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Standard Resistor Values

Resistors are one of the four fundamental types of passive electronic components; the other three are the inductor, the capacitor, and the memristor. The basic unit of resistance is the ohm (Ω). Standard base resistor values are given in the following tables for the most commonly used tolerances (1%, 5%, 10%), along with typically available resistance ranges. To determine values other than the base, multiply the base value by 10; 100; 1,000; or 10,000.


Example: Calculations indicate the need for a 355 kΩ resistor and a tolerance of 1% .
Look in the 1% table and select the 35.7 value (the nearest available standard value). Multiply by 10 000 to convert to 357 kΩ.
1% Standard Values
Decade multiples are available from 10.0 Ω through 1.00 MΩ
(also 1.10 MΩ, 1.20 MΩ, 1.30 MΩ, 1.50 MΩ, 1.60 MΩ, 1.80 MΩ, 2.00 MΩ and 2.20 MΩ)
10.0 10.2 10.5 10.7 11.0 11.3 11.5 11.8 12.1 12.4 12.7 13.0
13.3 13.7 14.0 14.3 14.7 15.0 15.4 15.8 16.2 16.5 16.9 17.4
17.8 18.2 18.7 19.1 19.6 20.0 20.5 21.0 21.5 22.1 22.6 23.2
23.7 24.3 24.9 25.5 26.1 26.7 27.4 28.0 28.7 29.4 30.1 30.9
31.6 32.4 33.2 34.0 34.8 35.7 36.5 37.4 38.3 39.2 40.2 41.2
42.2 43.2 44.2 45.3 46.4 47.5 48.7 49.9 51.1 52.3 53.6 54.9
56.2 57.6 59.0 60.4 61.9 63.4 64.9 66.5 68.1 69.8 71.5 73.2
75.0 76.8 78.7 80.6 82.5 84.5 86.6 88.7 90.9 93.1 95.3 97.6

1% resistor value plot - RF CafeStandard resistor values are calculated using the simple formula given below. Round the results to the proper number of significant figures (3 for 1% and 2%, 2 for 5% and 10%). As the chart at the right shows (created in Excel), plotting the values on a logarithmic scale results in a straight line.
Standard resistor value equation - RF Cafe

 

5% Standard Values
Decade multiples are available from 10 Ω through 22 MΩ

10 11 12 13 15 16 18 20 22 24 27 30
33 36 39 43 47 51 56 62 68 75 82 91
 

10% Standard Values
Decade multiples are available from 10 Ω through 1 MΩ

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

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