Free practical electronics engineering calculators for circuit design, components, RF, power electronics, batteries, signal analysis and electrical engineering.
Explore calculators covering fundamental circuits, passive components, RF and signal analysis, batteries, electrical units and practical hardware engineering.
Calculators for voltage, current, resistance, power, dividers, time constants and resonance.
Practical calculators for resistors, capacitors and inductors used in everyday circuit design.
Calculators for wavelength, frequency, antennas, dB, dBm and signal relationships.
Tools for electrical power, batteries, stored energy and practical power-system calculations.
Convert frequency and period and work with timing relationships used in digital and analog electronics.
Convert common electrical engineering units and signal levels quickly without leaving the Octopart platform.
Browse the available Octopart.org calculators. Each tool provides the relevant formula, inputs, worked examples and practical engineering notes.
Fundamental voltage, current, resistance, power and circuit relationships.
Calculate voltage, current, resistance and power using Ohm's law.
Open CalculatorCalculate divider output voltage, current and resistor power.
Open CalculatorCalculate current distribution through parallel resistor branches.
Open CalculatorCalculate electrical power from voltage, current and resistance.
Open CalculatorCalculate RC and RL time constants and related circuit timing values.
Open CalculatorCalculate LC and RLC resonant frequency from inductance and capacitance.
Open CalculatorComponent values, combinations, stored energy and electrical characteristics.
Decode 3-digit, 4-digit, R-marked and EIA-96 SMD resistor markings.
Open CalculatorDecode resistor values from common color-band markings.
Open CalculatorCalculate total resistance, circuit current, voltage drops and power for series resistors.
Open CalculatorCalculate equivalent resistance for parallel resistor networks.
Open CalculatorCalculate capacitive reactance from frequency and capacitance.
Open CalculatorCalculate inductive reactance from frequency and inductance.
Open CalculatorCalculate equivalent capacitance, charge and voltage distribution.
Open CalculatorCalculate total capacitance for parallel capacitor networks.
Open CalculatorTools for frequency, wavelength, antennas, signal levels and RF engineering.
Estimate quarter-wave and other antenna lengths from operating frequency.
Open CalculatorConvert voltage ratios to dB and dB values back to voltage ratios.
Open CalculatorConvert RF power levels between dBm, watts, milliwatts and microwatts.
Open CalculatorConvert frequency to period and period to frequency across common units.
Open CalculatorPractical tools for electrical power, battery capacity and stored energy.
Estimate battery runtime from capacity, voltage, load and efficiency.
Open CalculatorConvert electrical engineering quantities and signal-related units.
Convert common electrical units including voltage, current, resistance, capacitance, inductance, frequency and power.
Open ConverterConvert between frequency and wavelength for RF, optical and acoustic applications.
Open ConverterThe calculator library will continue expanding into PCB engineering, embedded systems, power electronics, RF and hardware manufacturing.
Ohm's law, voltage and current dividers, resistance, power, capacitors, inductors, RC circuits and resonance.
Resistor color codes, SMD markings, capacitor codes, component combinations, energy storage and practical component calculations.
Wavelength, antennas, dB, dBm, attenuation, signal ratios, RF systems and transmission-line calculations.
Trace width, via current, impedance, PCB stackups, converters, batteries, thermal calculations and power-system tools.
Future tools can include UART, SPI, I²C, PWM, clocks, BOM analysis, PCB manufacturing, assembly and hardware production utilities.
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.
Stay updated with the newest trends in electronics, hardware, and embedded systems.
Celestica and Broadcom explain how integrated optics can cut power and latency for AI data centers—watch the OCP Summit partner interview.
The post Advancing Integrated Optics: Celestica & Broadcom Interview at OCP Global Summit appeared first on EE Times.
AI data centers need faster, resilient power; learn how microgrids, storage, and intelligent controls can ease grid constraints in this partner interview.
The post Powering AI Data Centers: Rethinking Energy Infrastructure for the Next Wave of AI Growth appeared first on EE Times.
Silicon carbide demand surges, but Europe risks hollow sovereignty as investment flows abroad; see why Bulgaria’s fab needs customers first.
The post Still Looking for Diamonds appeared first on EE Times.
Security and portable camera designers must balance image quality, power consumption, connectivity, and system cost across widely different operating environments. This guide provides a practical system-level reference for surveillance cameras, video doorbells, body cameras, trail cameras, action cameras, and dashboard cameras. It explains how low-power motion detection, high dynamic range, near-infrared sensitivity, and region-of-interest processing […]
The post Designing Smarter Security and Portable Camera Systems appeared first on EE Times.
DeepX is targeting edge markets including robotics with its second-generation AI accelerator, which can run large LLMs on device in under 5 W.
The post DeepX Tapes Out Second-Gen Chip, Projects 6.7× Performance Gain With LPDDR5x-PIM appeared first on EE Times.
CesiumAstro, the satellite antenna specialist, has closed $730 million in Series D financing. Its payloads – the company highlights – combine active phased array antennas, RF front ends, analogue and […]
The post CesiumAstro satellite antenna specialist raises $730m appeared first on Electronics Weekly.
After Jensen Huang (pictured) admitted an affair with Alice Huang, a senior executive at Singapore datacentre company Megaspeed, who US intelligence officials believe is a Chinese spy. The board of […]
The post Jensen Huang apologises: Nvidia board investigates appeared first on Electronics Weekly.
TSMC is said to have appointed vice-president Hsu Kuo-Chin to look at how the company could get into 3D DRAM, according to multiple industry reports, but it would seem that […]
The post TSMC rumoured to be eyeing 3D DRAM appeared first on Electronics Weekly.
Toshiba Europe has been awarded a contract by Innovate UK, part of UK Research and Innovation (UKRI), to develop technologies that can help unlock the commercial potential of quantum networks. […]
The post Toshiba gets £20m government contract to commercialise quantum appeared first on Electronics Weekly.
Europe AI companies raised $27.6bn in the first nine months of 2026, up 3.2-times from $8.6bn in 9M 2025, says Tracxn Technologies. The 10 largest rounds raised $19.0bn of that, […]
The post European AI companies have raised $27.6bn this year appeared first on Electronics Weekly.