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Calcimator

E-Textile Resistance Calculator

Calculate conductive thread and e-textile trace resistance from material type, thread dimensions, stitch count, wash cycles, and operating temperature.

Inputs

Results

Total resistance (ohm)

218.4

Thread resistance (ohm)200
Stitch junction resistance (ohm)10
Resistance per cm (ohm/cm)2
Current at 3.3V (mA)15.11
Power at 3.3V (mW)49.86
Wash degradation (%)0
Resistance after 50 washes (ohm)436.8
Safe Current Ma$7.07
Safe Current Calc$15.13
How to Use This Calculator
  1. Select your conductive thread material (silver-coated nylon, stainless steel, carbon, or copper wire).
  2. Enter the total thread length (cm), thread diameter (mm), and number of stitch junctions in the circuit.
  3. Set the contact resistance per stitch (Ω) based on construction quality — typically 0.1–2 Ω.
  4. Enter wash cycles completed and operating temperature (°C) to account for degradation.
  5. Review total resistance (Ω), estimated current at 3.3 V, and power dissipation in the outputs.
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