NicheCalcs

Engineering Calculators

Welcome to our collection of free online engineering calculators. Quickly solve design challenges in electronics, PCB layout, and more.

Electronics

• 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 (R_g) 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
• 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.
• Power Supply Wattage Calculator
  Determine the wattage requirement of a power supply using voltage and current values.

Mechatronics

• 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

• 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

• 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

• 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

• 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

• 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.

Thermodynamics

• Heat Transfer Calculator (Q = m·c·ΔT)
  Compute heat energy transfer based on mass, specific heat capacity, and temperature change.
• Ideal Gas Law Calculator
  Compute pressure, volume, temperature, or moles of an ideal gas using PV = nRT.

Health & Fitness

• 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.