🔧 Resistor Color Code Calculator
Decode resistor color bands to resistance value
Resistance
1.00 kOhms ±5%
Step-by-step
- 1.Significant digits: Brown(1) Black(0) = 10
- 2.Multiplier: Red = ×100
- 3.Resistance = 10 × 100 = 1.00 kOhms
- 4.Tolerance: Gold = ±5%
How Resistor Color Codes Work
- 1Each color band on a resistor represents a digit or multiplier.
- 2The first two (or three) bands are significant digits.
- 3The next band is the multiplier (power of 10).
- 4The last band indicates tolerance (gold = ±5%, silver = ±10%).
- 5For reverse lookup, enter a resistance value to see the corresponding color bands.
About Resistor Color Code Calculator
Decode resistor color bands to find resistance value and tolerance. Supports 4-band and 5-band resistors. Also reverse-lookup: enter a value to see the colors.
Frequently Asked Questions
How do I read a 4-band resistor?
Band 1 = first digit, Band 2 = second digit, Band 3 = multiplier, Band 4 = tolerance. For example: Brown-Black-Red-Gold = 10 × 100 = 1000Ω ±5%.
What is the difference between 4-band and 5-band?
5-band resistors have an extra significant digit for higher precision. Band 1-3 are digits, Band 4 is the multiplier, Band 5 is tolerance. They're used in precision circuits.
How do I remember the color order?
A common mnemonic: 'Better Be Right Or Your Great Big Venture Goes Wrong' — Black(0), Brown(1), Red(2), Orange(3), Yellow(4), Green(5), Blue(6), Violet(7), Grey(8), White(9).