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.
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As AI pushes chip packages beyond traditional wafer limits, panel-level processing is emerging as a critical path to scale advanced packaging.
The post The AI Packaging Challenge: 5 Reasons Panels Are Gaining Momentum appeared first on EE Times.
Solstar Space, a space-based communications startup, has successfully demonstrated on-orbit Wi-Fi communications. This was during NASA’s R5-S10 CubeSat proximity operations near the Momentus Vigoride-7 spacecraft. The mission collected images and […]
The post Solstar demonstrates space-to-space Wi-Fi connectivity for Nasa appeared first on Electronics Weekly.
Intel is to buy Classiq, a provider of quantum computing software. The combination of Classiq’s synthesis platform with Intel’s spin-qubit manufacturing and existing software would create a user-friendly full-stack quantum […]
The post Intel buys Classiq to become full-stack quantum computing provider appeared first on Electronics Weekly.
Cadence has announced the Maestro AI Model Portfolio, which powers Cadence AI Super Agents across semiconductor and system design workflows. By integrating these models with reinforcement learning (RL) loops and […]
The post Cadence Maestro powers agents appeared first on Electronics Weekly.
Anglia Components has signed a Pan-European franchise agreement with NOVOSENSE Microelectronics, the Chinese manufacturer of analogue and mixed signal ICs. Explains John Bowman, Anglia’s Marketing Director: “This agreement is part […]
The post Anglia signs Novosense appeared first on Electronics Weekly.
Tracxn Technologies has released the Europe Tech – 9M 2026 Report, covering funding, investors, exits, unicorns and city-level activity across Europe’s tech industry from Jan 1, 2026 to Sep 30, […]
The post European tech companies raise $62bn so far this year appeared first on Electronics Weekly.