Inductor Color Code Calculator

About this tool

Decode the 4-band color code printed on an axial inductor into its inductance value, using the same digit/multiplier/tolerance color scheme as resistors, but read out in microhenries (µH) instead of ohms.

Frequently asked questions

Do inductors use the same colors as resistors?

Yes — the same 4-band scheme (two significant digits, a multiplier, and a tolerance) with the same color-to-number mapping, just interpreted as microhenries instead of ohms.

How do I know if I'm reading a resistor or an inductor?

Inductors are usually a bit larger, often have a visibly wound coil under a coating, and are commonly a solid color (like green or blue) rather than the tan/beige body typical of resistors — check the component's datasheet or context if unsure.

What if my inductor has 5 or 6 bands?

Some inductors add a temperature coefficient or extra precision band; this tool covers the standard 4-band case, which covers the vast majority of through-hole inductors.