conductive thread resistance
calculate the resistance of conductive thread by type, length, and strand count. includes an optional LED circuit check.
thread type
most common for soft circuits
length
unit
strands
doubling thread halves resistance — useful for lower-resistance runs
thread resistance13.8 Ω
formula27.6 × 0.50m
thread reference
adafruit 2-ply stainless27.6 Ω/m
adafruit 3-ply stainless14.4 Ω/m
sparkfun silver-coated20 Ω/m
bekaert bekitex1 Ω/m
shieldex 117/17 dtex500 Ω/m
resistance values are typical — measure your actual thread with a multimeter for precision. resistance increases with wear, washing, and oxidation.