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

Benchmark Electronics’ Thailand Operations Focus on High-Mix Manufacturing

Benchmark Electronics combines engineering expertise, workforce development, and flexible production to expand high-mix electronics manufacturing across Thailand.

The post Benchmark Electronics’ Thailand Operations Focus on High-Mix Manufacturing appeared first on EE Times.

Beyond Lithography: 3D Scaling Puts New Demands on Materials

ASM International shows how building increasingly complex 3D devices requires advances in materials and processes.

The post Beyond Lithography: 3D Scaling Puts New Demands on Materials appeared first on EE Times.

Co-Packaged Optics Moves from Promise to Production Planning

At Ayar Labs CPO Summit, Meta, Broadcom, AMD, and others weighed in on readiness for a 2028 co-packaged optics demand surge and the OCI MSA’s role.

The post Co-Packaged Optics Moves from Promise to Production Planning appeared first on EE Times.

VICFUSE UL Standard Class Series Fuse Holders: Quality, Reliability, and Industrial Protection

Explore VICFUSE's Class CF fuse line, which offers current-limiting technology and meets Class J performance standards in a compact design.

The post VICFUSE UL Standard Class Series Fuse Holders: Quality, Reliability, and Industrial Protection appeared first on EE Times.

TIE Showcases Taiwan’s Push to Deploy AI Across Industries

Discover how Taiwan Innotech Expo 2026 showcased AI solutions designed to advance industries with practical, real-world impact

The post TIE Showcases Taiwan’s Push to Deploy AI Across Industries appeared first on EE Times.

Hackaday News

Using an ESP32-C3’s RF Hardware for DVB-S2 Video Transmission

Generally the DVB-S and -S2 standards require a satellite somewhere in Earth orbit to provide a signal to receive, but you can also transmit your own DVB-S2 stream with any …read more

Tiny e-Paper Display Delivers 30 FPS of Game Boy Fun

Slow refresh, ghosting and low-contrast — wait, are we talking about passive matrix LCDs, or e-paper displays? That might be why e-paper Game Boy emulators are a thing: the limitations …read more

2026 Hackaday Supercon: Workshops are Open!

Supercon is Hackaday’s annual gathering, and you absolutely need to be there. Today, we’re pleased to announce our lineup of workshops, and it’s more than we’ve ever offered, thanks to …read more

DIY Force Sensing Joysticks are a Cheap Way To Go

Traditional joysticks typically use potentiometers or hall effect sensors to determine the displacement of the stick itself when moved by the operator. Force-sensing joysticks are considered more desirable for certain …read more

What’s a Nonius?

If you already know what a nonius is, you can probably skip this post. But, if like us, you would have to look it up, we’ll tell you what we …read more

Adafruit Blog News

How to migrate Windows 11 from an old SSD to a new NVMe SSD without reinstalling

Julian Horsey at Geeky Gadgets walks through moving a working Windows 11 install from an older SATA SSD to an NVMe drive by cloning the disk instead of reinstalling. The point he keeps returning to is that Windows does not live in one partition. The EFI System Partition and the Windows Recovery Environment have to […]

Today’s Guide Update adds DVI audio to DVI video in CircuitPython

Have you wanted to add audio to your DVI video in CircuitPython? In games, programs, etc.? Now you can! In the latest bleeding edge version of CircuitPython, DVI audio has been added. Several examples show you how to implement things currently. Later updates to CircuitPython may add additional capabilities into the mix. This is to […]

Build a 10.1-inch Home Assistant panel with an ESP32-P4

Julian Horsey at Geeky Gadgets writes up a build from Techiesms that turns an ESP32-P4 module into a wall-mounted Home Assistant control panel. The hardware is a 10.1-inch TFT LCD with a 1200×800 capacitive touchscreen that handles up to five touch points. The ESP32-P4 behind it has a dual-core 400 MHz processor, 16 MB of […]

Epic Games reportedly pivoting to “AI first” game development model

Kyle Orland reports at Ars Technica that Epic Games is moving to an “AI first” development strategy for its collaboration with the Walt Disney Company. Citing a Bloomberg report based on internal employee messages, the story says AI models will write all the code and guide all the artwork for an upcoming shooter. Human developers […]

Improving Epinephrine Injections with a Wearable

Components of the wearable AI device that monitors physiological indicators for anaphylaxis and intervenes by administering an epinephrine injection. (Purdue University photo/Johana Elisa Vargas Gómez) via PPurdue University Professor Muhammad Hussain from Purdue University is leading a team of electrical and computer engineers working on developing a wearable device capable of rapid epinephrine administration. The […]

Electronics Weekly News

10 years of TME Education – a decade of supporting technical education

Learn more about TME Education – an educational project based on practical learning and collaboration with local communities.

The post 10 years of TME Education – a decade of supporting technical education appeared first on Electronics Weekly.

Vishay optical sensors target battery management, energy storage

Vishay’s new automotive grade optical sensors address challenges in modern battery management, energy storage, and industrial automation systems. The four new devices combine an infrared (IR) emitter and PIN photodiode […]

The post Vishay optical sensors target battery management, energy storage appeared first on Electronics Weekly.

Datacentre? Not In My Backyard

Ballotpedia has counted 35 local measures on the ballot in the US November 3 midterm elections  aimed at banning or restricting the construction of new datacentres. Ohio has 21 such […]

The post Datacentre? Not In My Backyard appeared first on Electronics Weekly.

In conversation with Siemens on semiconductor test technology

Electronics Weekly recently caught up with Lee Harrison, Director of Product Marketing at Tessent, Siemens Digital Industries Software, to discuss the latest semiconductor test technology. Topics include silicon lifecycle management, […]

The post In conversation with Siemens on semiconductor test technology appeared first on Electronics Weekly.

TechPoint buys Esprit Electronics for EMS growth

TechPoint has announced it is buying Esprit Electronics, to strengthen its UK manufacturing capability and support its growth ambitions, says the company. “We’re delighted to welcome the Esprit Electronics team […]

The post TechPoint buys Esprit Electronics for EMS growth 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