Resistor Color Code Calculator
Calculate resistance and tolerance values from 4-band and 5-band color rings with interactive visual feedback.
Resistor Color Code Calculator
Calculate resistance and tolerance values from 4-band and 5-band color rings with interactive visual feedback.
How to Use Resistor Color Code Calculator
1. Choose 4, 5, or 6 Bands
Select whether your axial resistor has 4 bands (standard), 5 bands (precision), or 6 bands (with temperature coefficient).
2. Select Color for Each Band
Click each band on the visual resistor to pick its color according to EIA-96 / IEC 60062 standards.
3. Read Resistance & Tolerance
View the decoded resistance value in Ohms (Ω, kΩ, MΩ), tolerance percentage (±1%, ±5%), and temperature ppm/K.
How This Utility Works
Interactive electronic resistor color code decoder. Choose 4-band or 5-band configurations, select standard EIA resistor color rings, and calculate exact ohmic resistance values and manufacturing tolerance percentages with real-time graphical schematics.
Hardware testers communicate strictly with browser Gamepad, Canvas, and Display APIs. No background drivers or telemetry are installed.
Frequently Asked Questions
What is the difference between 4-band and 5-band resistors?
4-band resistors use 2 significant digit bands and a multiplier, whereas high-precision 5-band resistors add a 3rd significant digit band before the multiplier.
Resistor Color Band Code Reference
| Color Band | Significant Digit | Multiplier | Tolerance (±%) |
|---|---|---|---|
| Black | 0 | 10^0 (x1) | — |
| Brown | 1 | 10^1 (x10) | ±1% (F) |
| Red | 2 | 10^2 (x100) | ±2% (G) |
| Orange / Yellow | 3 / 4 | 10^3 (x1k) / 10^4 (x10k) | — |
| Green / Blue | 5 / 6 | 10^5 (x100k) / 10^6 (x1M) | ±0.5% (D) / ±0.25% (C) |
| Gold / Silver | — | 10^-1 (x0.1) / 10^-2 (x0.01) | ±5% (J) / ±10% (K) |