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.
Arm's Ami Badani cites the $2 nominal damages award as validation, while chip design experts point to open architectures such as RISC-V as the long-term alternative for AI workload flexibility.
The post Arm Comments on Jury Decision in Qualcomm Trial appeared first on EE Times.
The $2 damages award grabbed headlines, but the Arm-Qualcomm verdict’s bigger implication concerns who controls the compliance tests that custom chips must pass before shipping.
The post Two Dollars and a Test Suite appeared first on EE Times.
See how BIWIN’s SSD, embedded storage, and memory portfolio supports faster, efficient AI from cloud data centers to edge wearables.
The post From Cloud AI to Edge AI: How BIWIN Enables the Next Generation of Storage and Memory Solutions appeared first on EE Times.
Deepx is combining low-power AI accelerators and portable software with industry partnerships to bring physical AI into production.
The post Deepx Building Open Software Ecosystem to Scale Physical AI Beyond the Data Center appeared first on EE Times.
Explore Goodram’s European approach to DRAM and SSD testing, from burn-in to platform validation, for reliable industrial and embedded systems.
The post How Goodram Validates DRAM and SSD Reliability in Europe appeared first on EE Times.
The government is to invest £100 million in an AI Biosecurity Lab (AIBL) to counter biological risks posed by AI. Anthropic and OpenAI will contribute £200 million in compute and model […]
The post Government to set up Biosecurity Lab for biological AI threats appeared first on Electronics Weekly.
Northwestern University physicists have trapped a particle of anti-matter in a cage (pictured) and are preparing to take measurements of its properties and compare them with the properties of matter. […]
The post Anti-matter particle trapped in Illinois cage appeared first on Electronics Weekly.
Atomera, a semiconductor transistor materials and technology licensing company, has entered into a Joint Development Agreement (JDA) with IQE to bring high-performance, cost-effective RF GaN to market. The collaboration leverages […]
The post Atomera and IQE hook up to advance RF GaN appeared first on Electronics Weekly.
Lab-grown skeletal muscle tissue can contract, but the movement is often so slight that it is barely visible. This poses a problem for biohybrid robots designed to move using living […]
The post Lab-grown muscles power robots appeared first on Electronics Weekly.
Server CPU shipments are projected to increase 31% YoY in 2026. In 2027, continued growth in AI inference demand and rising adoption of agentic AI services are expected to drive […]
The post Server CPUs to grow 30% in 2026 and 40% in 2027 appeared first on Electronics Weekly.