Subscribe to our newsletter:

Resistor Pro

iPhone / iPad
  • Utilities
  • Education
I want this app
Download from AppStore

A free and simple tool for engineers and students. Resistor Pro calculates the value of 4 band resistors from their color codes. Simply swipe the color on the bands and obtain the exact value in Ohms.

Search Mode
Search a resistor value in Ohms and obtain the matching color code.

Upcoming Features

-5 & 6 band Resistors
-Ohm's Law Calculator
-Universal Support