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.
AI-driven high-bandwidth memory demand is reshaping memory markets, boosting mature flash products as Macronix expands its portfolio for AI workloads.
The post AI Reshapes Memory Architecture as Macronix Expands Flash Portfolio appeared first on EE Times.
Semiconductor obsolescence is a design issue. Engineers protect long-life systems with critical-parts planning, authorized sourcing, and early dialogue.
The post Designing for the Long Haul: Building Obsolescence-Resilient Product Lifecycles appeared first on EE Times.
Discover how electronics manufacturers can reduce material shortages by improving inventory accuracy, connecting purchasing to production, and using BOMs.
The post How Small Electronics Manufacturers Prevent Component Shortages appeared first on EE Times.
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.
Toyota and Waymo are to start an autonomous robotaxi service in Japan in 2027, it was announced at the weekend. The service will use the bZ4X EV (pictured). They intend to bring […]
The post Toyota and Waymo to launch robotaxis in Japan appeared first on Electronics Weekly.
ASML CEO Christophe Fouquet (pictured) is linking executive compensation to employee morale. The company selected six key questions from its staff survey designed to assess employee morale to form a […]
The post ASML links exec pay to employee morale appeared first on Electronics Weekly.
Japan’s Defence Ministry will begin research next fiscal year on mass-producing drones for the detection and attack of foreign submarines. Japanese companies will be selected for the development programme in […]
The post Japan to build underwater drones appeared first on Electronics Weekly.
Group14 Technologies, the manufacturer and supplier of advanced silicon battery materials, has closed a €150 million (~$169 million USD) Series D equity extension. As part of the funding, Group14 has […]
The post Group 14 expands into Spain appeared first on Electronics Weekly.
UNI Hall 3 Click from MIKROE is a compact add-on Click board designed for contactless magnetic sensing applications. This board is based on the A31015KEWALT-47SN, a nanopower, ratiometric 1D linear […]
The post Mikroe Click board for south-pole sensing appeared first on Electronics Weekly.