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.
Japan’s $21B offer to GlobalFoundries would add two New York fabs and lift U.S. chip capacity 10%; see why analysts warn on state support.
The post Japan Offers GlobalFoundries $21B for U.S. Fab Expansion appeared first on EE Times.
Data orchestration gives semiconductor engineering teams a practical way to unify disconnected equipment, systems, and data without replacing existing infrastructure. By creating a connected execution layer across engineering, OT, IT, facilities, and production environments, the solution contextualizes real-time information and converts insights into coordinated action. Engineers can identify root causes faster, anticipate equipment failures, automate […]
The post Data Orchestration: The Foundation for the Next-generation Semiconductor Enterprise appeared first on EE Times.
Discover Hynetek’s HUSB237, a compact USB-PD sink controller enabling firmware-free USB-C upgrades up to 100W with only two external components.
The post HUSB237: The Cost-Effective PD Sink with Just 2 Passives appeared first on EE Times.
A Fraunhofer–IMS Nanofabrication partnership illustrates how Europe's low-volume semiconductor manufacturing can support the world's most advanced chipmaking.
The post Small Volumes, Big Impact: Europe’s Hidden Role in Advanced Chipmaking appeared first on EE Times.
Grid modernization is expanding the energy sector’s cyberattack surface, while limited visibility across IT and OT networks leaves connected assets exposed.
The post Grid Modernization’s Hidden Cost: A Growing Attack Surface Few Are Watching appeared first on EE Times.
There was once a mega-company which was in trouble – its market cap of $96 billion was down 80% from its value 18 years earlier. It had made an annual […]
The post Fable: The Commonsense CEO appeared first on Electronics Weekly.
The UK’s Defence Science and Technology Laboratory (Dstl) has been trialling – in a HEADS UP project – a human-centred design approach to novel technologies that are worn or carried. […]
The post HEADS UP – Dstl trialling safe usage of head-mounted military technology appeared first on Electronics Weekly.
Critical National Infrastructure (CNI) products may remain in service for 10 or even 20 years. During that time software changes, attack techniques evolve and regulation becomes more demanding, writes Jim […]
The post Beyond software patching: how CHERI can limit the blast radius in long-life CNI systems appeared first on Electronics Weekly.
TSMC reported Q3 revenues up 41.2% YoY and 17.2% QoQ at $46.72 billion Gross margin for the quarter was 66.4%, operating margin was 58.7%, and net profit margin was 51.1%. […]
The post TSMC has $47bn revenue Q3 appeared first on Electronics Weekly.
The UK Space Agency (UKSA) is backing an Active Debris Removal (ADR) mission to remove two defunct satellites and release them lower into the atmosphere where they will naturally burn […]
The post UK Space Agency backs UK ADR mission for space debris removal appeared first on Electronics Weekly.