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Will stacking magnets together make them stronger?

Stacking magnets can make them stronger in some cases, but not always. It depends on the type of magnet and how it is stacked.

Two or more magnets stacked together will exhibit nearly the same strength as a single magnet of the combined size. This is because the magnetic field lines of the two magnets combine, resulting in a stronger overall field.

For example, if you stacked two 1/2 inch diameter x 1/4 inch thick disc magnets to make a 1/2 x 1/2 inch thick combined size, the two magnets would have nearly same strength as a single 1/2 x 1/2 inch magnet. 

Does that mean the strength is doubled?
We are often asked if stacking two magnets together will double the pull force. The answer to that is not always. In the example below, you can see how the pull force increases and eventually begins to level off as you continue to double the thickness.  

 


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