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

AI to the Edge: Generative Intelligence for Robotics and Autonomous Systems

Designed for embedded engineers, robotics developers, AI practitioners, and technical leaders, this webinar explores how generative intelligence is helping shape the future of physical AI.

The post AI to the Edge: Generative Intelligence for Robotics and Autonomous Systems appeared first on EE Times.

Sir Arthur C. Clarke Deserves a Nobel Prize

Ever since the Silicon Catalyst 2023 Semiconductor Industry Forum (“Welcome to our AI Wonderland”), I’ve been convinced that the Nobel Prize committee needs to consider a posthumous award for Sir Arthur. As a reminder, Sir Arthur’s movie “2001: A Space Odyssey” was released in 1968. At that time, the smallest commercially available transistor geometry was […]

The post Sir Arthur C. Clarke Deserves a Nobel Prize appeared first on EE Times.

BIWIN to Show Storage Solutions for AI and the Edge at electronica 2026

Gear up for the AI era. From 122.88 TB enterprise SSDs to integrated embedded memory and Mini SSDs, BIWIN will showcase storage solutions built specifically for a new generation of electronic systems.  BIWIN, a leading provider of memory and storage solutions, will exhibit at electronica 2026, November 10-13 at Trade Fair Center Messe München in […]

The post BIWIN to Show Storage Solutions for AI and the Edge at electronica 2026 appeared first on EE Times.

The Power of Dual-Phase DrMOS Technology in AI Systems

Learn how MPS dual-phase DrMOS solution address power density, efficiency, and thermal management challenges in compact AI power systems.

The post The Power of Dual-Phase DrMOS Technology in AI Systems appeared first on EE Times.

Andes Waits For Market Momentum For Cuzco CPU

Andes CTO Charlie Su said the company put its high-end RISC-V CPU on the back burner for commercial reasons.

The post Andes Waits For Market Momentum For Cuzco CPU appeared first on EE Times.

Hackaday News

Ask Hackaday: What Puts This Photo In The Pink?

It’s an exciting time to be a camera hacker, because we are at a moment when even cheap camera hardware is starting to have high resolution sensors, and the awesome …read more

Solar Light Shows Why Replacing NiMH with Li-Ion is Dangerous

Recently [DiodeGoneWild] got his paws on a purportedly IP44-rated outdoor solar light with PIR motion sensor that also contains an 18650 Li-ion cell. Since it’s being sold in Czechia in …read more

Looking For A Cellular Modem?

Cellular modems come and go, and they can be tricky beasts to tame – yet, in every portable computer project I’ve worked with, “LTE modem” has been a top-three request …read more

Static Radio For The Chumby One

If you haven’t heard of Static Radio, it’s basically an online radio station made up of podcast content. [Brendan Fitzpatrick] decided to take an old 2009 Chumby One and turn …read more

A Hackable Analog Phone System

Do you have old landline phones laying around the house, with touchtone buttons or rotary dials? Perhaps you’d like to do something with them! [Scott Dylewski] has built hardware to …read more

Adafruit Blog News

The Python on Microcontrollers Newsletter: subscribe for free

The Python for Microcontrollers Newsletter is the place for the latest news involving Python on hardware (microcontrollers AND single board computers like Raspberry Pi). This ad-free, spam-free weekly email is filled with CircuitPython, MicroPython, and Python information that you may have missed, all in one place! You get a summary of all the software, events, projects, and the latest hardware worldwide once a week, no […]

Making a filament lamp | Eric Weinhoffer

Eric Weinhoffer built a desk lamp around flexible filament LEDs, the bendable strands that have largely replaced EL wire for this kind of thing. They are brighter, more flexible, and easier to drive, though still fragile enough that a few broke during repeated assembly and disassembly. The circuit runs a 3.7 V LiPo into a […]

Thermoformed Christmas baubles #3DPrinting

MIHAI_T shared this print on MakerWorld! Decorate your Christmas tree with a charming set of flexible baubles featuring multiple delightful patterns ✨. Choose from three available designs, explore a variety of colors, or create your own custom version in Bambu Studio 🎨. You can place the baubles empty on the tree or fill them with […]

Wheels and Bones: a free educational game about wheelchair repair and seating

Wheels & Bones is a free browser game about wheelchair repair and seating, published by GOAT, Grassroots Open Assistive Tech. Players work in a repair shop run by Martin, a zombie, with help from Barty, a ghost. The job is to inspect a chair, find the cause and pick the right tool for faults like […]

Three Dutch computer museums in one week

Marcin Wichary has archived a 2022 Twitter thread on aresluna.org about visiting three Dutch computer museums in one week. The first was HomeComputerMuseum in Helmond, a living room style collection of over 500 machines, mostly 1980s onward, with many powered up and open to visitors. The second was Bonami SpelComputer Museum in Zwolle, a warehouse […]

Electronics Weekly News

Nordic Semi celebrates with micro:bit class kit programme

Nordic Semiconductor is celebrating its 10 years of involvement in the BBC micro:bit with its “micro:bit class kit” programme to help kids start coding. Nordic is offering BBC micro:bit Club […]

The post Nordic Semi celebrates with micro:bit class kit programme appeared first on Electronics Weekly.

Amazon delivering more parcels than traditional carriers

There was a time when Amazon  relied (almost) entirely on traditional carriers to deliver its packages. That dynamic began to shift following the 2013 holiday shopping season, when severe weather […]

The post Amazon delivering more parcels than traditional carriers appeared first on Electronics Weekly.

FormalOS adds structure to RTL verification and sign-off

Lubis EDA has released FormalOs, a verification infrastructure platform which is designed to be a tool-agnostic orchestration layer for verification for SoC, asic and IP sign-off projects. According to the […]

The post FormalOS adds structure to RTL verification and sign-off appeared first on Electronics Weekly.

STMicroelectronics introduces integrated angular rate sensors for ADAS

STMicroelectronics is introducing its first automotive safety combination sensors aimed at mass-market applications, following the integration of NXP’s sensors division. They enable advanced safety and driver-assistance features across categories from […]

The post STMicroelectronics introduces integrated angular rate sensors for ADAS appeared first on Electronics Weekly.

Avnet Silica signs Teltonika Networks for industrial connectivity

Avnet Silica is expanding its support for industrial connectivity following a distribution agreement with Teltonika Networks. It covers, for example, modems, routers, gateways and switches. And also Teltonika’s remote management […]

The post Avnet Silica signs Teltonika Networks for industrial connectivity appeared first on Electronics Weekly.

This website uses cookies to provide a better experience. By selecting Accept, you agree to the use of cookies. Learn more