Magnet repulsion distance calculation

[thebluser]

hey, so let's say i have 2 Neodymium magnets with a pull force of 10 pounds and set them at a position where they repell themselves. so my question is: how can i know in what distance will the top magnet be from the other one?
if there's and equation for that or an explanation, please tell them, they will be very welcomed.
p.s. I am not very good at physics, so if you somehow find this question as a stupid one just so you'll know.

 

[mfb]

If you know details about the magnets, you can probably simulate it. In general, those systems are hard to calculate, and testing is easier.