# Calculating frequencies

#### Anthony Souza

Nov 10, 2017
2
I have the appropriate formulas but I am not sure my answers are correct since I am not sure how to multiply microfarads and microhenries. Any advice will be greatly appreciated.

#### BobK

Jan 5, 2010
7,682
If you simply ignore the exponents, the result will be in Megahertz.

Bob

#### Harald Kapp

##### Moderator
Moderator
Nov 17, 2011
12,737
µF * µH = 10e-6 * (A*s)/V * 10e-6 * (V*S)/A = 10 e-12 * s²

The resonance frequency of an LC circuit is given by f0 = 1/(2*pi*sqrt(L*C)) . Insert the above result and get a result in th eMHz range, as per Bob's answer.

#### AnalogKid

Jun 10, 2015
2,671
Not to be picky or anything, but -

"Calculating frequencies" of what? I calculate the frequency of my lawn mower engine by observing the dominant component of the acoustic noise and dividing that by 2.

ak

#### Anthony Souza

Nov 10, 2017
2
I have the appropriate formulas but I am not sure my answers are correct since I am not sure how to multiply microfarads and microhenries. Any advice will be greatly appreciated.

Thanks everyone, you were all a great help especially the site for the resonance calculator. I'm extremely grateful for the quick responses.

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