⚡ CircuitSecrets
Resistor Color Code Calculator
4-band & 5-band resistor calculator per IEC 60062 — Color→Value, Value→Color, tolerance range, E-series check & visual display
4-Band
5-Band
IEC 60062
Color→Value
Value→Color
E-Series
Band Selection
Color → Value
Number of Bands
4-Band
5-Band
Select Band Colors
Result
Resistance Value
► Calculation Method
IEC 60062 Color Code Method
4-Band: (D1×10 + D2) × Multiplier
5-Band: (D1×100 + D2×10 + D3) × Multiplier
Tolerance: Last band → ±% of nominal
Range: Value × (1 ± Tolerance/100)
Value Input
Value → Color
Resistance Value
Configuration
4-Band
5-Band
Color Bands
Band Result
► Calculation Method
Value → Color Encoding
Step 1: Convert to scientific notation
Step 2: Extract significant digits
Step 3: Map digits → digit colors
Step 4: Exponent → multiplier color
Step 5: Append tolerance band
IEC 60062
Color Code Reference Table
| Color | Digit | Multiplier | Tolerance | Temp. Coeff. |
|---|
⚠ Professional Note: Always verify resistor values with a calibrated multimeter before use in critical applications. Color perception varies — use the reference table when in doubt. IEC 60062 standard applies.
