Will stacking magnets together make them stronger?

Yes, stacking multiple magnets together can make them stronger. Two or more magnets stacked together will exhibit nearly the same strength of a single magnet of the combined size. For example, if you stacked two 1/2 x 1/4 inch thick disc magnets to make a 1/2 x 1/2 inch combined size, the two magnets would have nearly same strength as a single 1/2 x 1/2 inch magnet.