How do I read a 4-band resistor?

A 4-band resistor has: Band 1 (first digit), Band 2 (second digit), Band 3 (multiplier), Band 4 (tolerance). For example, Red-Red-Red-Gold = 2.2kΩ ±5%.

What is the difference between 4-band and 5-band resistors?

5-band resistors add a third significant digit before the multiplier, allowing more precise values. They are common in precision resistors (1% tolerance or better).

What does the tolerance band mean?

The tolerance band indicates how much the actual resistance may deviate from the nominal value. Gold = ±5%, Silver = ±10%, Brown = ±1%, Red = ±2%.

Resistor Color Code Calculator

Decode resistor color bands. Supports 4-band and 5-band.

Band 1 (1st digit)

Band 2 (2nd digit)

Band 3 (multiplier)

Band 4 (tolerance)

1.00 kΩ

± 5% tolerance

Range: 950 Ω – 1.05 kΩ

Read resistor color codes in seconds

Select the color of each band and instantly see the resistance value, tolerance, and E-series membership. Works for both 4-band and 5-band resistors.

Frequently asked questions

How do I read a 4-band resistor?: A 4-band resistor has: Band 1 (first digit), Band 2 (second digit), Band 3 (multiplier), Band 4 (tolerance). For example, Red-Red-Red-Gold = 2.2kΩ ±5%.
What is the difference between 4-band and 5-band resistors?: 5-band resistors add a third significant digit before the multiplier, allowing more precise values. They are common in precision resistors (1% tolerance or better).
What does the tolerance band mean?: The tolerance band indicates how much the actual resistance may deviate from the nominal value. Gold = ±5%, Silver = ±10%, Brown = ±1%, Red = ±2%.

Read resistor color codes in seconds

Frequently asked questions

Related tools