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Electronics Engineering Calculators

Accurate calculators for resistor, capacitor, LED, semiconductor and PCB design.

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Engineering Platform

Calculators
220

Available engineering tools

Component Categories
22

Calculator groups and roadmap areas

Engineering Guides
124

Published technical guides

Reference Data
59

Published reference pages

Popular Calculators

High-frequency tools for component selection, board checks, RF planning and power budgets.

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Ohm's Law CalculatorResistorsCalculate voltage, current, resistance, and power from any two known values in a DC circuit.Open Calculator ->Voltage Divider CalculatorResistorsCalculate divider output voltage, reverse-solve R1 or R2, and check divider current and resistor power.Open Calculator ->LED Resistor CalculatorResistorsCalculate LED current-limiting resistance, the next higher E24 value, power rating, and total circuit current.Open Calculator ->RC Time Constant CalculatorCapacitorsCalculate RC time constant, charge and discharge timing, and reference voltages from resistance and capacitance.Open Calculator ->Capacitive Reactance CalculatorCapacitorsCalculate capacitive reactance and angular frequency from capacitance and AC frequency with engineering unit conversion.Open Calculator ->LC Resonance CalculatorInductorsCalculate LC resonant frequency and angular frequency, or solve inductance or capacitance for a target frequency.Open Calculator ->LED Current CalculatorLEDsCalculate LED operating current, resistor voltage drop, resistor power, LED power, and total circuit power.Open Calculator ->Non-Inverting Op-Amp Gain CalculatorOperational AmplifiersCalculate ideal non-inverting op-amp closed-loop gain from feedback and ground resistor values, including gain in V/V and dB.Open Calculator ->Battery Life CalculatorBatteriesCalculate battery life, required battery capacity, and average current from duty cycle with mAh, Ah, current, runtime, and efficiency inputs.Open Calculator ->RF Wavelength CalculatorRFCalculate RF wavelength, frequency, propagation velocity, velocity factor, quarter-wave length, and half-wave length for air, coax, transmission lines, fiber context, and custom media.Open Calculator ->RF Link Budget CalculatorRFCalculate RF link budget received power, EIRP, antenna gains, path loss, receiver sensitivity, required transmit power, maximum allowable path loss, and link margin.Open Calculator ->UART Baud Rate CalculatorCommunicationCalculate UART baud rate timing, bit time, character time, frame bits, transmission time, data rate and character rate for serial communication.Open Calculator ->

Component Categories

Browse the calculator library as an engineering index. Counts are generated from the active calculator registry.

Components

4 groups
ResistorsTools for resistance, voltage scaling, current limiting, resistor networks, and power checks.6 calculatorsCapacitorsRC timing, reactance, filtering, stored energy, and capacitor selection support.6 calculatorsInductorsInductance, LC resonance, stored energy, converter magnetics, and EMI filter tools.5 calculatorsLEDsLED current limiting, indicator circuits, LED arrays, strips, and power estimation.12 calculators

Semiconductors

4 groups
DiodesDesign aids for zener regulation, rectifiers, diode drops, clamping, and protection circuits.6 calculatorsTransistorsTransistor calculators for BJT switching, gain, bias design, saturation, power dissipation, and amplifier analysis.10 calculatorsMOSFETsSwitching device tools for conduction loss, gate drive, load switches, and thermal design.10 calculatorsOperational AmplifiersOp amp tools for gain, feedback, filters, signal conditioning, and analog applications.12 calculators

Board, Power and RF

4 groups
PCBBoard-level calculators for trace design, copper thickness, via current, and thermal constraints.10 calculatorsPowerPower electronics tools for regulators, converters, thermal margins, and component stress.10 calculatorsBatteriesBattery tools for capacity, runtime, charging, pack configuration, and energy budgeting.10 calculatorsRFRF tools for wavelength, impedance, antennas, RF power, matching, and wireless engineering.12 calculators

Interfaces and Converters

10 groups
CommunicationCommunication tools for UART, I2C, SPI, CAN, RS-485, throughput, latency, and embedded interfaces.12 calculatorsConvertersEngineering unit converters for RF power, wire gauge, numeric formats, and design workflows.4 calculatorsDigital LogicDigital electronics tools for logic, binary systems, coding, checksums, and timing.12 calculatorsFiltersFilter tools for cutoff frequency, bandwidth, resonance, passive filters, and active filters.12 calculators

Engineering Reference / Data

Reference pages and shared engineering datasets support calculators with traceable values, units and component conventions.

Engineering ReferenceLookup tables for component markings, preferred values and reusable engineering data.Component DataShared resistor and capacitor reference pages backed by structured engineering data.Standards NotesIEC preferred values, color codes, tolerance data and practical reference tables.Technical GuidesDesign-focused explanations linked to calculators and component topics.

Engineering Guides

Practical explanations that connect calculator inputs, formulas, component choices and common design mistakes.

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Communication

Measuring Network Goodput and Latency: Payload, Clocks, and Tail Delay

Measure unique delivered payload and response delay with defined intervals, synchronized clocks, loss, and tail-latency reporting.

10 min / Intermediate

MOSFETs

MOSFET Double-Pulse Testing: Measuring Switching Energy and Loss

Measure Eon and Eoff with aligned voltage and current probes, controlled double pulses, and documented operating conditions.

11 min / Advanced

Batteries

Measuring Battery Capacity: Coulomb Counting, Offset, and Cutoff

Measure delivered Ah and coulombs from current samples while controlling offset, timing, discharge cutoff, and test conditions.

10 min / Intermediate

Sensors

Strain Gauge Installation: Bonding, Lead Compensation, Thermal Drift, and Shunt Checks

Validate bonded strain gauges through surface preparation, arm wiring, lead and thermal compensation, shunt checks, and mechanical proof.

10 min / Intermediate

Motors

Stepper Pulse Scheduling: Acceleration, Microstepping, Timing, and Missed Steps

Translate stepper speed and microstep targets into driver-safe pulses, acceleration ramps, torque checks, and verified motion.

10 min / Intermediate

Oscillators

Measuring Oscillator Frequency: Counter Timebase, Loading, Drift, and PPM

Measure oscillator frequency with a verified counter reference, gate method, probe loading, temperature sweep, and uncertainty ledger.

10 min / Intermediate