# Electrical Engineering Calculators

We have electrical engineering apps and tools which can be useful for study and problem solving.

## Ohm’s Law Calculator

Ohm’s Law is a fundamental theory of electrical engineering that deals with the relationship between current, voltage and resistance.

Our Ohm’s law calculator allows you to calculate the voltage, resistance, or current. Simply type in the other two parameters and hit ‘Calculate’ – and we’ll solve the problem for you.

## Voltage Divider Calculator

A voltage divider is a fundamental circuit in the field of electronics used to produce an output voltage (Vout) that is a fraction of its input voltage (Vin or Vs).

Our voltage divider calculator does this calculation for you – simply type in the Voltage Source (Vs) and two resistances (R1 and R2) to calculate the output voltage (Vout).

## Parallel Resistor Calculator

Two resistors in parallel is equivalent to one resistor in series.

Simply type in your two parallel resistances (R1 and R2) and our calculate will figure out the equivalent resistance (Re) for you!

## Single and Three Phase Transformer Calculator

Calculate the turns ratio, voltage ratio, type of transformer, and primary current.

Simply input whether your transformer is a single or three phase transformer, plus the power rating and the primary and secondary voltage.

## Resistor Color Code Calculator

Our resistor color code calculator allows you to calculate the resistance for 3 band, 4 band, and 5 band resistors!

Simply select the colors you’re using for your resistor and the calculator will output the correct resistance.

We also have the reverse calculator, where you can input a resistance value for a 3, 4, or 5 band resistor to see the correct resistor coloring needed to achieve your desired resistance value.