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

Chris Lattner: AI Code Generation Doesn’t Solve Software Engineering

AI can generate low-level code, but code generation is also making it harder to build and maintain the software ecosystems we need.

The post Chris Lattner: AI Code Generation Doesn’t Solve Software Engineering appeared first on EE Times.

How Singapore Connects Chip Research, Startups, and Manufacturing

From SiC power devices to silicon photonics, Singapore is building the infrastructure and industrial partnerships needed to bring deep-tech research to market.

The post How Singapore Connects Chip Research, Startups, and Manufacturing appeared first on EE Times.

Building Physical AI Systems That Can Work in the Real World

Build scalable physical AI by balancing compute, power, safety, and cost—see why system architecture outperforms raw model size.

The post Building Physical AI Systems That Can Work in the Real World appeared first on EE Times.

Precision Timing Special Report

Choose timing with confidence: compare crystals, oscillators, RTCs, MEMS, and atomic references for reliable designs—download the guide.

The post Precision Timing Special Report appeared first on EE Times.

Video Interview: Applied Materials CEO on the Economics Behind Its $5B EPIC Bet

Following the unveiling of its EPIC Center, Applied Materials revealed strong financial projections. We look at how it all ties together and feature a new video interview with CEO Gary Dickerson.

The post Video Interview: Applied Materials CEO on the Economics Behind Its $5B EPIC Bet appeared first on EE Times.

Hackaday News

Going Whole-Hog on a First Satellite Ground Station

When most radio enthusiasts start trying to pick up signals from satellites, they might put together a quick-and-dirty Yagi antenna and try to catch a repeater as is passes overhead, …read more

NASA’s Lunar Grounding Challenge is a Real Buzz

One could make a joke about how an astronaut walking on the lunar surface is rather akin to a cat walking on the carpet in the living room, but out …read more

Spreading Life to Bleached Coral

Coral bleaching is a major problem for ocean ecosystems as the ocean gets warmer. Researchers at Stanford have found a new method for regenerating bleached corals. Scientists working on coral …read more

Super Mario Galaxy Now Runs on the GBA

Joining the ranks of fresh backported Nintendo games is Super Mario Galaxy for the Nintendo Game Boy Advance (GBA), courtesy of [Tobias Friedly], AKA [Tobi]. In a recent video he announces …read more

Visualize Regular Expressions with Marbles

If you are one of those people who visualize things physically better than in the abstract, then Regex Marble Run by [bottomless] might be for you. You enter a test …read more

Adafruit Blog News

P. S. Art 2026 Celebrates NYC Through The Lens of City Kids

Nia Obrien (Grade 8), The Speed of Life (detail), 2026. Digital photograph. Lower Manhattan Community Middle School, Manhattan. Teacher: Jessica Sinclair via The Metropolitan Museum of Art Artists from prekindergarten through grade 12 created collages, drawings, mixed-media pieces, paintings, photographs, prints, sculptures and more for this year’s P. S. Art. The selected pieces are on […]

JP’s Product Pick of the Week — 3pm Eastern TODAY 10/20/26 @adafruit #adafruit #newproductpick

Come on by for JP’s Product Pick of The Week ! A new product pick will be revealed. The show airs at 3pm ET / 12pm PT Check out the livestream right here inside this product page you won’t want to miss it because there will be a LARGE DISCOUNT during the show! Tune in […]

Trick-or-Streets is Back for 2026!

Explore the interactive map to find events big and small close to you This is the fifth year the NYC DOT compiled the Trick-or-Streets list. These are streets, plazas, and other corridors that are shutting out cars and creating pedestrian friendly Halloween activities. Checkout the map and links to plot your macabre merrymaking. From now […]

Remote Control with the Huzzah + Adafruit.io #AdafruitLearn

This guide will show you how to send button press data to Adafruit IO from the HUZZAH ESP8266, then use that data to change the color of an LED connected to a second HUZZAH ESP8266. If you haven’t worked your way through the Adafruit IO feed and dashboard basics guides, you should do that before continuing […]

Off The Cloud: a Raspberry Pi 5 that replaces Google Photos

I feel constantly overwhelmed and inundated by both our ever-growing stock of digital photos and the need to pay multiple companies to store said photos. This clever and handy project from maker Alonso Vidales proposes a DIY solution to that very issue: Google Photos and iCloud are convenient, but they keep a family’s photos on […]

Electronics Weekly News

Innodisk’s DDR5 8000 RDIMM addresses edge AI

Innodisk is expanding its DDR5 portfolio with 8000 RDIMM for compute-intensive applications, such as edge AI and enterprise servers. As the name indicates, the modules deliver data transfer speeds of […]

The post Innodisk’s DDR5 8000 RDIMM addresses edge AI appeared first on Electronics Weekly.

Foreigners buying US shares for AI bet

Foreign buying of US shares has increased sharply in the last four years, according to the IMF. The figures published in the IMF Global Financial Stability Report this October are […]

The post Foreigners buying US shares for AI bet appeared first on Electronics Weekly.

UK Space Agency makes grant call for Emissions Monitoring

The UK Space Agency (UKSA) is making another grant call under its Unlocking Space for Business (USB) programme, with funding of up to £2 million available to UK-based companies. It […]

The post UK Space Agency makes grant call for Emissions Monitoring appeared first on Electronics Weekly.

The rise of MEMS switches in electronics

When voltage is applied, the beam touches the substrate. The MEMS switch turns on MEMS switches are gaining popularity in AI-driven optical networks, datacentres and other areas, and are considered […]

The post The rise of MEMS switches in electronics appeared first on Electronics Weekly.

Get Mannerisms, Gadget Master, the Daily and the Weekly, in newsletter form

Let our content come straight to you! Easily digestible newsletter emails straight to your inbox. And all the newsletters are mobile optimised.

The post Get Mannerisms, Gadget Master, the Daily and the Weekly, in newsletter form appeared first on Electronics Weekly.

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