Chris Gillings

"I Make Things Work"

EIA Resistor Combination Calculator
Find the combinations of two or three resistors that equal a desired value.
Values used for the calculation cover the EIA values over the range 10 - 10000.

Resistor Range Tolerance Decade Values

E6 20% tolerance 10 15 22 33 47 68

E12 10% tolerance 10 12 15 18 22 27 33 39 47 56 68 82

E24 5% tolerance (and usually 2% tolerance) 10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 56 62 68 75 82 91

Resistor Count Mode Accuracy

2 Series

3 Parallel

Desired Value

Resistor Range	Tolerance	Decade Values
E6	20% tolerance	10 15 22 33 47 68
E12	10% tolerance	10 12 15 18 22 27 33 39 47 56 68 82
E24	5% tolerance (and usually 2% tolerance)	10 11 12 13 15 16 18 20 22 24 27 30 33 36 39 43 47 51 56 62 68 75 82 91