That measurement works in theory, but it does not match the true dimensions of the product. Using those measures there would be only 29 Pokémon cards per inch of thickness (1 ÷ 0.035 = 28.57). That means two booster packs should be almost 1 inch thick.
The actual number of Pokémon cards per inch is approximately 80. I own a game store, and we purchase bulk using measurements and that conversion factor. Fully compressed and in normal to low humidity conditions, 83 may be a more accurate number.