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

Ohm's Law Calculator

Calculate electrical resistance from voltage and current using Ohm's Law: R = V / I. Use it for circuit analysis, troubleshooting electronic circuits, or sizing resistors and conductors in DC and AC (resistive) systems.

Voltage (V)

Current (A)

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Electrical

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

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Key differences

	Ohm's Law Calculator	Ohm's Law & Power Calculator
Category	Engineering	Electrical
Inputs required	2	4
Result	Resistance (Ω)	Power (W)
What it does	Calculate electrical resistance from voltage and current using Ohm's Law: R = V / I. Use it for circuit analysis, troubleshooting electronic circuits, or sizing resistors and conductors in DC and AC (resistive) systems.	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.