Select colors to calculate resistance • Supports 4, 5 & 6 bands
Tip: Click any band on the resistor to select it • Gold/Silver only allowed for multiplier & tolerance
Our comprehensive Resistor Color Code Calculator helps electronics enthusiasts, engineers, students, and hobbyists quickly identify resistor values from their color bands. Whether you're building electronic circuits, repairing devices, studying electronics, or organizing components, this tool provides accurate resistor decoding following international EIA standards.
Decode 4-band, 5-band, and 6-band resistors, calculate resistance values with tolerance, determine temperature coefficients, convert between Ω, kΩ, and MΩ, and learn resistor color coding standards with our specialized electronics calculator.
Supports all standard resistor types: 4-band (2 significant digits), 5-band (3 significant digits), 6-band (with temperature coefficient). Includes E-series values (E6, E12, E24, E48, E96, E192).
Calculates power ratings, voltage drops, and current limits. Shows nearest standard resistor values for circuit design. Essential for prototyping and electronic projects.
Teaches color coding system with mnemonic devices: "Bad Boys Rape Our Young Girls But Violet Gives Willingly" (Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Grey, White).
Includes SMD code calculator (3-digit, 4-digit, EIA-96), reverse lookup (find colors for desired value), tolerance calculations, and parallel/series resistance combinations.
Used by electronics engineers, students, hobbyists, and repair technicians worldwide. Never misread a resistor value again with our accurate color code calculator!
For 4-band resistors: Band 1 = First digit, Band 2 = Second digit, Band 3 = Multiplier (number of zeros), Band 4 = Tolerance (±%). Example: Brown(1), Black(0), Red(×100), Gold(±5%) = 10 × 100 = 1000Ω ±5%.
5-band resistors have 3 significant digits: Band 1-2-3 = digits, Band 4 = multiplier, Band 5 = tolerance. Example: Brown(1), Black(0), Black(0), Red(×100), Brown(±1%) = 100 × 100 = 10,000Ω ±1% = 10kΩ.
Gold band = ±5% tolerance, Silver band = ±10% tolerance, No band = ±20% tolerance. Precision resistors use: Brown(±1%), Red(±2%), Green(±0.5%), Blue(±0.25%), Violet(±0.1%).
Look for the tolerance band (gold or silver) - it's usually on the right. If no tolerance band, the closer band to one end is band 1. For 6-band resistors, the temperature coefficient band (usually brown, red, orange, yellow) is last.