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.
Physical AI will be limited in the real world if we keep pretending that physical data comes packaged like the digital world.
The post Physical AI Needs a Neuromorphic Path from Sensor to Silicon appeared first on EE Times.
Join this webinar, where our expert will explore the technology behind the ADMT4000 and how its ability to track multiple rotations and angular movement without power is transforming the design of both linear and rotary actuators.
The post Worlds First Single Chip Multiturn Position Sensor in Smaller Form Factor appeared first on EE Times.
Join us to discover how Siemens Innovator3D IC streamlines 3D IC design from planning to implementation!
The post Scaling 3D IC design: Trends, Challenges and Practical Workflows appeared first on EE Times.
Custom silicon lets AI data centers cut power, latency and data movement while improving economics at scale.
The post Why Custom Silicon Matters in AI Data Centers appeared first on EE Times.
Nuremberg / Munich, Germany, 2026 — SCHIEDERWERK GmbH, a specialist in custom power electronics solutions engineered and manufactured in Germany, will showcase its latest platform-based power supplies and innovative power management solutions for mobile, medical, and industrial applications at electronica 2026 (Hall A5, Booth 318), where reliability is a critical requirement. The company’s exhibition highlights […]
The post SCHIEDERWERK Showcases Novel Power Supply Solutions for Mission-Critical Applications at electronica 2026 appeared first on EE Times.
Diodes has announced its family of field-plated Super Barrier Rectifier (SBRFP) products that are automotive-compliant (AEC-Q101). The family comprises the 2A SBRFP2M60P1Q and SBRFP2M60SAFQ, the 3A SBRFP3M60SAFQ, and the 8A […]
The post Automotive SBRFP devices feature avalanche energy ratings up to 145mJ appeared first on Electronics Weekly.
The most popular articles on the site cover an obituary for Professor Cyril Hilsum, a report predicting market growth for the robotaxi, and the chairman of Hynix selling shares worth $700m, Plus there's also Qualcomm and Arm resuming their legal marathon, two separate days of which feature...
The post Most Read – Robotaxi growth, Arm Qualcomm battle appeared first on Electronics Weekly.
Today, the Arm vs Qualcomm legal case in Delaware concludes and the judge and jury should give their rulings. Yesterday, Day 4 of the case, started with testimony from Manju […]
The post Qualcomm vs Arm (Day 4) appeared first on Electronics Weekly.
ASML has begun a ten year programme to get feature sizes down to 5nm from the 8nm which high NA tools can deliver. The 5nm litho tool is dubbed Hyper […]
The post ASML starts on Hyper NA EUV appeared first on Electronics Weekly.
TSMC had September revenue of $16.1 billion, a decrease of 0.6% from August 2026 and an increase of 54.6% from September 2025. Revenue for January through September 2026 totalled $122 billion, an increase of 41.1% compared […]
The post TSMC September revenue up 54% YoY appeared first on Electronics Weekly.