Tools & Calculators

From identifying mystery components to calculating what the current will be, sometimes a dedicated calculator is much more useful than trusting ourselves to remember the forum√¶. Other times it’s good to have the tool when we just want to double-check our own work.

Ohm's Law Calculator

Quickly find voltage, current and resistance with our online ohm's law calculator. Entering any two values will help you find the third.

Resistor Value Calculator

Identify which resistor you see in a circuit quickly and easily. Works with through-hole (THT) and Surface Mount Device (SMD). Just enter the colour bands or SMD code and find out. Works on 4, 5 and 6 band THT and 3 and 4 Digit SMD's.