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

Ohm's Law & Power Calculator

Solve for voltage, current, resistance, or power in any DC circuit by entering just two known electrical values. Ideal for electronics hobbyists, electricians, and students checking circuit designs.

First Known Value

First Value Type

Second Known Value

Second Value Type

Fill in the required fields to see your 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 & Power Calculator	Electrical Power Calculator
Category	Electrical	Electrical
Inputs required	4	2
Result	Power (W)	Power (W)
What it does	Solve for voltage, current, resistance, or power in any DC circuit by entering just two known electrical values. Ideal for electronics hobbyists, electricians, and students checking circuit designs.	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.