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.
The trillion-dollar semiconductor industry is ready to adapt and expand its fab infrastructure for the AI wave.
The post SEMICON West 2026 Displays AI-Era Chipmaking, Workforce Development appeared first on EE Times.
The OCP Summit showcased power delivery boards, PSU designs, hot-swap controllers, and event-based telemetry.
The post Data Center Power a Prominent Highlight of OCP 2026 appeared first on EE Times.
AMD’s David Wang told EE Times that while Taiwan has huge opportunities in rack-scale AI, physical AI, and AI PC markets, the sticking point may well be talent.
The post Taiwan’s AI Ambitions Run into Talent Gap appeared first on EE Times.
Join this 30-Minute BitCast as our expert demonstrates how information flow tracking follows security-sensitive assets during existing simulation or emulation runs.
The post Your Chip Works. Prove It Is Secure. appeared first on EE Times.
During a panel session at iTechCon 2026, discussions explored how Taiwan can build on its strengths in semiconductors, advanced packaging, and system design to support AI development.
The post AI Moves to System-Level Co-Design: How Can Taiwan Capture More Value appeared first on EE Times.
Microchip is expanding its space power Portfolio with the POL-05-20S, a radiation-tolerant GaN point-of-load converter that delivers up to 20A of output current. Measuring 1.51” x 1.51” x 0.45” in […]
The post Microchip POL-05-20S is radiation-tolerant GaN point-of-load converter appeared first on Electronics Weekly.
The latest installment of the Arm vs Qualcomm case, the weirdness of the current semiconductor market, and an active debris removal mission to launch from Scotland mission...
The post What caught your eye? Arm vs Qualcomm, AI boom, ADR mission appeared first on Electronics Weekly.
Mandy is known for other things now but 28 years ago he was a revolutionary, as this EW yarn in September 1998 chronicled: ‘The first major speech as cabinet minister […]
The post When Mandy Became A Revolutionary appeared first on Electronics Weekly.
From our sister title, AV Magazine: A new partnership with AUDIOropa will allow the UK-based CUK Group to provide integrators with solutions that deliver more-inclusive audio experiences across public and […]
The post A/V: CUK Group adds Auracast assistive listening technology to portfolio appeared first on Electronics Weekly.
Rhode & Scharwz has added the SAM200 system amplifier to its SAM portfolio. This model extends the bandwidth of the earlier SAM100 model with a capability of 20GHz-53GHz with up […]
The post R&S extends amplifier range for satellite use appeared first on Electronics Weekly.