Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Ohm's Law Solver (V = IR)

Solves Ohm's Law for voltage, current, or resistance — pick the unknown and enter the other two values. Built on V = I × R, the foundational relationship of every electrical circuit.

Solve For

Voltage (leave 0 if solving for it) (V)

Current (leave 0 if solving for it) (A)

Resistance (leave 0 if solving for it) (Ω)

Electrical

Electrical Power Calculator

Calculates electrical power in watts from voltage and current using P = V × I. Used by electricians, engineers, and DIYers to size fuses, cables, power supplies, and estimate appliance energy use.

Voltage (V)

Current (A)

Key differences

	Ohm's Law Solver (V = IR)	Electrical Power Calculator
Category	Electrical	Electrical
Inputs required	4	2
Result	Result	Power (W)
What it does	Solves Ohm's Law for voltage, current, or resistance — pick the unknown and enter the other two values. Built on V = I × R, the foundational relationship of every electrical circuit.	Calculates electrical power in watts from voltage and current using P = V × I. Used by electricians, engineers, and DIYers to size fuses, cables, power supplies, and estimate appliance energy use.