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.
Ushio has been accepting orders for LED-based UX-4 wafer aligners since July 2026, offering mercury-free, high-throughput lithography.
The post Accepting Orders for the LED Light-Sourced Projection Aligners appeared first on EE Times.
As digital design workflows increasingly center on modern, text-based development environments, engineers expect the same efficiency from design data management as they do from coding tools. Visual Studio Code (VS Code) has become a preferred platform for developing RTL, HDL, scripts, and verification assets, offering a flexible and extensible workspace that streamlines day-to-day engineering tasks. […]
The post Bringing Design Data Management into the Developer Workflow appeared first on EE Times.
Alphabet’s TPU inventory, Intel’s manufacturing tradeoffs, and equipment suppliers’ balance sheets show how capital builds up along the path to usable AI computing capacity.
The post AI Hardware’s Hidden Cost: Between Orders and Output appeared first on EE Times.
CPO may be a photonics breakthrough, but commercial success hinges equally on advanced packaging that integrates, connects and protects components at scale.
The post Five Things You Didn’t Know About Co-Packaged Optics appeared first on EE Times.
The $115 billion deal aims to create a category leader in AI connectivity by co-designing network processors and lasers for optical transceivers.
The post Marvell Snaps Photonics Chipmaker Lumentum to Bolster AI Connectivity appeared first on EE Times.
The UK Space Agency is inviting proposals for space-based projects that will help strengthen international partnerships for the UK space sector. Funding will be through the government’s International Bilateral Fund […]
The post UK Space Agency invites proposals for international space partnerships appeared first on Electronics Weekly.
Sony has announced its IMX742, a CMOS image sensor for single-use endoscopes. The company highlights it as the industry’s first to support digital output and data transmission through a 5m […]
The post Sony IMX742 1mm square image sensor serves single-use endoscopes appeared first on Electronics Weekly.
Meta’s new Audio AI glasses started selling yesterday after the company’s Gen 3 smart glasses hit markets about three weeks ago. Most notably, the new audio-only model features the usual […]
The post Meta Dominates The Smart Specs Market appeared first on Electronics Weekly.
Bosch will spin off its semiconductor division in January 2028, it said today. The move comes as part of a strategy to run semis as a foundry business as well […]
The post Bosch to spin off semis appeared first on Electronics Weekly.
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