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for a rectangular box, its simply Lenght x Height x Width. If the dimensions you provided are exterior dimensions, then subtract 2x the material thickness from each dimension prior to multiplying.

So for your stuff its:

(16.5 - (2 * 0.75)) x (12.5 - (2 * 0.75)) x (16.5 - (2 * 0.75)) = cubic inches

Then you can take cubic inches and divide by 1728 to get cubic feet

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14y ago

What else can I help you with?