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

The Countdown to Q-Day Has Begun

Will a quantum computer break blockchain cryptography in just two years' time?

The post The Countdown to Q-Day Has Begun appeared first on EE Times.

Cosmic at SEMICON Europa 2026: Advancing High-Complexity Semiconductor Test Solutions

ALTOPASCIO, Italy — Nov. 9, 2026 — Cosmic Group will participate in SEMICON Europa 2026 in Munich, held concurrently with electronica from Nov. 10 to 13, 2026. Cosmic will be located at booth C1255. Rooted in the tradition of technological innovation “Made in Europe,” the group aligns perfectly with this year’s event focus: “Europe’s Next […]

The post Cosmic at SEMICON Europa 2026: Advancing High-Complexity Semiconductor Test Solutions appeared first on EE Times.

IBM, AMD Mix Quantum and AI at U.S. National Lab

IBM, AMD, and Oak Ridge launch hybrid quantum-classical system to accelerate quantum-error correction research ahead of 2028.

The post IBM, AMD Mix Quantum and AI at U.S. National Lab appeared first on EE Times.

Europe’s Chip Industry: Perfect Storm or Perfect Timing?

At SEMICON Europa 2026, Europe’s chip industry will confront a “perfect storm” of geopolitical, technological, and competitive pressures.

The post Europe’s Chip Industry: Perfect Storm or Perfect Timing? appeared first on EE Times.

EE Times Magazine – November 2026

This edition of EE Times Magazine explores advances in semiconductor manufacturing and packaging, farm autonomy, and Canada’s efforts to commercialize emerging technologies.

The post EE Times Magazine – November 2026 appeared first on EE Times.

Hackaday News

MousePods Reverse Engineers Head Tracking Data From Stubborn AirPods

[Matteo Gaudioso] released MousePods, a Python tool which accesses the motion sensors in Apple AirPods on Linux, turning them into mouse input. No Apple host required. Doing this required reverse-engineering …read more

Using Halftone Images in QR codes Without Upsetting Scanners

Although quick-response (QR) codes are rather simple monochrome affairs, adding embellishments to them is a popular activity, if only to make QR codes not stick out like a sore thumb …read more

Why the ULC Audio Codec is a Perfect Fit for the N64

Although the Nintendo 64 could deliver solid 3D graphics with assets loaded at a blistering speed from the game cartridge, audio-wise it was a bit more hampered. The main challenge …read more

This Week in Security: More Linux Bugs, Biggest Crypto Theft Ever, Prusa Printers, Residential Proxies

Linux kernel bugs which can be triggered remotely, without any login, are rare. Most kernel vulnerabilities need an attacker to already be running code on the machine. CVE-2026-98432 is one of those: …read more

The Goat Emoji Is 100% Valid Machine Code, and It Doesn’t Stop There

Did you know emojis can be executables? Well, they are if you treat them like Intel 8088 or 8086 machine code, anyway. [GloriousCow] shared this clever revelation, demonstrating that executable …read more

Adafruit Blog News

Are contemporary technologies like GPS, phones, and AI deskilling humans?

Jason Kottke posted a short link on kottke.org asking whether tools like GPS, phones, and AI are deskilling the human body. The quote he pulls out makes the case: “In surrendering to a quick technological fix, we are, moment by moment, doing less sensing, navigating, remembering, walking, choosing, and attending.” The argument is about the […]

ESP32 Demoboard: New demo projects using on-board hardware

oeadmin continues the ESP32 demoboard series on Open Electronics with five more Arduino examples that use the board’s OLED display and its plug-in breakout modules. The first reads hand gestures from an APDS-9960 sensor, a part that detects light, color and motion from about 10 to 20 cm away, and prints the direction on the […]

Microsoft’s Canada timezone troubles leave admins fixing calendars, pretending they’re in Bogota

Carly Page at The Register reports on what happened when parts of Canada stopped changing their clocks. As of November 1, affected areas of British Columbia, Alberta, and Manitoba are permanently on UTC-07:00, UTC-06:00 and UTC-05:00. Microsoft’s software hasn’t entirely caught up, so some customers are seeing wrong times and broken schedules. Outlook is the […]

F3D updated, now supports FreeCAD files!

Jo Hinchliffe writes on the FreeCAD blog that F3D, the open source 3D model renderer and viewer, can now open FreeCAD FCStd files as of version 4.0. The simplest way to try it is the public web viewer, which loads a sample file or a file from the local machine. There’s more to it than […]

Sony revives the original Walkman headphones, adds USB-C

Scharon Harding, writing for Ars Technica, covers Sony’s return to the MDR-3 headphones that came out in 1979 next to the Walkman TPS-L2 cassette player. The new model is called the MDR-3R, and it copies the look of the original: a thin gray plastic headband with metal sliders, and round on-ear cushions in orange. Blue […]

Electronics Weekly News

Leap signs MoU to relaunch Sutherland space launches

Leap, a startup aiming to develop mass-producible launch vehicles, has signed a Memorandum of Understanding (MoU) with Highlands and Islands Enterprise (HIE). This is to develop, and relaunch, space launch […]

The post Leap signs MoU to relaunch Sutherland space launches appeared first on Electronics Weekly.

What caught your eye? AI bust, Qualcomm MMIOs, RF emitters

What caught our eye this last week? There's the AI bust, Qualcomm supplying Starlink Mobile’s 5G radio equipment, and identifying hostile RF emitters in battlefield conditions...

The post What caught your eye? AI bust, Qualcomm MMIOs, RF emitters appeared first on Electronics Weekly.

Partying like it’s 1999 with the hangover in 2001

Partying like it’s 1999 without knowing that 2001 would see a 32% fall in the semi market, a chip analyst spun a rosy yarn A 1999 EW story started: ’The […]

The post Partying like it’s 1999 with the hangover in 2001 appeared first on Electronics Weekly.

Emerson NI PXIe instruments for AI-accelerated automated testing

Emerson has announced new NI PXI express instruments featuring an AI-accelerated approach to automated test. The goal, says the company, is to make the testing process more accessible to engineering […]

The post Emerson NI PXIe instruments for AI-accelerated automated testing appeared first on Electronics Weekly.

MDA Space to provide digital antenna subsystems for IRIS² satellites

Canadian space company MDA Space has won a contract from Thales Alenia Space for work on the development of Europe’s IRIS² satellites. Specifically it will begin work on MDA AURORA […]

The post MDA Space to provide digital antenna subsystems for IRIS² satellites appeared first on Electronics Weekly.

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