Standard Resistor Closest Value

Enter value and click on calculate. Result will be displayed.
Desired Value:
IEA Series:  
Closest Value (Ω):  /  Error (%):
E6:
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E12:
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E24:
/
E48:
/
E96:
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E192:
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The Standard Resistor Closest Value refers to the nearest available resistor value from a standardized series of preferred resistor values. Resistors are manufactured in specific, standardized values defined by the E-series (like E6, E12, E24, E48, E96, and E192), where each series has a different level of precision and number of available values per decade (like 10, 100, 1000 ohms, etc.).

Here's a quick breakdown:

E6 Series: 20% tolerance, 6 values per decade (like 10, 15, 22, 33, 47, 68)
E12 Series: 10% tolerance, 12 values per decade
E24 Series: 5% tolerance, 24 values per decade
E48, E96, E192 Series: 2%, 1%, and 0.5% or tighter tolerance — used for precision applications
Example:
Suppose you calculate a needed resistance of 9.2 kΩ, but resistors aren't made for every possible value.

In the E12 series, the closest value would be 10 kΩ.
In the E96 series, you'd find 9.09 kΩ — a much closer match.
You can use a Standard Resistor Closest Value Calculator to quickly match any required resistance to the nearest available real-world component value.