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

Infineon’s OktoberTech: Edge AI, SDVs, and the Road to 800 VDC

Explore Infineon’s OktoberTech takeaways on edge AI, SDVs, GaN power, and the shift toward 800 V DC data centers.

The post Infineon’s OktoberTech: Edge AI, SDVs, and the Road to 800 VDC appeared first on EE Times.

Samsung Electronics Posts $80B Operating Profit on AI Memory Demand

Samsung reported third-quarter operating profit of $80 billion, but rising component prices caused an operating loss in mobile.

The post Samsung Electronics Posts $80B Operating Profit on AI Memory Demand appeared first on EE Times.

How Vision and Connectivity Enable Autonomous Agriculture

Join this webinar to explore how Gigabit Multimedia Serial Link (GMSL) technology helps enable the next generation of autonomous agricultural equipment.

The post How Vision and Connectivity Enable Autonomous Agriculture appeared first on EE Times.

Smarter Power Sequencing with GreenPAK™

Programmable mixed-signal devices can replace sprawling RC networks and firmware-dependent control with compact, deterministic, and adaptable multi-rail sequencing. 

The post Smarter Power Sequencing with GreenPAK™ appeared first on EE Times.

STMicroelectronics Weighs Developing More Powerful MCUs, MPUs for Humanoid Robots

With humanoid robot designs still evolving and volumes low, STMicroelectronics is watching how the market develops before deciding what to build.

The post STMicroelectronics Weighs Developing More Powerful MCUs, MPUs for Humanoid Robots appeared first on EE Times.

Hackaday News

Snake On a Seven-Segment Display is Gloriously Bad

You’ve no doubt heard the saying, “If something is worth doing, it’s worth doing well.” But there’s actually a counter-perspective to this particular philosophy that says it’s also worth doing …read more

Is This The Only Instrument You Need?

When working on an electronic project it’s likely you will find yourself working with a variety of different instruments, be they logic analysers, oscilloscopes, or whatever. These can take up …read more

Putting a MiSTer Marquee on a Better Display

Some MiSTer users put a small secondary “marquee” display on the FPGA board that can show information about the system such as the currently loaded core and what game it …read more

Replicating the Color-Changing Effect of the Lycurgus Cup

Although most archaeological finds from ancient civilizations aren’t quite as exciting as what you might expect from the movies, occasionally you come across something that’s truly special. The Lycurgus Cup …read more

An Attempt at a Useful Desktop OS For Microcontrollers

We’re living at an interesting time here in 2026, when microcontrollers are becoming powerful enough to surpass the capabilities of “real” computers from a time when those real computers were …read more

Adafruit Blog News

Modular Desk Organizer #3DThursday #3DPrinting

ms520 shares: A desk-side modular system built around a universal clamp (0-40mm range, 33mm depth, 4mm-pitch threads, anti-slip grooves). Core parts: headphone hanger (50mm shaft), phone holder, cup holder (80mm ID), 5mm Skadis section, cable organizer (3 cables), pen holder (50×50×80mm), two-stage hook, tray (62×67mm). ‘New Parts’ add-ons: Skadis adapter, storage box, trash bin, solder […]

Rotating Christmas Ornament – Makerlab #3DThursday #3DPrinting

Shared by Bat3DPrint on Maker World: Add a touch of magic to your Christmas tree with this 3D-printed bauble. Its unique design incorporates a rotating inner ring, embellished with three delicate snowflakes at the apex and an elegant deer at the base. A festive and original adornment, perfect for enhancing your holiday celebrations! Download the […]

Pumpkin Decoration #3DThursday #3DPrinting

klworx shares: A decorative pumpkin with ribbed texture for a cozy handmade look. Each stem is printed separately for color contrast; mix sizes and colors. No carving needed. Three sizes: Small (~59 min, 2 plates), Medium (~1.8h, 2 plates), Large (~2.5h, 2 plates). Designer’s profiles include height range modifiers that print the top of the […]

Low Poly 3D printed Skull Mask #ElectronicHalloween

A face mask is one of the fastest ways to put together an instant Halloween costume! MakingThingsCLT shared this quick 3D print on Printables! I drew this skull mask by manually meshing the polygons in Fusion 360 over a human skull scan from the NIH 3D print database. Thickening the surface didn’t work well in […]

Vintage phone AI assistant

Ramazan Eren Arslan turned a Deutsche Bundespost FeTAp 791 rotary telephone into a voice assistant, with the build documented on Hackster.io. Lift the handset and talk, and Google Gemini answers through the original earpiece. A Raspberry Pi 3B sits inside the phone where the original PCB used to be. The hook switch wires to GPIO […]

Electronics Weekly News

BEAMA sets up power grid group

 BEAMA has launched a new group for UK companies delivering power grid infrastructure, including those working in civil engineering, construction, design, specification and wider services. The Electricity Networks Infrastructure (ENI) […]

The post BEAMA sets up power grid group appeared first on Electronics Weekly.

Intel Q4 forecast disappoints

Intel’s Q3  revenue was $16.5 billion, up 21% YoY. Q4 revenue was forecast at $15 billion to $16 billion; “Our Q3 results demonstrate improving execution, meaningful progress expanding supply and […]

The post Intel Q4 forecast disappoints appeared first on Electronics Weekly.

Nordic demo-es Bluetooth HDT

Nordic Semiconductor, the low-power wireless connectivity specialist. Has demo-ed  the upcoming Bluetooth® High Data Throughput (HDT) feature in silicon through its video demonstration. With support for longer packets, Bluetooth HDT […]

The post Nordic demo-es Bluetooth HDT appeared first on Electronics Weekly.

The Pickering Remote Gateway

Pickering Interfaces of Clacton-on-sea, provider of modular signal switching and simulation solutions for electronic test and verification, has introduced the Pickering Remote Gateway. The new gRPC-based software enables engineers to […]

The post The Pickering Remote Gateway appeared first on Electronics Weekly.

CELUS offers trial of agentic workflow for electronic design

CELUS today launched an agentic workflow for its Design Assistant. The workflow helps hardware engineers plan the architecture and component work at the start of an electronics design, before schematic capture, […]

The post CELUS offers trial of agentic workflow for electronic design appeared first on Electronics Weekly.

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