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

Saskatchewan’s Semiconductor Strength Is Connecting the Pieces

Saskatchewan brings together AI infrastructure, quantum research, chip design talent, and advanced materials expertise to expand its role in Canada’s technology ecosystem.

The post Saskatchewan’s Semiconductor Strength Is Connecting the Pieces appeared first on EE Times.

People Detection in Confined Spaces: Elevator Application

This technical white paper details an embedded occupancy-monitoring solution for elevator cabins combining the Melexis MLX90642 Far-Infrared (FIR) thermal sensor array with a hardware-agnostic People Detection Library. Engineered to overcome the limitations of optical cameras, PIR sensors, and floor load cells, the solution provides guaranteed privacy-by-design via local edge processing and thermal imaging without cloud […]

The post People Detection in Confined Spaces: Elevator Application appeared first on EE Times.

The AI Power Bill: Who Gets Grid Capacity, and Who Bears the Risk?

As electricity access becomes a financial barrier to AI expansion, the U.S. and China face different risks in building the infrastructure of the digital economy.

The post The AI Power Bill: Who Gets Grid Capacity, and Who Bears the Risk? appeared first on EE Times.

Bluetooth® High Data Throughput: a Foundation for Next Generation Wireless Experiences

Bluetooth® High Data Throughput enables faster data transfer, greater capacity, energy efficiency, and reliability for advanced wireless applications.

The post Bluetooth® High Data Throughput: a Foundation for Next Generation Wireless Experiences appeared first on EE Times.

What It Takes to Let a Farm Robot Work Alone

Safe agricultural autonomy depends on matching safeguards to the machine, its surroundings, and the people who interact with it.

The post What It Takes to Let a Farm Robot Work Alone appeared first on EE Times.

Hackaday News

Gesture Controls With Only a Camera

Back in 2002, [Takahiro Yonemura] and others built a system that used a single webcam-like device to track a user’s hand and generate inputs for a computer. Given that this …read more

How CRISPR Could Mark Mutated Cancer Cells for Termination

Over the past decades CRISPR, short for “clustered regularly interspaced short palindromic repeats”, has become somewhat of a household name, holding the promise of directly addressing genetic mutations by effectively …read more

Simulating and Visualising the Central Limit Theorem

Statistics is one of those fields which people tend to love or hate when they’re confronted with it during their school time. Although incredibly useful and even essential in many …read more

DeviceTree For Hackers: Intro

Raspberry Pi has just leaked information on the Pi Zero 3W. They did it by publishing a DeviceTree file that describes the hardware of the Pi Zero. This is how …read more

Have You Ever Heard Of the Lobo MAX-80?

[Adrian Black]’s enthusiasm is palpable as he shows off something truly unusual: a Lobo MAX-80 computer from 1982. To call this machine rare would be an understatement, as the company …read more

Adafruit Blog News

Web satellite tracker plays the music of the spheres #ArtTuesday

OrbitalWiki’s listening page turns satellite passes into sound. Active satellites play one note at the moment they’re highest in the sky over a chosen spot, so the result is a live, location-specific piece of music. The page pulls the latest CelesTrak element sets for every active satellite in the catalog from a single free endpoint, […]

Hardware in the loop (HIL) workflow writes ESP32 code and runs hardware tests autonomously

Julian Horsey at Geeky Gadgets writes about a hardware in the loop (HIL) development setup from Andreas Spiess that has an AI write ESP32 firmware and then test it on real hardware. It’s called the Embedded AI Harness, a framework that ties the AI together with the hardware and the test scripts. The AI writes […]

Darling now embraces AI for running macOS binaries on Linux

Michael Larabel writes at Phoronix that the Darling project is now using AI in its work on running macOS binaries on Linux. Darling is an open source translation layer, roughly the macOS counterpart to what Wine does for Windows software. It reimplements Apple’s frameworks and system libraries so that macOS programs can run on a […]

Formalizing CPython

A project posted at broyojo.com used AI agents to rewrite CPython’s internals in Lean, a language where a computer can check mathematical proofs. The Lean copies follow the C source line by line, including how the C code’s numbers wrap around when they get too big. So far that’s 613,318 lines of Lean across 1,539 […]

DIY ESP32 Flipper Zero alternative custom cybersecurity multi-tool

Julian Horsey at Geeky Gadgets writes about a homemade take on the Flipper Zero, built by Yellow Purple from an ESP32 microcontroller and an OLED display. The result is a small handheld tool for trying out cybersecurity ideas, with the display showing menus and output while the ESP32 does the radio work. The WiFi functions […]

Electronics Weekly News

ESA signs OHB for next-gen Sentinel-3 topography mission

The German space systems integrator OHB has been awarded, by the European Space Agency (ESA), a €554 million contract for two next-gen Sentinel-3 topography satellites. The Sentinel-3 Next Generation Topography […]

The post ESA signs OHB for next-gen Sentinel-3 topography mission appeared first on Electronics Weekly.

Tardy

According to tech Taiwan, reported by Wcctech, MediaTek people who are using Intel’s  EMIB-T packaging technology have had a complaint from Intel engineers about their demands for quick answers to […]

The post Tardy appeared first on Electronics Weekly.

Nickel/aluminium is the smarter alternative to traditional silver/aluminium EMI shielding materials

Nickel-aluminium (Ni/Al) is emerging as an alternative to silver-aluminium (Ag/Al) in shielding applications, writes Rachid Ait El Cadi. For decades Ag/Al conductive elastomer gaskets have occupied a leading position in electromagnetic […]

The post Nickel/aluminium is the smarter alternative to traditional silver/aluminium EMI shielding materials appeared first on Electronics Weekly.

TSMC October revenues up 59.7% YoY

TSMC today announced a 59.7% rise YoY and a $14.7% rise  MoM for its October revenue of $17.8 billion. Revenue for January through October 2026 totaled $136.2 billion, an increase […]

The post TSMC October revenues up 59.7% YoY appeared first on Electronics Weekly.

Infineon expects a €20bn 2027

Infineon had Q4 FY 2026 revenue  of €4.706 billion for profit of €1.119 billion at a margin of 23.8% For FY 2026 it had revenue of €16.353 billion, up 12up […]

The post Infineon expects a €20bn 2027 appeared first on Electronics Weekly.

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