That depends what's resting on it.
A square inch of lead because lead is more dense
Lead weighs more than steel, with lead having a density of approximately 708 pounds per cubic foot, while steel has a density of about 490 pounds per cubic foot. To convert these values to weight per square inch, lead weighs about 0.408 pounds per square inch, while steel weighs around 0.283 pounds per square inch. Therefore, lead weighs approximately 0.125 pounds more per square inch than steel.
-- 1 square inch weighs nothing, since its volume is zero. -- If the square inch is one end of a vertical column of water, then the column weighs about [ 5pounds 31/3ounces ] for each 12-ft of its height.
.032 Aluminum sheet typically weighs about .45lbs per square foot. Do one square inch would be 1/144th of that, or .003lbs. A little under 1/10th of an ounce
Steel is typically 490 lb/cubic foot. There are 1,728 square inches in a cubic foot which means that each cubic inch weighs about .284 pounds (just a bit over a quarter of a pound per square inch).
None. A square inch has no volume.
An area of 1 square inch!
One square inch
On average, concrete weighs about 12.5 pounds per square foot per inch thick. This can vary based on the type and density of the concrete mix.
A lead brick typically weighs around 28 pounds per square inch, depending on its dimensions and density.
1 square inch of ink.
On average, an inch of granite weighs around 12-13 pounds per square foot. This weight can vary slightly depending on the specific density and composition of the granite.