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.
Custom silicon lets AI data centers cut power, latency and data movement while improving economics at scale.
The post Why Custom Silicon Matters in AI Data Centers appeared first on EE Times.
Nuremberg / Munich, Germany, 2026 — SCHIEDERWERK GmbH, a specialist in custom power electronics solutions engineered and manufactured in Germany, will showcase its latest platform-based power supplies and innovative power management solutions for mobile, medical, and industrial applications at electronica 2026 (Hall A5, Booth 318), where reliability is a critical requirement. The company’s exhibition highlights […]
The post SCHIEDERWERK Showcases Novel Power Supply Solutions for Mission-Critical Applications at electronica 2026 appeared first on EE Times.
This technical guide provides a practical framework for migrating machine learning models and applications from an NVIDIA/CUDA-based environment to the SiMa.ai Physical AI platform. It explains the key differences between the two deployment workflows, outlines the model and application migration processes, and identifies the technical considerations to address before deployment. You’ll learn how to: Inside […]
The post NVIDIA Jetson to SiMa.ai Modalix MLSoC Migration Guide appeared first on EE Times.
Rising semiconductor costs and computing requirements drive automakers toward modular ADAS AI solutions.
The post Rising Costs, Compute Demand Push ADAS Toward Modular AI appeared first on EE Times.
Register now for our webinar to discover how Navitas 2.0 is revolutionizing AI infrastructure power delivery.
The post Breaking the AI Infrastructure Power Wall: From Grid to xPU appeared first on EE Times.
Universal Quantum, the UK and German quantum computing startup, has secured $100 million in Series A funding. The company notes it is the largest Series A ever raised by a […]
The post Universal Quantum raises $100m for trapped-ion quantum computing appeared first on Electronics Weekly.
Powell Electronics is supplying a low-force 15-pin connector pair from Planetary Systems for signal transfers in spaceflight applications. The pair – 4000106C for the lower separation connector and 4000107C for […]
The post Powell supplies low-force 15-pin connectors from Planetary Systems appeared first on Electronics Weekly.
There was once a sprawling corporate which was bleeding to death. It lost $5.7 billion one year on top of the $3.1 billion it had lost the previous year. Then a […]
The post Fable: The Guy Who Focussed appeared first on Electronics Weekly.
Check out the launch of Google's Project Suncatcher prototype datacentre satellite, with its Trillium TPUs (Tensor Processing Units). It's courtesy of SpaceX's Transporter-18 rideshare mission.
The post Pic of the Day: Google’s Project Suncatcher datacentre satellite in orbit appeared first on Electronics Weekly.
As the communications network moves into the millimetre-wave spectrum connectivity becomes a larger challenge, writes Dr Tudor Williams. As satellite constellations expand 5G infrastructure becomes more densely deployed and defence […]
The post Connectivity challenges evolve as systems move into higher-frequency operation appeared first on Electronics Weekly.