Electronics Engineering Platform

Build. Calculate. Engineer.

Free practical electronics engineering calculators for circuit design, components, RF, power electronics, batteries, signal analysis and electrical engineering.

OCTOPART
ENGINEERING
Engineering Platform

Tools for Modern Electronics

Explore calculators covering fundamental circuits, passive components, RF and signal analysis, batteries, electrical units and practical hardware engineering.

Circuit & Analog

Calculators for voltage, current, resistance, power, dividers, time constants and resonance.

Components

Practical calculators for resistors, capacitors and inductors used in everyday circuit design.

RF & Signal Analysis

Calculators for wavelength, frequency, antennas, dB, dBm and signal relationships.

Power Electronics

Tools for electrical power, batteries, stored energy and practical power-system calculations.

Frequency & Timing

Convert frequency and period and work with timing relationships used in digital and analog electronics.

Electrical Units

Convert common electrical engineering units and signal levels quickly without leaving the Octopart platform.

Electronics Calculators

Engineering Calculator Directory

Browse the available Octopart.org calculators. Each tool provides the relevant formula, inputs, worked examples and practical engineering notes.

Use these tools for quick engineering calculations during circuit design, component selection, prototyping, RF work, power-system analysis and electronics development.

Circuit Calculators

Fundamental voltage, current, resistance, power and circuit relationships.

Ohm's Law Calculator

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

Open Calculator

Voltage Divider Calculator

Calculate divider output voltage, current and resistor power.

Open Calculator

Current Divider Calculator

Calculate current distribution through parallel resistor branches.

Open Calculator

Power Dissipation Calculator

Calculate electrical power from voltage, current and resistance.

Open Calculator

RC / RL / RLC Time Constant

Calculate RC and RL time constants and related circuit timing values.

Open Calculator

Resonance Frequency Calculator

Calculate LC and RLC resonant frequency from inductance and capacitance.

Open Calculator

Resistor, Capacitor & Inductor Calculators

Component values, combinations, stored energy and electrical characteristics.

SMD Resistor Code Calculator

Decode 3-digit, 4-digit, R-marked and EIA-96 SMD resistor markings.

Open Calculator

Resistor Color Code Calculator

Decode resistor values from common color-band markings.

Open Calculator

Series Resistor Calculator

Calculate total resistance, circuit current, voltage drops and power for series resistors.

Open Calculator

Parallel Resistor Calculator

Calculate equivalent resistance for parallel resistor networks.

Open Calculator

Capacitor Reactance Calculator

Calculate capacitive reactance from frequency and capacitance.

Open Calculator

Inductor Reactance Calculator

Calculate inductive reactance from frequency and inductance.

Open Calculator

Series Capacitor Calculator

Calculate equivalent capacitance, charge and voltage distribution.

Open Calculator

Parallel Capacitor Calculator

Calculate total capacitance for parallel capacitor networks.

Open Calculator

Capacitor Energy Calculator

Calculate energy stored in a capacitor using E = ½CV².

Open Calculator

Inductor Energy Calculator

Calculate energy stored in an inductor using E = ½LI².

Open Calculator

RF, Signal & Frequency Calculators

Tools for frequency, wavelength, antennas, signal levels and RF engineering.

Frequency ↔ Wavelength

Convert frequency to wavelength and wavelength to frequency.

Open Calculator

Antenna Length Calculator

Estimate quarter-wave and other antenna lengths from operating frequency.

Open Calculator

dB Calculator

Calculate power, voltage and current ratios in decibels.

Open Calculator

Voltage ↔ dB Calculator

Convert voltage ratios to dB and dB values back to voltage ratios.

Open Calculator

dBm ↔ Watts Calculator

Convert RF power levels between dBm, watts, milliwatts and microwatts.

Open Calculator

Frequency ↔ Period

Convert frequency to period and period to frequency across common units.

Open Calculator

Power & Battery Calculators

Practical tools for electrical power, battery capacity and stored energy.

Power Dissipation

Calculate power using voltage, current or resistance.

Open Calculator

Battery Runtime Calculator

Estimate battery runtime from capacity, voltage, load and efficiency.

Open Calculator

Capacitor Energy

Calculate stored energy from capacitance and voltage.

Open Calculator

Inductor Energy

Calculate magnetic energy stored in an inductor from L and current.

Open Calculator

Electrical Unit Converters

Convert electrical engineering quantities and signal-related units.

Electrical Unit Converter

Convert common electrical units including voltage, current, resistance, capacitance, inductance, frequency and power.

Open Converter

Frequency ↔ Period

Convert Hz, kHz, MHz and GHz into corresponding time periods.

Open Converter

Frequency ↔ Wavelength

Convert between frequency and wavelength for RF, optical and acoustic applications.

Open Converter

dBm ↔ Watts

Convert absolute RF power levels between dBm and watts or milliwatts.

Open Converter
Octopart Development

Engineering Tool Roadmap

The calculator library will continue expanding into PCB engineering, embedded systems, power electronics, RF and hardware manufacturing.

1

Fundamental Electronics

Ohm's law, voltage and current dividers, resistance, power, capacitors, inductors, RC circuits and resonance.

2

Component Engineering

Resistor color codes, SMD markings, capacitor codes, component combinations, energy storage and practical component calculations.

