Bands are read from the end opposite the tolerance band. A 4-band resistor has two value digits. A 5-band resistor has three.
Colour appearance varies with paint and age. Confirm a critical value with a meter. This does not cover 6-band temperature-coefficient codes.
These tools are quick guides for a ballpark figure. They are not certified design or test software, and a result on this page is not a design, a certificate, or a substitute for the current edition of BS 7671. Check the working and cross-reference it before you apply it to a real installation. Thanet Electrical Ltd does not accept liability for loss or cost arising from reliance on these figures, except where the law does not allow that liability to be excluded, including death or personal injury caused by negligence.
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