Calculatorism

Ohm's Law Calculator

From current and resistance compute voltage and power (V=IR, P=I²R).

Input Data

Input Current I.
A
Input Resistance R.
Ω

Results

220V
1,100W
V = I·R = 220.000000 V, P = I²·R = 1100.000000 W

At a glance:Ohm's Law Calculator: enter parameters to compute results; complements related calculators.

Formula

V = I·R

P = I²·R = V²/R

How to Use

  1. Enter current I and resistance R.
  2. Get voltage V and power P.

Case Studies

I=5 A, R=44 Ω

V = 5×44 = 220 V, P = 25×44 = 1100 W.

FAQ

The three forms?

V=IR, P=VI, P=I²R=V²/R are equivalent.

AC?

Holds for pure resistance; use impedance for reactance.

Related Tools

References

Content review: Calculatorism Science Team. Formula and numeric tests verified; results for reference only.

Found a problem with the results?

If this calculator's result is wrong, or you have any question about the calculation logic, please let us know. You are viewing:Ohm's Law Calculator（/electric/ohms-law）。