Title : How to calculate resistivity of resister using colour code.

Colour code table

Band Colour	1st Band	2nd Band	Multiplier x	Tolerance
Silver			÷ 100	10%
Gold			÷ 10	5%
Black	0	0	1
Brown	1	1	10	1%
Red	2	2	100	2%
Orange	3	3	1000
Yellow	4	4	10,000
Green	5	5	100,000
Blue	6	6	1,000,000
Violet	7	7
Grey	8	8
White	9	9

Hint for remember colour code - BB ROY Goes to Britten Visky Given by Wife ( you can also make other sentence)

Example: Band 1 = Red, Band 2 = Violet, Band 3 = Orange, Band 4 = Gold			Too many zeros?
The value of this resistor would be:			kilo ohms and mega
2 (Red) 7 (Violet) x1,000 (Orange)	= 27 x 1,000		ohms can be used:
	= 27,000 with a 5% tolerance (gold)		1,000 ohms =1k
	= 27k ohms Note- SILVER and GOLD for tolerance as per shown in chart similararly if 4th band is absent on resistor means its 20% tolerence (for no band)