www.qrp4fun.de Calculation of parallel/series connections of 2 resistors E12/E24/E48

If a resistor is not available as a standard value in the basic series, the series connection of 2 resistors is offered.
 
Series E12: 100, 120, 150, 180, 220, 270, 330, 390, 470, 560, 680, 820
 
Series E24: 100, 110, 120, 130, 150, 160, 180, 200, 220, 240, 270, 300,
330, 360, 390, 430, 470, 510, 560, 620, 680, 750, 820, 910
 
Series E48: 100, 105, 110, 115, 121, 127, 133, 140, 147, 154, 162, 169,
178, 187, 196, 205, 215, 226, 237, 249, 261, 274, 287, 301,
316, 332, 348, 365, 383, 402, 422, 442, 464, 487, 511, 536,
562, 590, 619, 649, 681, 715, 750, 787, 825, 866, 901, 953
 
Possible resistor combinations can be calculated with this javascript using the selected series.

The idea for this calculation was created when reading the article in [1]. There, the calculation of the parallel connection of resistors is presented with an Excel file.
 
[1] Klaus Wollert, DL7KWB: miniRcalc zur Berechnung parallelgeschalteter Widerstände. Funkamateur 7/2016, S. 634-635