This is an Ohm's Law Calculator with a built-in mini-guide to refer to if required.

The calculator is very easy to use, enter two known values, select the units, press 'Calculate' and the other two values will be displayed instantly!

The guide contains 7 parts:

• Ohm's law
• Watt's law
• Adding resistances
• Voltage formulae
• Current formulae
• Resistance formulae
• Power formulae

If you want to be able to understand how the Ohm's law calculations are carried out, or would like a handy reference guide, this is the app for you!