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Could somebody give me a formula to convert Pascals to PSI? I understand that you probably have to convert Pounds of Force to Newtons. But where do I go from there?

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    This ought to be in [physics.SE](http://physics.stackexchange.com/). Anyway, typing `pascal to PSI` in Google nets you the conversion factor.2011-09-15

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According to Wikipedia, a pound-force is 4.4482216152605 N exactly. An inch is by definition 0.0254 meters exactly, so $1\,\text{PSI} = \frac{4.4482216152605\,\mathrm N}{(0.0254\,\mathrm m)^2} \approx 6894.75729\,\mathrm{Pa}$ or $1 = 6894.75729 \frac{\mathrm{Pa}}{\mathrm{PSI}}$ Divide your pascal magnitude by this unity, and you will get the same magnitude expressed in PSI.