RC & Software)
Calculate RC components or software delays to debounce mechanical switches. Prevent signal noise and ensure clean digital inputs in your circuits. -
LED Resistor Calculator - Find the Right Resistor Value for LEDs
Calculate the correct resistor value for your LEDs. -
PCB Coil Generator
Generate a simple pcb coil track SVG path that can be reused in your faourite CAD software. -
Battery Life Calculator
Estimate battery life for your electronic circuits based on capacity, load, and efficiency. -
Ohm's Law Calculator
Calculate voltage (V), current (I), resistance (R), and power (P) easily using Ohm's Law. -
555 Timer Astable Mode Calculator
By selecting appropriate resistor and capacitor values, you can control the frequency, period, and duty cycle of the output waveform. -
Transistor Base Resistor Calculator
Quickly calculate the base resistor value for switching a BJT transistor. -
MOSFET Gate Resistor Calculator
Calculate the recommended gate resistor (Rg) to balance switching speed and protect your microcontroller from excessive charging currents when driving a MOSFET. -
Op-Amp Gain Calculator
Calculate the voltage gain of an inverting or non-inverting operational amplifier configuration based on the resistor values. -
STM32 PWM Calculator
Easily calculate the STM32 PWM timer Prescaler (PSC), Auto-Reload Register (ARR), and Compare Register (CCR) values for your desired PWM frequency and duty cycle. -
Voltage Drop Calculator for AWG
Estimate voltage drop in electrical wires based on wire gauge, run length, and load current. -
STM32 Crystal Load Capacitance Calculator
Calculate the ideal load capacitors for a crystal oscillator circuit on STM32 microcontrollers. -
Diode Equation Calculator (Shockley Equation)
Calculate diode current using the Shockley diode equation based on applied voltage, thermal voltage, and saturation current. -
Diode Junction Temperature Rise Calculator
Estimate the temperature rise of a diode's junction based on forward voltage, current, ambient temperature, and thermal resistance. -
Capacitor Charge & Discharge Calculator
Calculate the voltage of a capacitor during charging or discharging over time in an RC circuit. -
STM32 UART Baud Rate Calculator
Calculate UART baud rate settings for STM32 microcontrollers based on clock and register values. - Zener Diode Voltage Regulator Calculator Calculate output voltage using a Zener diode in regulator circuits
- LC Resonant Frequency Calculator Find the resonant frequency of an LC tank circuit using L and C
- Resistor Power Dissipation Calculator Calculate power in a resistor using voltage, current, or resistance
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Inductor Reactance Calculator
Calculate the inductive reactance (XL) of an inductor using inductance and frequency. -
ADC Voltage to Digital Value Calculator
Convert analog voltage to a digital ADC code using resolution and reference voltage. -
Low-Pass / High-Pass Filter Cutoff Frequency Calculator
Calculate the cutoff frequency for RC low-pass and high-pass filters based on resistance and capacitance.
Mechatronics
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Stepper Motor Full Turn Calculator
Calculate how many steps your stepper motor requires to complete a full 360° rotation, based on the motor's step angle and the microstepping factor used by your driver. -
Rotational to Linear Speed Converter
Convert rotational speed (RPM or rad/s) to linear speed (m/s) for shafts, wheels, or pulleys. -
Linear to Rotational Speed Calculator
Convert linear speed (m/s) into rotational speed (RPM or rad/s) for wheels, shafts, or pulleys in mechatronic systems. -
Gear Ratio Calculator
Calculate gear ratios, output speeds, and torque for mechanical gear systems.
Neural Networks
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Softmax Function Calculator
Calculate the softmax probabilities from input values, with adjustable temperature scaling, normalization, and precision. -
Conv2D Output Size Calculator
Calculate the output dimensions of a 2D convolutional layer based on input size, kernel, padding, stride, and dilation. -
Cross-Entropy Loss Calculator
Calculate cross-entropy loss between true labels and predicted probabilities for classification tasks, with selectable log base. -
Learning Rate Decay Schedule Calculator
Calculate the learning rate at each training step or epoch using various decay strategies like exponential, step, polynomial, cosine, and more. -
Conv2D FLOP & MAC Estimator
Estimate the number of floating point operations (FLOPs) and multiply-accumulate operations (MACs) for Conv2D layers in CNNs. -
Activation Function Visualizer
Visualize and compare popular neural network activation functions and their derivatives across input ranges.
Calculus
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Derivative Calculator
Symbolically compute the derivative of mathematical expressions with respect to a given variable. -
Symbolic Function Plotter
Graph any mathematical function from a symbolic expression over a chosen variable range.
Mechnaics
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Free Fall with Air Resistance Calculator
Compute velocity and displacement of an object falling under gravity with linear air resistance. -
Torque Calculator (with Lever Arm)
Calculate torque based on applied force and perpendicular lever arm distance. -
Centripetal Force Calculator
Calculate the force required to keep an object in circular motion using mass, velocity, and radius. -
Pendulum Period Calculator
Compute the time it takes for a simple pendulum to complete one full swing using length and gravity. -
Projectile Motion Calculator
Compute range, height, and flight time for an object launched at an angle with an initial velocity. -
Hooke's Law (Spring Force) Calculator
Calculate the restoring force of a spring using the spring constant and displacement from equilibrium.
Optics
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Wave Speed Calculator
Calculate wave velocity using frequency and wavelength. Useful for sound, light, or water wave analysis. -
Wavelength Calculator (from Speed and Frequency)
Calculate the wavelength of a wave using its speed and frequency. -
Doppler Effect Calculator
Calculate the observed frequency when the source or observer is moving using the classical Doppler Effect equation. -
Mach Number Calculator
Calculate the Mach number by comparing an object's speed to the speed of sound in its medium.
Fluid Dynamics
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Reynolds Number Calculator
Calculate the Reynolds number to determine fluid flow regime based on velocity, density, viscosity, and length. -
Bernoulli's Equation Calculator
Relate fluid pressure, velocity, and height between two points in steady, incompressible flow using Bernoulli’s principle.
Health & Fitness
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BMI Calculator
Calculate your Body Mass Index using height and weight. -
Body Fat Percentage Calculator
Estimate body fat using height, waist, neck (and hip for females) -
VO2 Max Calculator
Estimate cardiovascular fitness using the Rockport Walk Test
Disclaimer: These calculators are provided for informational purposes only. Always verify your designs against relevant engineering standards and consult a qualified professional. We do not take responsibility for any errors or damages resulting from the use of these calculations.