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.
Why specialized wireless devices and SDR software IP matter to the next wave of intelligent machines
The post Connecting AI to the Physical World appeared first on EE Times.
At Gartner IT Symposium/Xpo 2026, philosopher Yuval Noah Harari makes an appeal to delay artificial superintelligence as it threatens to erode human agency and democratic sovereignty.
The post Harari Warns Tech Leaders Against Pursuing AI Superintelligence appeared first on EE Times.
Explore the road to Level 4 autonomy as experts tackle safety, AI, regulation, and trust—watch the Automotive Tech Forum panel.
The post Automotive Tech Forum: Panel Discussion the Make-or-Break Milestones Toward Level 4 Autonomous Driving appeared first on EE Times.
Explore how 800V SiC MOSFETs boost EV range, charging, and performance—and see what next-gen designs make possible.
The post Automotive Tech Forum: The Current State of Sic in EV Design and How It’s Evolving appeared first on EE Times.
This keynote explores how LiDAR is shaping the future of mobility by improving safety, reliability, and performance in autonomous systems.
The post Automotive Tech Forum: Lidar is Key to Safer ADAS and Autonomous Vehicles appeared first on EE Times.
Don’t miss the Electronics Weekly roundup of all our latest news from Electronica, the bi-annual event running from 10-13 November in Munich. Electronica is the world’s biggest electronics show, and Electronics […]
The post Electronica – The latest news roundup appeared first on Electronics Weekly.
Tektronix chose electronica to launch of the 1 Series digital phosphor oscilloscope (DPO), aimed at students and educators. Models have two or four analogue channels, 12bit vertical resolution, up to […]
The post Electronica: DPO for students offers remote view for educators appeared first on Electronics Weekly.
Ron Neale, who died yesterday, was an electronics engineer, researcher, inventor and editor. He was best known for his long career in solid-state memory technology, especially phase-change memory (PCM). After […]
The post Ron Neale appeared first on Electronics Weekly.
The Nvidia board is meeting today to decide if CEO Jensen Huang should be replaced and, if so, by who. Leading candidates are vice-president for hyperscale and HPC Ian Buck […]
The post Jensen Huang’s fate may be decided today appeared first on Electronics Weekly.
Tria Technologies’ OSM-SB-EP5 is a carrier board for the evaluation, validation and prototyping of OSM-based embedded systems. It is intended for teams building embedded products around the Open Standard Module […]
The post Electronica: Tria’s OSM-SB-EP5 aims to shorten concept-to-product time appeared first on Electronics Weekly.