I've always wondered this, too.

There is not enough back pressure in your colon to messure it with a tire gauge. the question really is SPI (smells per inch) thats a question

For a real good time, stick a bicycle pump up your ass and blow up your stomach. Then squeeze and a long, loud fart blows out.
NOTE: I do not recommend this and have NEVER tried it myself. It's just gross, dude!

I suppose if you had a hose full of Mercury, and you stuck your ass on one end of the hose, and measured how far the mercury rose, you would have a measurement in Inches of Mercury.
Somewhere on a website about math, there is a formula to convert inches of mercury (IN/Hg) to PSI.

Hey, girls! Don't you hate it when you fart and the fart bubble moves through your front butt cheeks? It drives me crazy, especially when I'm in public and can't just randomly laugh from the tickle without looking like a nut job.

Do boys have front butt cracks too?

Stephan: To measure the pressure of fart gas you could rig a simple water manometer to a rubber hose and insert it into your asshole when you feel a fart coming on. The pressure of the fart is equal to the number of millimeters the column of water in the manometer is displaced. One could also rig a spirometer to a tube and fart through that. I wouldn't recommend using Slim Jim Junkie's mercury method because you could risk sucking mercury up your ass, and we all know how toxic that is. Good luck.

I WANNA LEARN HOW 2 FART!

I've been having this problem recently as I've started going commando in a skirt. Everytime I have a huge fart it slaps across my cheeks and hurts. Especially the ones that crack up my pussy lips. I think I will try measuring the PSI of these things. Then again, that will look pretty strange when I stick a gauge down there.

why light a match after taking a poo ? i don't understand .

the smokey sulfur smell covers up your shit stink. Is this really such a complicated thing? The world is doomed.

Wouldn't an individual want to use a meter that measures speed and pressure. I wonder if an instrument that measures velocity might not be more accurage.

I would think velocity would directly correlate to the actual psi. I do think if you took a basic vacuume guage and inserted the hose just a bit into your butt, and then released the wind, it should give you a relatively accurate reading.

Through mathmetical equations, I'm sure you could calculate the speed as well. This would be a great problem for the dude on NUMBERS.

Might be able to come up with FPI (farts per inch). Then there always the Stinkometer to measure how stinky it is, and the degree of waift ability etc etc.

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Regional POWER POOPING CHAMPION 1988-2006
Poop Shooter!

It's a volume, speed, pressure equation that you'd have to measure; therefore, Mr. Bunghole tells me no.... Perhaps a Butthole Doplar which would include dewpoint as well. For the stink factor, probably an olfactometer incorporated. There would be the TRUE measurement of the fart.

What about those doohickeys that asthmatics blow into? Can those be used to measure the PSI of a fart?

This thread resembles my sex life. A lot of talk about how to do it, but nothing ever gets done.

Dumpster, your comment reminds me of the IBM Manager joke when he's in the boudoir with his wife.... Guess you blue boys have something in common.

One would appreciate being made privy to the joke, Bunghole.

Is someone a little testy today? I just didn't tell the joke, because it's a classic oldie and figured you'd already heard it. Here goes:

Three women were sitting around talking about their husbands’ performance as lovers. The first woman says, “My husband works as a marriage counselor. He always buys be flowers and candy before we make love.” The second woman says, “My husband is a motorcycle mechanic. He likes to play rough.” The third woman says, “My husband is a manager at IBM. He sits on the edge of the bed and tells me how great it’s going to be when I get it.”

HAHAHA!!!! No, believe it or not, that is one joke I hadn't heard before!

But it reminds me of another one: This lady goes to the doctor for a physical exam. "I'm getting married for the fourth time tomorrow," she says, "and I want to make sure everything's all right."

The doc examines her, and says, "madam, you are in extremely good health, but I'm curious about one thing: You said you have been married three times already, yet I find you are still a virgin. How can this be?"

"Well," she says, "the first time, I was married to a gynecologist, and all he wanted to do was look at it.

"The second time, I was married to a psychiatrist, and all he wanted to do was talk about it.

"The third time, I was married to a contractor, and he just kept saying, 'two weeks! Two weeks!'

"But THIS time," she concluded, "I'm marrying a lawyer, so I KNOW I'll get screwed!"

haha, this is worth commenting on just so people will see these jokes.

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Number One . . . I order you to take a number two.

After drinking loads of ale i sometimes sqirt pure water, well not pure but clear with small traces of tabac that float. the amont of gas fired out is more than consumed and when i get up the water has gone round the u bend. thats some psi.

[Flounder's voice, of Animal House]: Hiya Guys... just stumbled into this site while surfing while, what else? pooping. Really cool! Unrestrained poopie-tawk -- I must be in heaven.

I think I love you, Shit Volcano!

Interesting... how many psi is a fart..?

I'm guessing it somewhere around 10 - 15 bar like an espresso maker..which is approx 150 - 210 psi.. Although on a good day you could probably manage 250 psi. At that rate you would have blown it out your ass at such a rate, I venture to say that a sonic boom may result and shatter all the windows in your apartment, and the porcelain pot, if you happen to be sitting on one at the time may prove to be much like an aircraft ejector seat.... whew ... what a mess... and a stink!

Dumpster, I heard the joke included a gourmet! ;)

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You have the right to remain Silent but Deadly....

Wow thought provoking aint it? My farts are loud and can gag a maggot BUT PSI hmmmmmm Im gonna have to think about this one...............I would say not very powerful I mean not even enuff to shake a table lamp.
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The Thunderous Crapper 63 Enjoying home toilet advantage since 2004!

TC63, There's volume, pressure, and stench.
I'd rather have the stench if I had a choice, hence my signature...

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You have the right to remain Silent but Deadly....

Funny TSV should mention going commando...I am always in that state, and when I get a butt blast with some force behind it, invariably my nuts get slammed into my stomach, then on the return arc, get completely wedged in my butt cheeks. Maybe the Thong Boys were right....oh Bunga....got an extra one?

Check out this movie: http://www.metacafe.com/watch/271044/fire_fart/

This is truly the most enviable example I have ever witnessed of the power of a fart... In an amazing display, this guy, in the most spectacular fashion, lights a candle with one mother of of a fart... you wont be disapointed!

I think the answer is between 2 and 3 psi tops. Gastro docs treating patients for fecal incontinence (poor souls) use a technique called anorectal manometry to measure. A 1 psi differential would lift a column of water in a manometer 27 inches.

Woman do fart.... BIG..

My ex wife could fart longer, louder and smellier that I could ever achieve..! That's not the reason we got divorced....

A fun post would be mesuring our FPM (farts per minute) on a gassy day. I'm sure I could crack 5 or 6 nice FPM on a good day after a cheese dijornos pizza. As for FPSI, that thing you blow into to measure your lung strength where the ball goes up the tube should do the trick. (I don't know what its called)

I think a better question here is can you blow a "gasket" holding back a fart?

After playing the trombone a few years, I developed strong lips and lungs and would use them blow a girl up like a balloon, while in a 69 position. I could measure the fart pressure with my tongue when I squeezed her and my tongue would fly out of her anus.