Resistor Color Code Calculator
A resistor color code calculator that supports Leaded and MELF resistors with bidirectional calculation between color bands and resistance values.
FIRSTOHM’s resistor color code calculator helps engineers and buyers quickly convert 3-band, 4-band, and 5-band resistor color codes into resistance values, tolerance ranges, and corresponding band colors. It is suitable for basic identification and selection reference for Leaded resistors and MELF surface-mount resistors.
Resistor Color Code Calculator
Resistor Color Code Calculator - Leaded & MELF
4-band mode: digit, digit, multiplier, tolerance.
Preview
Leaded Resistor
12 Ω
Tolerance: ±5%
Range: 11.4 Ω - 12.6 Ω
Range: 11.4 Ω - 12.6 Ω
Series Identification
Current Bands
Please enter a resistance value and click Calculate
Standard Values Reference
E12 Series (±10%):
1.0, 1.2, 1.5, 1.8, 2.2, 2.7, 3.3, 3.9, 4.7, 5.6, 6.8, 8.2
E24 Series (±5%):
1.0, 1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2.0, 2.2, 2.4, 2.7, 3.0,
3.3, 3.6, 3.9, 4.3, 4.7, 5.1, 5.6, 6.2, 6.8, 7.5, 8.2, 9.1
Input Format Examples:
• 220 = 220 Ω
• 4.7k = 4.7 kΩ
• 10M = 10 MΩ
• 1.5k = 1.5 kΩ
1.0, 1.2, 1.5, 1.8, 2.2, 2.7, 3.3, 3.9, 4.7, 5.6, 6.8, 8.2
E24 Series (±5%):
1.0, 1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2.0, 2.2, 2.4, 2.7, 3.0,
3.3, 3.6, 3.9, 4.3, 4.7, 5.1, 5.6, 6.2, 6.8, 7.5, 8.2, 9.1
Input Format Examples:
• 220 = 220 Ω
• 4.7k = 4.7 kΩ
• 10M = 10 MΩ
• 1.5k = 1.5 kΩ