Bench tool

Resistor Toolkit

Decode a color-banded resistor, or work backward from a target value to the bands you need.

Install on your phone This tool is also available as a mobile app — full offline access, right from your home screen, no browser tab required. Get the Resistor Toolkit app

Color Code Decoder

Pick a band count, then click through the swatches to match the resistor in your hand. The reading updates live.

1.0 kΩ

Tolerance: ±5% Range: 950 Ω – 1.05 kΩ

Reading order: on a real resistor, tolerance (and tempco, if present) sits nearer one end with a visible gap before it — that's your cue for which direction to read the digits in. No tolerance band traditionally means ±20%.

Reverse Lookup

Enter the value you need and get the band colors back — handy when you're marking up a schematic or hunting through a parts drawer.

Target value

Band count

Tolerance

This value is outside the standard multiplier range for that band count.

4.70 kΩ

Brown · Violet · Red · Gold