avoinvents

Hi all, Can anyone here please help me understand how to convert weight into pressure? I have two mats filled with air both connected to indecent air pressure sensors. One mat has a surface area of 12”x 12” and the other mat has a surface of 24” x 24”. I won’t to apply a small AA battery which has a weight of 10grams to both mats. Even though one mat has a bigger surface area than the other, would the pressure exerted by the 10 gram weight me the same? Please see picture to help understand where I am coming from: http://i719.photobucket.com/albums/ww191/avoinvents/weighttopressure.jpg Thank you all in advance.