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.
CopperPilot’s CEO said the startup has built its AI design agent so that “no hardware team is ever blocked because a board is too hard to design.”
The post CopperPilot Raises Pre-seed to Develop AI Agent for PCB Design appeared first on EE Times.
Quantum computing’s future depends on measuring useful processing power against energy consumption and cost, not just qubit counts.
The post Quantum Computing’s Energy Bill Is Coming, and We Haven’t Priced It In appeared first on EE Times.
Getting the most power from an urban-sited panel requires deep understanding of its surroundings.
The post Using a Single Image to Optimize Urban Solar-Panel Orientation appeared first on EE Times.
Stricter European safety assessment criteria are prompting car companies to replace steering-wheel sensors with consolidated in-cabin systems.
The post Automakers Reconsider In-Cabin Sensing for Euro NCAP Ratings appeared first on EE Times.
From lighter wiring to automated assembly, 48V architectures are reshaping vehicle connectivity and laying the groundwork for next generation mobility.
The post Framing the Shift to 48V appeared first on EE Times.
Canaries in the mine or wobbles in the bubble? Although Jensen remains bullish, Elon is getting bearish. “Debt markets have almost entirely shut off access to money for any company […]
The post Canaries Or Jitters? appeared first on Electronics Weekly.
Electronics Mentoring is launching an initiative to help support mid-career professionals, in terms of career development, with industry colleagues committing to helping others progress. Essentially, the mentoring initiative will connect […]
The post Electronics Mentoring launches to better support mid-career professionals appeared first on Electronics Weekly.
Understanding the error sources in medical device testing is essential for appraising the systems, writes Aditi Jaiswal. Medical device testing imposes accuracy requirements that push conventional bench instrumentation to its […]
The post Improving measurement accuracy in modern medical device testing systems appeared first on Electronics Weekly.
Solstar Space, a space-based communications startup, has successfully demonstrated on-orbit Wi-Fi communications. This was during NASA’s R5-S10 CubeSat proximity operations near the Momentus Vigoride-7 spacecraft. The mission collected images and […]
The post Solstar demonstrates space-to-space Wi-Fi connectivity for Nasa appeared first on Electronics Weekly.
Intel is to buy Classiq, a provider of quantum computing software. The combination of Classiq’s synthesis platform with Intel’s spin-qubit manufacturing and existing software would create a user-friendly full-stack quantum […]
The post Intel buys Classiq to become full-stack quantum computing provider appeared first on Electronics Weekly.