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.
GPS jamming is rising. Learn how 4G, 5G, and NTN positioning give mission-critical devices a trusted fallback when GNSS fails.
The post When GPS Isn’t Enough: Building a Second Layer of Positioning appeared first on EE Times.
NI said Kaynes Semicon has selected its semiconductor test systems, while other Indian OSATs continue to evaluate equipment as manufacturers prepare for production.
The post India’s OSAT Buildout Puts Semiconductor Testing in Focus appeared first on EE Times.
Demand for custom silicon is rising as physical AI, data centers, automotive systems, and edge devices require architectures optimized for specific workloads, memory bandwidth, latency, and energy efficiency. Delivering these designs requires teams to coordinate heterogeneous compute blocks, complex interconnects, and multiple domains while closing increasingly demanding power, performance, and area (PPA) targets. AI offers […]
The post Why Chip Design AI Benchmarks Must Go Beyond Functional Correctness appeared first on EE Times.
A new MCU combines AI-native acceleration with integrated high-bandwidth DRAM scalable to hundreds of megabytes.
The post Edge AI MCU Features Multimodal Compute, Tiered Memory appeared first on EE Times.
A company on Canada’s east coast is pushing acoustic telemetry toward lighter payloads and decade-scale deployments by treating energy, sensing, and animal welfare as a single systems problem.
The post Innovasea Packs Long-Life Electronics into Fish Tags appeared first on EE Times.
Toyota is to enter a hydrogen-powered truck (pictured with driver Dania Akeel) in the January 2027 Dakar Rally. The truck is a hydrogen fuel cell version of the ICE Hilux […]
The post Hydrogen truck for Dakar Rally appeared first on Electronics Weekly.
Flapping Airplanes, a one year-old San Francisco AI neolab, has raised $1 billion at a $6 billion valuation before it has put a product on the market. ‘Neolab’ denotes an […]
The post Flapping Airplanes raises $1bn appeared first on Electronics Weekly.
Photon Bridge, the Dutch photonics specialist, has raised €10 million to tackle an emerging bottleneck in AI infrastructure: producing the millions of lasers that will be needed to connect increasingly […]
The post Photon Bridge raises €10m appeared first on Electronics Weekly.
The global smartphone market shrank 22.0% YoY to 255.3 million, according to IDC., Shipments marking the highest YoY decline to date of any quarter.. “The sharp downturn the industry has […]
The post Q3 phone market sinks 22% YoY appeared first on Electronics Weekly.
Private Wireless Radio Access Network (RAN) revenue growth slowed to the mid-single digits in H1, reports Dell’Oro. Wide-area private wireless networks are increasingly supporting market growth, driven by opportunities in […]
The post Private wireless RAN revenue growth slows appeared first on Electronics Weekly.