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PCB Toolkit
PCB Track Width CalculatorPCB Impedance CalculatorDifferential Pair & XTALKPCB Via Calculator
Components
Crystal Load Capacitor CalculatorResistor Color CodeInductor Color CodeSMD Resistor CodeResistor Min/Max CalculatorCapacitor Marking CodeCapacitor Derating CurvesJunction Temperature Calculator
Design
Reactance / Resonance CalculatorLogic Level Compatibility CheckerVoltage DividerPull-up / Pull-downOhm's Law CalculatorLED Resistor CalculatorZener Diode CalculatorSeries / Parallel ResistorsSeries / Parallel CapacitorsRC / RL Filter Calculator555 Timer CalculatorCapacitor ChargeBattery Life CalculatorRTD Measurement LabOperational AmplifierADC/DAC CalculatorBER Confidence Level
Pinout & Connectors

Cable

Cable Voltage DropAWG Wire Size
Documentation
Crystal Load Capacitance Design GuideLogic Level Compatibility Guide: CMOS, TTL & Noise MarginsUnderstanding Reactance and LC/RLC ResonanceUnderstanding Unix Timestamp and Epoch TimeUnix Timestamps in Embedded Systems, APIs and DatabasesMTBF versus Service LifeMicrostrip & Stripline ImpedanceResistivity TableRadio FrequenciesFrequency Tolerance: PPM & HzE-series Resistor ValuesResistor Tolerance & TCRCapacitor Voltage & Temperature DeratingCapacitor Technologies ComparisonSI Prefixes & Engineering NotationIP (Ingress Protection)PCB Copper Thickness & WeightBER Confidence Testing
Calculators
Wavelength CalculatorPPM to Hz CalculatorUnix Timestamp / Epoch Converter

Converters

Decibel ConverterRMS Convertern/p/µ/m/k/M/G ConverterPCB Copper Weight: oz ↔ µm

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Calculators

Calculators

Browse calculators for time, frequency tolerance and wavelength, with practical electronics references.

3tools

Technical guides

Wavelength Calculator: Formula, Examples & LimitsCalculate wavelength and understand propagation speed, velocity factor, antenna fractions, examples, and practical limits.Open toolPPM to Hz Calculator: Frequency Tolerance & PeriodConvert frequency tolerance between ppm and hertz, calculate minimum and maximum frequency, ppb, and the exact period span.Open toolUnix Timestamp / Epoch ConverterConvert Unix timestamps to UTC or local dates and back. Supports seconds, milliseconds, microseconds, nanoseconds and time zones.Open tool