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

Dukosi Samples Contactless Battery Communication System for EVs, Grid Storage

Dukosi DK-NFLNK provides synchronous communication with DKCMS battery monitoring systems.

The post Dukosi Samples Contactless Battery Communication System for EVs, Grid Storage appeared first on EE Times.

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.

Hackaday News

Why Engineers are Forced to Create Junk Designs

It’s become a bit of a platitude to state that products were manufactured better in ‘the olden days’, but as [The Meandrous Engineer] covers in a recent video essay, the …read more

This Coffee Machine is DOOMed

Somehow, seeing DOOM on things that were never meant to run DOOM never gets old. It’s probably hard to get further into the “never meant to run DOOM” weeds than …read more

Print & Place: Add Embedded Electronics While FDM Printing

Although combining electronics and 3D-printed structures is fairly common, this usually entails some level of manual assembly. This contrasts strongly with the Print & Place approach demonstrated by [Oliver Child] …read more

Watching the Watchers

Although it used to be a much more rare event, now almost any time at dawn or dusk, provided clear weather, a human observer can walk outside, look up, and …read more

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

Adafruit Blog News

The Python on Microcontrollers Newsletter: subscribe for free

The Python for Microcontrollers Newsletter is the place for the latest news involving Python on hardware (microcontrollers AND single board computers like Raspberry Pi). This ad-free, spam-free weekly email is filled with CircuitPython, MicroPython, and Python information that you may have missed, all in one place! You get a summary of all the software, events, projects, and the latest hardware worldwide once a week, no […]

Commodore officially launches the Callback 8020 flip phone

TheGavinSheehan at Bleeding Cool writes that the modern Commodore has announced the Callback 8020, a flip phone styled after the Y2K era. It runs Sailfish OS, a Linux-based mobile operating system with roots in Nokia’s old phone software, adapted for the Callback through a partnership with Jolla. Jolla is the Finnish company started by former […]

Art Week NYC is Upon Us

Artforum, Art in America, and ARTnews is happening the 11th through the 14th across 32 participating institutions across the city. Check out what is happening during Art Week NYC! Art Week NYC is a dynamic new highlight on the city’s cultural calendar, spanning neighborhoods and venues across the city. An expansive celebration of art and […]

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 […]

Electronics Weekly News

Electronica – The latest news roundup

Don’t miss the Electronics Weekly roundup of all our latest news from Electronica, the bi-annual event running from 10-13 November in Munich. Electronica is the world’s biggest electronics show, and Electronics […]

The post Electronica – The latest news roundup appeared first on Electronics Weekly.

Minew MG10 Bluetooth base station builds sub-meter indoor positioning

Minew is introducing the MG10, a Bluetooth AoA (Angle of Arrival) positioning base station, supporting 0.1 to 1 meter accuracy. It is designed to enable high-precision indoor positioning in real-time […]

The post Minew MG10 Bluetooth base station builds sub-meter indoor positioning appeared first on Electronics Weekly.

Google pairs TPU with Arm Neoverse

Google Cloud is pairing​​ ​its TPU 8i Max system​s​ ​with​ Arm-based ​Axion processors that are custom Arm Neoverse-based CPUs​ With TPU 8i Max, Google is extending its use of Axion […]

The post Google pairs TPU with Arm Neoverse appeared first on Electronics Weekly.

Imec delivers baseline flows for NanoIC line interposer

Imec has delivered the baseline flows for the silicon interposer platform being developed within the NanoIC pilot line. Providing an early technical view of a key technology for chiplet integration, […]

The post Imec delivers baseline flows for NanoIC line interposer appeared first on Electronics Weekly.

Electronica: TME showcases the ‘Dual Brain’ Arduino VENTUNO Q

Distributor TME (Transfer Multisort Elektronik) showcased the Arduino VENTUNO Q at this year’s electronica. The high-performance single-board computer (SBC) targets Edge AI, robotics, and real-time control applications, reflecting the prominence […]

The post Electronica: TME showcases the ‘Dual Brain’ Arduino VENTUNO Q appeared first on Electronics Weekly.

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