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Electronics Calculators Hub

Precise online tools for engineers, students, and hobbyists. Simplify your design process with instant calculations for circuits, filters, and components.

Stop doing manual math or fighting excel sheets. From basic Ohm's Law to complex Impedance analysis, select the right tool below and get results immediately.

What you will cover

  • Circuit Analysis: Ohm's Law, Voltage Dividers, RC Time Constants
  • Passive Components: Resistor Color Codes, Capacitor & Inductor Impedance
  • Filter Design: Low Pass Filters, Bode Plot visualization
  • Active Circuits: Op-Amp configurations, 555 Timers, Voltage Regulators

Basic Circuits

Ohm's Law diagram
Ohm's Law Calculator

Calculate voltage, current, resistance, and power using Ohm's law.

Voltage divider circuit diagram
Voltage Divider Calculator

Compute the output voltage of a resistor voltage divider.

Decibel conversion chart
Decibels & Unit Converter

Convert between dB, power ratios, and voltage ratios with ease.

Resistor combination diagram
Parallel & Series Resistors Calculator

Calculate equivalent resistance for series and parallel resistor networks.

LED circuit diagram
LED Calculator

Determine the correct resistor value for safely powering an LED.

Resistor color code chart
Resistor Color Code Calculator

Calculate the resistance value of a resistor based on its color code.

Timer 555 circuit diagram
Timer 555 Calculator

Calculate times, duty cycle, and frequency for 555 timer circuits.

Filters & Impedance

Capacitor impedance frequency plot
Capacitor Impedance Graph Calculator

Plot capacitor impedance versus frequency on a logarithmic scale.

Low-pass filter graph
Low-Pass Filter Calculator

Design RC low-pass filters and visualize their frequency response.

Capacitor symbol
Capacitor Impedance Calculator

Calculate the impedance of a capacitor at a given frequency.

Inductor symbol
Inductor Impedance Calculator

Calculate the impedance of an inductor at a given frequency.

RC circuit diagram
RC Circuit Time Constant Calculator

Find the charging and discharging time constant of RC circuits.

Op-Amps

Non-inverting op-amp circuit
Non-Inverting Op-Amp Calculator

Compute gain and resistor values for non-inverting op-amp circuits.

Inverting op-amp circuit
Inverting Op-Amp Calculator

Calculate gain and resistor ratios for inverting op-amp configurations.

Regulators & Control

LM317/LM1117 regulator schematic
LM317/LM1117 Voltage Regulator Calculator

Design adjustable voltage regulators with the LM317/LM1117 IC.

Loop compensation block diagram
Control loop Compensator Calculator

Analyze and design loop compensators for control systems.

PCB Layout

PCB Trace Width Calculator
IPC-2221 PCB Trace Width Calculator

Calculate required PCB trace width, voltage drop, and power loss using IPC-2221 standard.