Resistor & SMD Decoder
Decode color bands and SMD markings with interactive resistor visualization.
Supported: 3-digit (`103`), 4-digit (`1004`), `R` notation (`4R7`), and E96 / EIA-96 (`01C`).
E96 quick guide: first two digits = value index, last letter = multiplier.
Common multipliers: Z = ×0.001, Y = ×0.01, X = ×0.1, A = ×1, B = ×10, C = ×100, D = ×1k.
Decoded Value
Frequently Asked Questions
How do you read resistor color bands?
Resistor color bands are decoded by reading the significant digits first, then the multiplier band, and then the tolerance band according to the standard color code sequence.
What do SMD resistor codes mean?
SMD resistor codes are compact markings that represent resistance values using numeric or alphanumeric formats such as three-digit, four-digit, or E96 style codes.
Resistor Color Code Standards
The resistor color code system, standardized by the IEC 60062 standard, uses colored bands to indicate the resistance value and tolerance of through-hole resistors. The RMA (Radio Manufacturers Association) color coding assigns specific numerical values to each color, enabling rapid identification of component values.
SMD Resistor Marking
Surface Mount Device (SMD) resistors commonly use compact marking systems. This tool supports standard 3-digit codes, 4-digit codes, R notation such as 4R7 for decimal values, and E96 / EIA-96 style codes such as 01C.
For E96 markings, the first two digits point to a preferred-value index and the trailing letter defines the multiplier. Manufacturer-specific variants may still exist, so the decoded value should be cross-checked with the component datasheet when precision matters.