Calculates the closest standard value for a given nonstandard value.
[*] Metric SI unit prefixes such as p=pico, n=nano, u=micro, m=milli, k=kilo, M=mega are valid.
E-Series of Preferred Numbers
The E series is a system of preferred values derived for use in electronic components such as capacitors, resistors, and inductors.
These values were chosen such that when a component is manufactured it will end up in a range of roughly equally spaced values on a logarithmic scale.
Each E series subdivides each decade magnitude into steps of 3, 6, 12, 24, 48, 96, 192 values.
Subdivisions of E3 to E192 ensure the maximum error will be divided in the order of 40%, 20%, 10%, 5%, 2%, 1%, 0.5%. The E192 series is also used for
0.25% and 0.1% tolerance resistors.
Historically, the E series is split into two major groupings:
E3, E6, E12, E24 are subsets of E24. Values in this group are rounded to 2 significant figures.
E48, E96, E192 are subsets of E192. Values in this group are rounded to 3 significant figures.