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)

Result

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)

Fill in the required fields to see your result.

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.