Before we uncover how many pennies can fit in one square foot, we need to ask some questions...

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any minimum an are required in between pennies?what pattern?are over there sides to the square foot and also no penny deserve to overlap any type of edge?other

Let"s begin with a piece of cardboard that actions 12 by 12 inches, which is precisely 1 SF. Together you can see in the pictures, the tape measure reflects we have actually 12 in. On both sides, also though it may be hard to check out the tiny numbers.



We begin placing pennies ~ above the leaf of this 12 in. Cardboard and it outcomes in a perfect fit: 16 pennies next to each various other measure precisely 12 inches (one foot) since the diameter the a penny is .75 in. (or 3/4 of one inch).

By the way, as you deserve to see, we provided all brand brand-new pennies because that this demonstration.

1 SF cardboard and also 16 pennies top top its edge

Simple math have the right to tell us just how many pennies to the right in one square foot in this directly pattern (16x16=256) without actually filling the square cardboard with pennies. We made decision to execute it still in bespeak to present other details and also for you to see how beautiful the looks. Here us go, including row after heat of 16 pennies each. 

Worth mentioning below is the the pennies execute touch each other. If a gap/space is forced all about each penny, say for grout, changes must it is in made.   

Slowly including up pennies...

So, how numerous pennies have the right to fit in one square foot?256 pennies per square foot if the rows space straight

No penny overlaps any kind of edge and also there"s no an are left whatsoever - at least that"s what math tells us. If you see slight imperfections in the snapshot below is due to the fact that we inserted all 256 pennies by hand and also they are simply sitting there, no glued.

If a penny was square shaped rather of round, through a .75 in. Side, the cardboard below would be totally covered by 256 square pennies. But since the penny is round, you can see the cardboard in between pennies.

Notice the empty area between any 4 pennies is quite huge and has actually 4 rounded sides (more on this later).After carefully placing every coin by hand, here it is: 16 rows of 16 pennies each.

16 pennies per directly row x 16 rows = 256 pennies

Here"s a close-up top top a edge of the square cardboard. Also though the pennies space in call with every other, there"s still quite some room in in between them and also that"s as result of the straight rows pattern/layout. 

Close-up on directly rows that pennies

And here"s another view that the very same 256 brand brand-new shiny pennies sitting in directly rows ~ above a specifically one square foot cardboard.

256 brand new pennies on a 1 SF area
How many pennies can fit in 1 sq. Ft. If we change the sample to staggered/offset rows?

The very first row that 16 pennies continues to be the same and we move the second row to the appropriate by fifty percent a penny. