Electronics & cabling

Calculators and references for cables, connectors, signals and circuits, with the formulas and the standards behind each result.

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Battery sizesEvery common battery size, from AAA to D, 9 V, CR2032 and LR44 button cells to 18650: dimensions, voltage, IEC names and equivalents., private, runs on your deviceReferenceLength
Drone flight timeFlight time from the battery’s mAh and voltage or Wh and the average draw, with a landing reserve and the energy in Wh., private, runs on your deviceAviationCalculatorFlyingEnergy
E-series preferred valuesFind the nearest E3 to E192 value to the one you need, with its neighbours and error., private, runs on your deviceCalculator
Logic gatesSwitch the inputs and see each logic gate's output at once, with its symbol in both standard styles, its Boolean expression and truth table., private, runs on your deviceReferenceEncoding
Ohm's law calculatorGive any two of voltage, current, resistance and power to get the other two., private, runs on your devicePhysicsCalculator
Resistor colour code calculatorTurn 4, 5 or 6 colour bands into ohms and tolerance, or find the bands of a value., private, runs on your devicePhysicsCalculator
Series and parallel calculatorCombine 2 to 12 resistors or capacitors and see the equivalent value., private, runs on your devicePhysicsCalculator
Wire gauge converterConvert AWG to mm², kcmil and diameter, with the copper resistance per kilometre., private, runs on your deviceUnit conversionConverter

Electronics tools use standard values and formulas, and say which standard or table each result comes from.

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