See, this is why I hated physics so much and am refusing to commit seriously to doing any more math for this.

joules are newtons per meter.

Coulombs are a measure of electric charge.

volts are joules per coulomb.

Amps are coulombs per second.

Volts can also be calculated as Amps times resistance.

Watts are joules per second.

I forget how to calculate watts using electrical units, but there's some way to do it.

I may or may not be missing some stuff. I forget how to find resistance, for example.