Cable Capacitance Calculator

Use this calculator to estimate the capacitance from one wire to all other wires in your cable. This calculator takes into account your fixturing length, cable length, and the presence of shields and will return an estimate of the capacitance a test will see from one wire to all other wires in the cable under test.

Step 1: Estimate the Capacitance

a) Units of Measurement
All lengths in
b) Your Fixturing

Estimated capacitance of fixture wiring is ___ pF/Foot (wire to wire capacitance).
Total length of fixturing connected to target wire   Feet (usually 2x the fixturing length between the DUT and tester)
Estimated Capacitance of Fixturing:___ pF
c) Your Device Under Test
Target wire is       
Other wires in cable/bundle       
Estimated capacitance is ___ pF/Foot (target wire to all other wires).
Total length of wire   Feet
Estimated capacitance of this wire net:___ nF
Estimate of Total Capacitance
  Estimated combined fixture and DUT capacitance:__ nF

Step 2: Estimate Hipot Safety

DC Hipot Information
For testers that limit hipot energy and charge the highest DC voltage that might be intrinsically safe is ___ Volts.
AC Hipot Information
AC hipot frequency
Total AC Current
Test VoltagemA AC RMSmA PeakIntrinsically Safe?