How does the Ohm's Law Calculator work?

Enter any two known values (V, I, R, or P) Then: The calculator solves the remaining two using Ohm's Law and the power formula Then: Results apply to DC circuits and to AC circuits at unity power factor.

Can you give an example of how to use the Ohm's Law Calculator?

Example: Input V = 12V · R = 47Ω gives a result of I = 12/47 ≈ 0.255 A · P = 12 × 0.255 ≈ 3.06 W (A 1/4W resistor would overheat here — use at least a 1/2W rated part).

Is the Ohm's Law Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Ohm's Law Calculator?

Our Ohm's Law Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

Praktikal

Ohm's Law Calculator

Solve For

Current (A)

Resistance (Ω)

Ohm's Law relates voltage, current, and resistance in electrical circuits. This calculator solves for any one of the four quantities — voltage (V), current (I), resistance (R), or power (P) — given any two known values.

Difficulty:beginner

References

›Ohm's Law — Wikipedia

🔒

100% Libre

Hindi kailangang mag-sign up

✓

Tumpak

Mga napatunayan na formula

⚡

Agarang

Resulta habang nagta-type

📱

Handa sa Mobile

Lahat ng device

Ohm's Law Calculator

Ohm's Law Calculator

Ano ang Ohm's Law Calculator?

Formula

Paano Ohm's Law Calculator

Mga Nalutas na Halimbawa

Mga praktikal na gamit

Visual na diagram

Mga Karaniwang Mali na Dapat Iwasan

Mga Setting