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.
Agents present a bursty workload, leaving CPUs frequently idle, which is placing new demands on CPU infrastructure.
The post Google: Agentic AI Will Drive New Demands on Data Center CPUs appeared first on EE Times.
Intel faces a tough challenge as manufacturing bottlenecks and rising memory costs impact PC sales despite strong data center growth.
The post Intel’s Q3 Results Show Supply Chain Disruptions and PC Plunge appeared first on EE Times.
As components shrink to 01005 scale and board densities rise, BGA rework requires more precise heat control.
The post Why Shrinking Component Geometries Force a Rethink of BGA Rework Heating Methods appeared first on EE Times.
Explore Infineon’s OktoberTech takeaways on edge AI, SDVs, GaN power, and the shift toward 800 V DC data centers.
The post Infineon’s OktoberTech: Edge AI, SDVs, and the Road to 800 VDC appeared first on EE Times.
Samsung reported third-quarter operating profit of $80 billion, but rising component prices caused an operating loss in mobile.
The post Samsung Electronics Posts $80B Operating Profit on AI Memory Demand appeared first on EE Times.
Siglent’s new microwave signal generators, the SSG6M80A series, feature phase-coherent signal generation with two or four channels up to 20 GHz. The company highlights that the requirements placed on RF […]
The post Siglent SSG6M80A expands microwave signal generation for up to 20 GHz appeared first on Electronics Weekly.
Ukraine’s HIMERA – a defence startup – and Denmark’s GomSpace – which manufactures satellites – have announced the launch of OBRIA NANO. This is the first test satellite for an […]
The post GomSpace launches OBRIA NANO for Ukrainian satcoms appeared first on Electronics Weekly.
in 1998 the eBook was emerging to meet with considerable scepticism. In October 1998 EW carried this account of the debate. ‘At a recent eBook conference in the US, […]
The post Can eBooks survive? appeared first on Electronics Weekly.
Thales Alenia Space has been awarded a contract to add two additional satellites dedicated to the Galileo Second Generation constellation. It will be part of the on-going contract with the […]
The post Thales Alenia Space wins contract for two further Galileo satellites appeared first on Electronics Weekly.
BEAMA has launched a new group for UK companies delivering power grid infrastructure, including those working in civil engineering, construction, design, specification and wider services. The Electricity Networks Infrastructure (ENI) […]
The post BEAMA sets up power grid group appeared first on Electronics Weekly.