Free practical electronics engineering calculators for circuit design, components, RF, power electronics, batteries, signal analysis and electrical engineering.
Explore calculators covering fundamental circuits, passive components, RF and signal analysis, batteries, electrical units and practical hardware engineering.
Calculators for voltage, current, resistance, power, dividers, time constants and resonance.
Practical calculators for resistors, capacitors and inductors used in everyday circuit design.
Calculators for wavelength, frequency, antennas, dB, dBm and signal relationships.
Tools for electrical power, batteries, stored energy and practical power-system calculations.
Convert frequency and period and work with timing relationships used in digital and analog electronics.
Convert common electrical engineering units and signal levels quickly without leaving the Octopart platform.
Browse the available Octopart.org calculators. Each tool provides the relevant formula, inputs, worked examples and practical engineering notes.
Fundamental voltage, current, resistance, power and circuit relationships.
Calculate voltage, current, resistance and power using Ohm's law.
Open CalculatorCalculate divider output voltage, current and resistor power.
Open CalculatorCalculate current distribution through parallel resistor branches.
Open CalculatorCalculate electrical power from voltage, current and resistance.
Open CalculatorCalculate RC and RL time constants and related circuit timing values.
Open CalculatorCalculate LC and RLC resonant frequency from inductance and capacitance.
Open CalculatorComponent values, combinations, stored energy and electrical characteristics.
Decode 3-digit, 4-digit, R-marked and EIA-96 SMD resistor markings.
Open CalculatorDecode resistor values from common color-band markings.
Open CalculatorCalculate total resistance, circuit current, voltage drops and power for series resistors.
Open CalculatorCalculate equivalent resistance for parallel resistor networks.
Open CalculatorCalculate capacitive reactance from frequency and capacitance.
Open CalculatorCalculate inductive reactance from frequency and inductance.
Open CalculatorCalculate equivalent capacitance, charge and voltage distribution.
Open CalculatorCalculate total capacitance for parallel capacitor networks.
Open CalculatorTools for frequency, wavelength, antennas, signal levels and RF engineering.
Estimate quarter-wave and other antenna lengths from operating frequency.
Open CalculatorConvert voltage ratios to dB and dB values back to voltage ratios.
Open CalculatorConvert RF power levels between dBm, watts, milliwatts and microwatts.
Open CalculatorConvert frequency to period and period to frequency across common units.
Open CalculatorPractical tools for electrical power, battery capacity and stored energy.
Estimate battery runtime from capacity, voltage, load and efficiency.
Open CalculatorConvert electrical engineering quantities and signal-related units.
Convert common electrical units including voltage, current, resistance, capacitance, inductance, frequency and power.
Open ConverterConvert between frequency and wavelength for RF, optical and acoustic applications.
Open ConverterThe calculator library will continue expanding into PCB engineering, embedded systems, power electronics, RF and hardware manufacturing.
Ohm's law, voltage and current dividers, resistance, power, capacitors, inductors, RC circuits and resonance.
Resistor color codes, SMD markings, capacitor codes, component combinations, energy storage and practical component calculations.
Wavelength, antennas, dB, dBm, attenuation, signal ratios, RF systems and transmission-line calculations.
Trace width, via current, impedance, PCB stackups, converters, batteries, thermal calculations and power-system tools.
Future tools can include UART, SPI, I²C, PWM, clocks, BOM analysis, PCB manufacturing, assembly and hardware production utilities.
Octopart.org brings practical electronics calculations and engineering utilities into one accessible platform. The calculator library covers circuit design, passive components, RF and signal analysis, power electronics, batteries and electrical unit conversion.
New engineering tools can be added progressively, with an emphasis on clear formulas, useful examples, responsive interfaces and practical engineering notes.
Stay updated with the newest trends in electronics, hardware, and embedded systems.
CASPA’s annual conference celebrates its 35th anniversary with a lineup of more than 35 CEOs from Silicon Valley, including Intel’s Lip-Bu Tan and Cerebras’s Andrew Feldman.
The post CASPA CEO Summit Preview with President Jimmy Cheng appeared first on EE Times.
Honya Europe's Robert Tarantowicz shares 17 years of lessons on PCB sourcing in China, quality, trust, and risk management.
The post 17 Years with China: What Really Makes a Partnership Work appeared first on EE Times.
Low-volume production sits between research and mass manufacturing. Europe needs an industrial model to fill the gap.
The post Europe’s Advanced Packaging Gap: Fraunhofer, Swissbit Target the Missing Middle appeared first on EE Times.
Applied Materials’ $5 billion EPIC Center brings chipmakers, equipment suppliers, and researchers together to accelerate semiconductor R&D and commercialization.
The post Applied Materials Bets $5B on a New Model for Chip Innovation appeared first on EE Times.
Join this webinar and learn how to add LCD graphics to MCU projects without a display controller, accelerator, or external DRAM.
The post Embedded Graphics on an MCU – Without an Accelerator appeared first on EE Times.
As more and more people lean on chatbots for comfort and guidance, experts have raised alarms over the potential pitfalls: erosion of social skills, unhealthy attachment to digital companions offering […]
The post How Can Users Who Seek Mental Health Support From AI Be Protected? appeared first on Electronics Weekly.
Adding cybersecurity to a car alongside existing protection against technical failures may disrupt critical reaction times for preventing an accident. Engineers can balance this through combined risk analysis, writes Diego […]
The post Linking functional safety with cybersecurity in the automotive industry appeared first on Electronics Weekly.
Knowles is introducing its ATT A-Series of wideband, surface mount attenuators, broadening its high-performance RF component portfolio. The company highlights the series’ attenuation accuracy and high power handling in a compact […]
The post Knowles ATT A-Series of attenuators in compact SMT package appeared first on Electronics Weekly.
Fortastra, a space defence company, has raised $30 million of Series A funding. It aims to establish persistent, multi-orbit security coverage through mass deployment of its security craft. The round […]
The post Fortastra raises $30m for manoeuvrable spacecraft for in-orbit security appeared first on Electronics Weekly.
Swedish PCB test company Wireflow has partnered with the UK’s Pickering Interfaces to create Testblox AB, offering automated test that does not need reconfiguration and which is easy to replicate, […]
The post Miniature modules open up in-fixture functional testing appeared first on Electronics Weekly.