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Ohm's Law & Calculator

Ohm's Law relates the three fundamental electrical quantities: voltage, current and resistance. Power relationships are also given.

Click here for a much more extensive treatment of Ohm's Law.


V = I · R	I = V R	R = V I
P = I · V	P = I² R	P = V² R
I = Current (A) P = Power (W) R = Resistance (Ω) V = Voltage (V)

Ohm's Law Calculator Please click the Calculate Button for results

I=	A	V =	V
R=	Ω	P =	W

V=	V	I =	A
R=	Ω	P =	W

V=	V	R =	Ω
I=	A	P =	W

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...

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