Electrical Basics Tools

Free electronics and electrical basics tools — decode 4, 5 and 6 band resistor colour codes, find bands for a value, and check E-series preferred values.

2 tools

Resistor Color Code

Pick 4, 5 or 6 band colours to read a resistor's value, tolerance and range, or type 4.7k or 4k7 to get its bands, with E12, E24 and E96 checks.

Also in Electrical Basics

Tools from other categories tagged with Electrical Basics

3-Phase Power

Convert three-phase kW, kVA or motor hp to line current, or amps back to power, with power factor, kVAR and star or delta phase voltage and current.

Why These Tools

Brown, black, orange: ten thousand ohms, if you remember the order. Resistor Color Code Calculator reads 4, 5 and 6 band resistors from clicked colours, works backwards from a value such as 4k7 to the paint, and says whether the result is a standard E12, E24 or E96 part.

3-Phase Power Calculator is listed here too, because converting kilowatts to amps is the first sum most people meet on a real supply. Ohm's law, LED resistors, capacitor codes and wire sizing are planned next.

Electrical Basics Tools