Enter two of the following items from the DIRECT CURRENT(DC) electrical engineering set of variables, and this will solve for the remaining two:

* I = current(amps.)

* V = Electricity potential of voltage(volts)

* R = resistance(ohms)

* P = power(watts)

This calculator has 4 inputs.

* I = current(amps.)

* V = Electricity potential of voltage(volts)

* R = resistance(ohms)

* P = power(watts)

This calculator has 4 inputs.

- P = V x I

R = V/I

P = I^{2}R

I = V/R

V = P/I

V = I x R

For more math formulas, check out our Formula Dossier

- current
- the rate of flow of electricity. The unit of current is the ampere (A) which is defined as 1 ampere = 1 coulomb per second.
- electric
- the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge.
- law
- a mathematical statement which always holds true
- ohms law
- the current through a conductor between two points is directly proportional to the voltage across the two points

V = IR - power
- how many times to use the number in a multiplication
- resistance
- the property of any object or substance of resisting or opposing the flow of an electrical current.

R = V/I - volt
- the potential difference across a conductor when a current of one ampere dissipates one watt of power.