Standard Resistance Finder

Desired Resistance
The exact resistance you want to find.
SeriesClosest Resistance (Ω)Percentage Error (%)Closest Equal Or Lower Resistance (Ω)Percentage Error (%)Closest Equal Or Higher Resistance (Ω)Percentage Error (%)

What Is This?

Enter your desired resistance, and this calculator will find the closest preferred value (purchasable resistance) in each one of the EIA E series, from E6 to E192. The percentage difference between your desired resistance and the preferred value is also shown for each E series.

More information on the E series can be found at


Note that although the E48 series has more values per decade than say, the E24 series, you might find a closer resistance in the E24 series due to the E6, E12 and E24 using a different number sequence to the E48, E96 and E192 series.

If your desired resistance is exactly half-way (in percentage terms) between two preferred values, this calculator will choose the higher resistance.