3

RF & Signal Engineering

Wavelength, antennas, dB, dBm, attenuation, signal ratios, RF systems and transmission-line calculations.

4

PCB & Power Electronics

Trace width, via current, impedance, PCB stackups, converters, batteries, thermal calculations and power-system tools.

5

Embedded Systems & Manufacturing

Future tools can include UART, SPI, I²C, PWM, clocks, BOM analysis, PCB manufacturing, assembly and hardware production utilities.

An Electronics Toolbox for Engineers

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.

Latest Electronics News 2026 | Engineering, Tech & Hardware Updates

Latest Electronics News & Engineering Articles

Stay updated with the newest trends in electronics, hardware, and embedded systems.

EE Times News

Bringing Design Data Management into the Developer Workflow

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.

AI Hardware’s Hidden Cost: Between Orders and Output

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.

Five Things You Didn’t Know About Co-Packaged Optics 

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.

Marvell Snaps Photonics Chipmaker Lumentum to Bolster AI Connectivity

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.

Macronix Builds Hardware Security into NOR Flash Ahead of EU Cyber Resilience Act

The European Union's Cyber Resilience Act (CRA), which becomes mandatory in December 2027, is raising the bar for cybersecurity in connected devices. Rather than relying on software patches to address vulnerabilities after they emerge, manufacturers are under growing pressure to build security into products from the outset. For connected devices, that shift puts flash memory in a new role: alongside storing code and data, it must help protect device identity, data integrity and software updates.

The post Macronix Builds Hardware Security into NOR Flash Ahead of EU Cyber Resilience Act appeared first on EE Times.

Hackaday News

The Depiction Of Amateur Radio In The Movies And TV

A constant in film and TV if you work with technology is to continually see wildly inappropriate depictions of it on screen. Whether it’s all those hacking scenes in which …read more

The Components for Life May Not Have Arrived By Comet

When it comes to abiogenesis, i.e. the formation of the first biological cells on Earth, there are many theories on how this got kickstarted. One of the more popular theories …read more

NEMESIS Gives You Control Over Your Hyundai Head Unit

Whether it’s to make more money or because of licensing disagreements, car companies often restrict the abilities of the infotainment units in their vehicles. They can do so much more, …read more

Flying an RC Airplane with Twin Airblower EDFs

Shortly after [RCMakerLab] posted his question on potentially equipping an RC airplane with the electronic ducted fans (EDFs) from those airblower devices – are sold mostly as a replacement for …read more

Investigating whether Zener Diodes work for ESD Protection

Sometimes the naming of parts in electronics can contribute to confusion about what they are good for, with the topic of Zener diodes in the context of fast surges like …read more

Adafruit Blog News

LakeShark: the pocket-sized portable SDR scanner

Open Electronics covered LakeShark, a handheld SDR scanner and radio workbench built by SAMS0N1TE. Software defined radio (SDR) has the tuning and decoding happening in code instead of fixed circuits. The build uses the LilyGO T-Display P4, with an ESP32-P4, a 4.1 inch AMOLED screen at 568 x 1232, 16 MB of flash, GPS, a […]

The Encyclopedia of Movie Cats

image via A24   Ever wonder about the cats of the big screen? Wonder no more with The Encyclopedia of Movie Cats from A24 featuring more than 1,000 kitties, via Colossal. We love all the pets. Cats have always found their way onto our screens. They act as pets, villains, and accomplices, travel on spaceships, […]

ICYMI Python on Microcontrollers Newsletter: Adafruit Metro P4 Hydra, Possible New Raspberry Pi Boards, JIT Gone and More!

If you missed this week’s Python on Microcontrollers Newsletter, here is the ICYMI (in case you missed it) version. To never miss another issue, subscribe now! – You’ll get a terrific newsletter each Monday (which is out before this post). 12,313 subscribers worldwide! The next newsletter goes out Monday morning and subscribing is the best way to keep […]

Ten of the most bizarre films and their posters

Jason Kottke, writing at kottke.org, points to a list from Eternal Family: ten of the most bizarre films, picked along with their posters. Kottke had linked to Eternal Family recently. He calls this list a good guide to the weirdest things in their catalog. See more at kottke.org.

Sweary plots, DOOM maps, postcards and more #ArtTuesday

Daniel Catt writes in his newsletter about a new generative system for plotted handwriting art, one that moves away from the rigid magazine style grids he has used before and toward something more organic. The system runs in five stages. “Foundation” splits the page into 3 to 24 rows and draws horizontal lines that attract […]

Electronics Weekly News

Meta Dominates The Smart Specs Market

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 to spin off semis

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.

Get the Gadget Master newsletter!

Ensure you receive the latest and greatest Gadget Master posts, hot and fresh, straight into your inbox!

The post Get the Gadget Master newsletter! appeared first on Electronics Weekly.

OpenUK’s Space Tech Radar report plots open technology in space

OpenUK has launched its first Space Tech Radar report, covering both Earth observation (EO) and space observation (SO), in terms of open technology projects. It is a non-profit organisation covering […]

The post OpenUK’s Space Tech Radar report plots open technology in space appeared first on Electronics Weekly.

Marvell buys Lumentum

Marvell is to buy photonics specialist Lumentum for $115 billion in what is being seen as a bet on the continuation of the datacentre build out. “AI infrastructure is undergoing […]

The post Marvell buys Lumentum appeared first on Electronics Weekly.

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