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Resistor Color Code Calculator
Band 1
Band 2
Band 3
Multiplier
Tolerance
Resistance Value
100 ฮฉ
Tolerance
ยฑ5%
Range
95 - 105 ฮฉ
Color Reference
0
1
2
3
4
5
6
7
8
9
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How to Use the Resistor Calculator
- Select 4-band or 5-band mode
- Choose colors for each band
- View calculated resistance value
- See tolerance range
Reading Resistor Bands
- 4-Band - 2 digits + multiplier + tolerance
- 5-Band - 3 digits + multiplier + tolerance
- Orientation - Tolerance band is usually spaced further apart
- Gold/Silver - Only used for multiplier and tolerance
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Frequently Asked Questions
How do I read resistor color codes?
Each color represents a number. The first two bands are digits, the third is multiplier, and the fourth is tolerance.
What do the colors mean?
Black=0, Brown=1, Red=2, Orange=3, Yellow=4, Green=5, Blue=6, Violet=7, Gray=8, White=9.
What is resistor tolerance?
Tolerance is the accuracy range. Gold=ยฑ5%, Silver=ยฑ10%, Brown=ยฑ1%. Lower tolerance means more precise.
How do I remember color codes?
Use mnemonics like 'Better Be Right Or Your Great Big Venture Goes Wrong' for the color order.