Calculators
Electronics Calculators
Components, circuits, op amps, 555 timers, power supplies, PCB design and digital conversions. Every tool shows the formula, a worked example and the standard it is based on.
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All Electronics Tools
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Components6
ComponentsSMD Resistor Code Calculator3 digit (472), 4 digit (1002)ComponentsCapacitor Code Calculator3 digit code, Tolerance letterComponentsStandard Resistor Values Calculator (E Series)E6 and E12, E24 (5 %)ComponentsInductors in Series and Parallel CalculatorSeries, ParallelComponentsAir Core Coil Inductance CalculatorWheeler formula, Single layer coilComponentsResistor Power Rating CalculatorP = V²/R, P = I²R
Circuits6
CircuitsCurrent Divider CalculatorTwo or three branches, Branch currentCircuitsWheatstone Bridge CalculatorBalance condition, Output voltageCircuitsRC and RL Filter Cutoff Frequency CalculatorLow pass, High passCircuitsRLC Circuit Impedance CalculatorSeries RLC, Parallel RLCCircuitsLED Series and Parallel Array CalculatorLEDs per string, String resistorCircuitsTransistor Base Resistor CalculatorBJT switch, Saturation
Op Amp6
Op AmpInverting Op Amp Amplifier CalculatorGain = −Rf/Rin, Output voltageOp AmpNon Inverting Op Amp Amplifier CalculatorGain = 1 + Rf/Rg, Output voltageOp AmpOp Amp Differential Amplifier CalculatorVout = (R2/R1)(V2 − V1), Four resistorsOp AmpOp Amp Summing Amplifier CalculatorOp amp adder, Weighted sumOp AmpInstrumentation Amplifier Gain Resistor CalculatorAD620, AD8221, INA128, INA333Op AmpOp Amp Gain Bandwidth and Slew Rate CalculatorGBW ÷ gain, Slew rate
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Timers and Oscillators5
Timers and Oscillators555 Timer Astable CalculatorFrequency, Duty cycleTimers and Oscillators555 Timer Monostable Calculatort = 1.1 RC, One shotTimers and OscillatorsCrystal Load Capacitor CalculatorC1 = C2, Load capacitanceTimers and OscillatorsFrequency to Period CalculatorHz to seconds, Period to HzTimers and OscillatorsPWM Duty Cycle CalculatorDuty cycle %, Average voltage
Power Electronics7
Power ElectronicsLM317 Voltage Regulator CalculatorVout = 1.25(1 + R2/R1), R2 for targetPower ElectronicsZener Diode Series Resistor CalculatorSeries resistor, Zener powerPower ElectronicsLinear Regulator Power Dissipation CalculatorPower dissipation, Junction temperaturePower ElectronicsHeat Sink Thermal Resistance CalculatorθSA in °C/W, Junction temperaturePower ElectronicsBuck Converter CalculatorDuty cycle, Inductor valuePower ElectronicsBoost Converter CalculatorDuty cycle, Inductor valuePower ElectronicsRectifier Filter Capacitor CalculatorSmoothing capacitor, Ripple voltage
PCB and Digital5
PCB and DigitalPCB Trace Width Calculator (IPC 2221)IPC 2221, External and internalPCB and DigitalPCB Trace Resistance CalculatorCopper resistance, Voltage dropPCB and DigitalBinary, Decimal, Hex and Octal ConverterBinary, HexadecimalPCB and DigitalBattery Life Calculator for Electronic DevicesmAh capacity, Sleep currentPCB and DigitaldBm to Watts CalculatordBm to mW, Watts to dBm
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Related Calculators12
Related CalculatorsResistor Color Code Calculator4 band, 5 bandRelated CalculatorsLED Resistor CalculatorSingle LEDRelated CalculatorsVoltage Divider CalculatorOutput and resistor valuesRelated CalculatorsResistors in Series and ParallelTotal resistanceRelated CalculatorsOhm's Law CalculatorV, I, R and PRelated CalculatorsRC Time Constant CalculatorCharge and dischargeRelated CalculatorsReactance CalculatorXL and XCRelated CalculatorsLC Resonant Frequency CalculatorTank circuitsRelated CalculatorsCapacitors in Series and ParallelTotal capacitanceRelated CalculatorsCapacitor Energy CalculatorJoules and chargeRelated CalculatorsDecibel CalculatorPower and voltage ratiosRelated CalculatorsADC Resolution CalculatorBits and LSB size
Frequently Asked Questions
Are these electronics calculators free?
Yes. All calculators on instrumentationblog.in are free, run in your browser and need no sign up.
How accurate are the electronics calculators?
Each tool follows the published standard or textbook equation for its topic, shows the formula and the calculation steps, and has been checked against worked examples. Always confirm critical designs against the relevant standard and manufacturer data.
More Calculator Categories
26 live toolsTemperature MeasurementThermocouples, RTDs, thermistors, heat transfer, humidity and sensor response.13 live toolsInstrumentation SignalAnalog signal scaling, square root extraction and loop design.12 live toolsPLC Digital SignalRaw count scaling, ADC resolution and number formats for PLC work.30 live toolsFlow MeasurementDP meters, open channel flow, gas conversions, pressure drop and meter sizing.24 live toolsLevel MeasurementDP, radar, ultrasonic and displacer level, plus tank volume for every shape.24 live toolsPressure MeasurementGauges, transmitters, remote seals, piping design, water hammer and compressed air.17 live toolsControl ValveCv sizing, authority, cavitation, actuator thrust, leakage and split range.16 live toolsCalibrationCalibration error, uncertainty, hysteresis, linearity, guard bands and TUR.16 live toolsSafety and SILFunctional safety, reliability and hazardous area calculations.18 live toolsAnalyticalpH, conductivity, dissolved oxygen, humidity and solution chemistry.37 live toolsElectricalPower, cables and protection, motors, transformers, circuits, backup power, lighting and earthing.76 convertersUnit ConvertersPressure, flow, temperature, electrical and more.
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