IEC 60063 · E12 · E24 · E48 · E96 · E192
Enter the value you calculated: the closest standard resistor in every E-series, or a series or parallel pair that gets even closer, with its colour code.
Accepted: 4700 · 4.7k · 4k7 · 0R47 · 2.2M · 150m (milliohms)
Closest single value and best two-resistor pairs in each series, with the relative error to your target.
| Series | Single | Error | Series R1 + R2 | Error | Parallel R1 ∥ R2 | Error |
|---|
Highlighted cells: overall best match. Disabled combinations show “—”. Negative error = below target.
The E-series defined by IEC 60063 are preferred numbers spaced geometrically within each decade. E12 has 12 values (±10 %), E24 has 24 (±5 %), E48 has 48 (±2 %), E96 has 96 (±1 %) and E192 has 192 (±0.5 % and better). E12 and E24 use two significant digits, the others three.
Combine two standard resistors. In series R = R1 + R2; in parallel R = R1·R2 / (R1 + R2). A pair from E12 or E24 often gets closer than a single precision part, and the combination keeps the tolerance of its parts.
E12 and E24 parts use 4 bands: two digits, a multiplier and the tolerance. From E48 upward, 5 bands are used: three digits, a multiplier and the tolerance (red ±2 %, brown ±1 %, green ±0.5 %).