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.
See how Synopsys uses agentic AI to orchestrate trusted EDA tools for precise, explainable chip design, and faster engineering workflows.
The post Can AI Be Trusted? Synopsys on Agentic AI and Autonomous Engineering appeared first on EE Times.
Gopi Sirineni says AI’s bottleneck is power, not chips, and autonomous rack controllers can boost efficiency up to 30%.
The post Why AI’s Limit Is Power, Not Chips: Gopi Sirineni at AI Infra Summit 2026 appeared first on EE Times.
For AMD CTO Mark Papermaster, tailored computing and holistic design are key to delivering AI.
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Join this session where our expert will examine key power technologies, design considerations, and best practices that help manufacturers enhance product quality, accelerate qualification, and reduce risk.
The post Engineering Reliability: Power Architectures for High-Performance Burn-In appeared first on EE Times.
Data centers have become essential to almost every part of the global economy with the continuing rise in computing demands. Modern data centers, consisting of rows of equipment racks for storing, processing, and sharing data, require front-end AC/DC converters that are reliable, operate at unity power factor, offer low input current THD, and achieve high […]
The post Enhance Power Quality with a GaN-based AC/DC Three-Level Vienna Rectifier appeared first on EE Times.
Let our content come straight to you! Easily digestible newsletter emails straight to your inbox. And all the newsletters are mobile optimised.
The post Get Mannerisms, Gadget Master, the Daily and the Weekly, in newsletter form appeared first on Electronics Weekly.
The Teradyne Magnum E2 is a high-speed memory test system for advanced DRAM and flash interfaces. Its design, says the company, matches the test demands driven by AI and high-performance […]
The post Teradyne Magnum E2 addresses advanced DRAM and high-speed NAND flash appeared first on Electronics Weekly.
Queen’s University has officially opened the Advanced Manufacturing Innovation Centre (AMIC), a £100m investment through the Belfast Region City Deal to support innovation and growth for manufacturing in Northern Ireland. […]
The post Queen’s University opens Advanced Manufacturing Innovation Centre appeared first on Electronics Weekly.
There’s a chance that the de-frothing of the AI market could be an orderly retreat rather than a sudden bust. Anthropic’s two largest customers are weaning themselves off Anthropic products […]
The post An Orderly De-Frothing? appeared first on Electronics Weekly.
Omron is introducing its R1 (3G3R1) variable speed drive as the most powerful member of its inverter family, for demanding, high-power applications. For example in pump sequencing, solar pumping entrance […]
The post Omron R1 inverter drives into high-power applications appeared first on Electronics Weekly.