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.

Vitendo

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% Bure

Hakuna usajili

✓

Sahihi

Mifumo iliyothibitishwa

⚡

Papo Hapo

Matokeo unapoandika

📱

Tayari kwa Simu

Vifaa vyote

Ohm's Law Calculator

Ohm's Law Calculator

Ni nini Ohm's Law Calculator?

Mfumo

Jinsi ya Ohm's Law Calculator

Mifano Iliyotatuliwa

Matumizi ya vitendo

Mchoro wa kuona

Makosa ya Kawaida ya Kuepuka

Mipangilio

Ohm's Law Calculator