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.
Axelera’s Europa brings 629 TOPS inference to 35W edge systems while Voyager cuts toolchain lock-in.
The post Axelera AI: Data Center Inference Performance in the Power Envelope of Embedded Systems appeared first on EE Times.
Avoid NFC failures: plan ferrite shielding, flexible placement, robust connectors, and chipset validation before prototyping.
The post Solving the Five Hard Problems of NFC Antenna Integration at 13.56 MHz appeared first on EE Times.
Everspin’s demo shows how a 4-GB pool of persistent MRAM can serve as a new tier of storage between DRAM and NAND flash.
The post CXL-Connected MRAM Address AI Storage Latency appeared first on EE Times.
Kepler targets 2027 production for 3D ferroelectric memory promising 5–10× better bandwidth per watt than HBM.
The post Kepler Aims to Launch Energy-Saving Replacement for HBM in 2027 appeared first on EE Times.
See how trusted AI combines intelligence, domain expertise, and deterministic verification to boost confidence in semiconductor design.
The post Trusted AI: Why Intelligence Alone Isn’t Enough appeared first on EE Times.
Microchip Technology and Navitas Semiconductor have partnered to collaborate on an 800V DC-to-6V DC reference design for AI datacentre rack power applications. It combines Microchip’s digital power control and security […]
The post Microchip, Navitas 800V DC-to-6V DC reference design for AI datacentres appeared first on Electronics Weekly.
What a striking video! Apparently it is the work US Robotics company Figure (no, I hadn't heard of them before this video). They wanted to decommission units from its F02 fleet and asked for suggestions.
The post Robots – Cast yourself into a vat of molten steel! appeared first on Electronics Weekly.
The World Intellectual Property Organization (WIPO) has released its 2026 Global Innovation Index (GII). Switzerland tops the rankings once again with a score of 66,7 out of 100. This is […]
The post The 2026 Innovation Index appeared first on Electronics Weekly.
PCTEL is adding Wi-Fi 6/6E coverage testing to its SeeHawk Touch network testing software. The company highlights it allows Wi-Fi technologies (on 2.4, 5, and 6 GHz channels) to be […]
The post PCTEL’s SeeHawk Touch adds Wi-Fi 6/6E coverage testing appeared first on Electronics Weekly.
The UK government is backing the UK Space Landing Pad Programme, which is a six-month pilot to attract and support international space companies looking to establish a commercial presence in […]
The post UK Space Landing Pad Programme launches at UCL appeared first on Electronics Weekly.