Resistor Color Code Calculator
Decode 4- or 5-band resistors instantly. Select each color band to read the resistance and tolerance range.
Resistance
1 kΩ
Tolerance: ±2% — range: 980 Ω to 1.02 kΩ
Frequently Asked Questions
How do I read a 4-band resistor?+
The first two bands are significant digits, the third is the multiplier (power of 10), and the fourth is the tolerance. For example, Brown-Black-Red-Gold = 1, 0, ×100, ±5% = 1 kΩ ±5%.
What is the difference between 4-band and 5-band resistors?+
5-band resistors have an extra significant digit (three digits before the multiplier), giving tighter precision — they're common in 1% tolerance components.
What does the gold or silver band mean?+
Gold = ±5% tolerance, silver = ±10%. They appear as the last band. No tolerance band implies ±20%.