Electronics Tool

Decode resistor bands without second-guessing the math.

Switch between 4-band and 5-band resistors, choose the colors, and get the resistance value, multiplier, tolerance, and expected min/max range instantly. Great for breadboard work, repair jobs, and quick learning.

Decoded value

This is the live resistance calculation based on your selected bands.

Resistance 0 Ω Main decoded resistor value.

Tolerance ±5% Tolerance determines the expected measurement range.

Minimum value 0 Ω Lower bound after tolerance is applied.

Maximum value 0 Ω Upper bound after tolerance is applied.

Live resistor preview

Use the visual to sanity-check stripe order before you reach for a meter.

Color reference

Quick lookup for digit and multiplier meanings.

Color	Digit	Multiplier	Tolerance