The Best RC Filter Calculator Ever*

Find the best resistor and capacitor for a low/highpass filter given the desired cutoff frequency. 
    Vin ├──<R>──Vout──<C>──┤ 0 V
or 
    Vin ├──<C>──Vout──<R>──┤ 0 V
depending on the context.
fcutoff
Precision (R)
Precision (C)
Resistor Scale
Sort by abs(error) ±error fcutoff, actual
 
R C % Error fcutoff, actual

* This project is an homage to the best voltage divider calculator ever; I couldn't find one of the bajillions out there that's quick to use and displayed the information needed when finding resistor and capacitor values in a practical design. So I modified the best voltage divider calculator ever to match my desires.

Creative Commons License
The best RC filter calculator ever by Sam Gronwold is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License