NumberLab
Resistor Color Code Calculator
Decode 4-band resistor color codes into resistance, tolerance, and value range.
Band 1 (1st digit)
Black (0)
Brown (1)
Red (2)
Orange (3)
Yellow (4)
Green (5)
Blue (6)
Violet (7)
Gray (8)
White (9)
Band 2 (2nd digit)
Black (0)
Brown (1)
Red (2)
Orange (3)
Yellow (4)
Green (5)
Blue (6)
Violet (7)
Gray (8)
White (9)
Band 3 (multiplier)
Black (×1)
Brown (×10)
Red (×100)
Orange (×1K)
Yellow (×10K)
Green (×100K)
Blue (×1M)
Violet (×10M)
Gray (×100M)
White (×1B)
Gold (×0.1)
Silver (×0.01)
Band 4 (tolerance)
Brown (±1%)
Red (±2%)
Green (±0.5%)
Blue (±0.25%)
Violet (±0.1%)
Gray (±0.05%)
Gold (±5%)
Silver (±10%)
None (±20%)
Calculate
Enter values and calculate to see results here.