How do you Convert PS to HP?

Hi I was wondering if anyone could tell me how to convert ps to hp. I was trying to figure out what 300ps, 360ps, and 390ps was in hp but I didn't know how to convert it.

By the way if you know how to convert kW to hp you can feel free to include that as well.

Thanks

PS (pferdestarke) is the german abbreviation for horsepower. They're one and the same.

1 Kilowatt = ~1 1/3 Horsepower, if I recall correctly.

Edit - Well, this site says differently. ::shrug::

http://www.autospeed.com/cms/A_1228/article.html

HP to KW: take the HP number and multiply by .75
KW to HP: divide the KW number by .75

HP to PS: the numbers for these are almost interchangable, they are withing .xx of each other, so if you only have the PS number the HP is about the same.

Okay, thanks guys.

1 horsepower (hp) = 1.0139 pferdestarke (ps)