Resistor Color Code Calculator / Decoder

The Resistor Color Code Calculator decodes 4- and 5-band resistors into a resistance value with tolerance, and encodes a value back into band colors. Minimum and maximum values within tolerance are shown alongside the nominal figure.

• Decode and encode modes
• 4-band and 5-band resistors
• Digit, multiplier and tolerance bands
• Nominal, minimum and maximum values
• Full standard color set

1. Choose decode or encode and the band count.
2. Select the band colors, or enter a value to encode.
3. Read the resistance, tolerance and min/max range.

Example: red, violet and a brown multiplier -> 270.00 ohms, with a plus/minus 1% range of 267.30 to 272.70 ohms.

• The tolerance range shows what the part may actually measure
• Encode mode helps when picking a value from stock