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

How AI Redefines Semiconductor Manufacturing, From Materials Up

AI chip advances depend on more than design, requiring new materials, manufacturing equipment, and packaging technologies to meet rising performance demands.

The post How AI Redefines Semiconductor Manufacturing, From Materials Up appeared first on EE Times.

Canadian Startup Aims to Be Quantum’s ‘Picks’ and ‘Shovels’ 

Toronto-based Meissner Technologies uses AI and laboratory testing to discover superconducting materials that could cut cooling costs and help quantum computers scale.

The post Canadian Startup Aims to Be Quantum’s ‘Picks’ and ‘Shovels’  appeared first on EE Times.

SK Hynix Reports Record Q3 Results Driven by AI Memory Surge

Long-term customer contracts and rising chip prices point to a change in how memory manufacturers manage multi-year production capacity and capex.

The post SK Hynix Reports Record Q3 Results Driven by AI Memory Surge appeared first on EE Times.

Secure Safety and Security Communications

This whitepaper explores how building safety and security systems can overcome the limitations of legacy RS-485 networks by adopting Single Pair Ethernet (SPE). It examines the growing demands of AI-enabled surveillance, access control, cybersecurity, and system convergence, while highlighting how SPE delivers secure, scalable communications over existing infrastructure. Readers will learn about SPE architectures, migration […]

The post Secure Safety and Security Communications appeared first on EE Times.

Full-Stack Semiconductor Solutions for Embodied AI & Robotics

NSING Technologies, a Singapore-founded semiconductor company, presents this whitepaper on its full-stack semiconductor solutions for embodied AI and robotics, built around high-performance MCUs, security ICs, wireless connectivity and BMS ICs. The document explains the industry shift toward distributed robotic architectures that combine AI main control with deterministic real-time joint, motor and sensor nodes. It details […]

The post Full-Stack Semiconductor Solutions for Embodied AI & Robotics appeared first on EE Times.

Hackaday News

Magnetic Lock Opens By Magic

Over on IEEE Spectrum, [Stephen Cass] has a project that would probably have seemed like a magic a few centuries ago. Imagine a box that uses a magnetic device to …read more

2026 Retrocomputing Challenge: Custom RISC-V Processor For Retro System

Although once little more than an academic endeavor, the RISC-V architecture is slowly supplanting applications that would have normally gone to ARM. Even a few microcontrollers have chips running this …read more

Battery Prototype Uses Superextensive Quantum Effects to Charge Faster

Although the term ‘quantum battery’ is a bit of a vague term, the cell that [Kieran Hymas] et al. demonstrate in a recent paper does seem to suggest that it …read more

Hacking the Modern Tamagotchi With UART

Although not technically the first virtual pet, the Tamagotchi handhelds certainly popularized the idea and made it a worldwide phenomenon. In the late 90s it was hard to go out …read more

Does Running an E-Paper Display at 30 FPS Destroy It?

Although e-paper displays are famous for being low-power and lasting essentially forever if not damaged physically, the recent push to drive even cheaper e-paper displays at a framerate like 30 …read more

Adafruit Blog News

Kitchen Gridfinity Measuring Cups and Spoons – Hilbert Top Texture #3DThursday #3DPrinting

enzo_dog shares: Two Gridfinity-compatible bins that keep measuring cups and spoons organized — each with a dedicated spot. Default ‘Hilbert’ top-layer texture can be changed in the slicer. Larger container fits measuring cups up to 92mm (3.6″) diameter; smaller container fits measuring spoons up to 21.5mm (0.84″) diameter. Prep-cooking essential — great Thanksgiving-week pick for […]

RAK19003 Meshtastic 1×18650 Weather Resistant Case #3DThursday #3DPrinting

juergen_ shares: A LoRa/Meshtastic case for the RAK Wisblock 19003 that uses one 18650 battery. Modified/remixed from DeMeshe Node’s 19007 case. Compatible with the RAK 19003 only (tags also mention 19007 but description limits to 19003). Includes a small SMA-port guard protecting the antenna plug. 0.2mm layers, 3 walls, 10% infill, ~2.2h, 47g PETG, 1 […]

Kitchen Gridfinity Modular Knife Block – 3 Slots#3DThursday #3DPrinting

enzo_dog shares: Modular Gridfinity knife holders — mix and match 36 block sizes for different blade heights/lengths, plus two handle rest styles and spacer pieces for custom layouts. Customize directly on MakerWorld. 36-plate set: blocks with 3 regular slots, 2×1 to 2×6 length, 3u to 8u tall. Legacy Set (4 blocks): Large (2×6×8u), Medium (2×4×7u), […]

From the mail bag…

From the mail bag! ong time customer here. (maybe a decade? certainly not as long as some, i’m sure) i just wanted to send an “we appreciate you!” message (the royal “you”, obviously. all the named and unnamed folks that make, and have made, adafruit possible) i have learned SO VERY much in that time […]

Mini-LED-Christmas-Tree Tealight #3DThursday #3DPrinting

Allpa_112 shares: A small Christmas tree for a shelf, windowsill, or desk. Base fits over an LED tealight so the tree glows and flickers in the dark. Base designed for a 36×18mm tealight (also versions for 37.2×18.4mm, 37×20mm, and 40×23mm; designer takes requests). Tree is printed in spiral vase mode — quick to print. Base […]

Electronics Weekly News

“Reassuringly boring” budget

“Reassuringly boring “ was one judgment on yesterday’s budget, meaning that it didn’t upset the bond market. £18 million has been allocated for a new UK advanced chip design Academy […]

The post “Reassuringly boring” budget appeared first on Electronics Weekly.

onsemi rumoured to be in talks to acquire Ferric

onsemi is in talks to acquire Ferric, a 16 year-old New York-based semiconductor startup for close to $1 billion, reports The Information. Ferric specialises in integrated voltage regulators (IVRs) and  […]

The post onsemi rumoured to be in talks to acquire Ferric appeared first on Electronics Weekly.

Seoul Viosys producing white LEDs without rare earths

Seoul Semiconductor and its affiliate Seoul Viosys have begun mass production of WICOP 3 – an LED which emits white light without using rare earths. White LEDs have depended on […]

The post Seoul Viosys producing white LEDs without rare earths appeared first on Electronics Weekly.

PCB industry succumbing to ‘semiconducterisation’

The PCB industry closed 2025 at about $88 billion in revenue, and a conservative forecast puts it at $140 billion by 2031, following an 8.1% CAGR. That headline figure averages […]

The post PCB industry succumbing to ‘semiconducterisation’ appeared first on Electronics Weekly.

Toshiba in mass production of entry-class M4H Group MCUs

Toshiba has started mass production of three Entry-Class M4H Group  MCUs  for system control in consumer and industrial equipment. The MCUs are designed for consumer products such as air conditioners […]

The post Toshiba in mass production of entry-class M4H Group MCUs appeared first on Electronics Weekly.

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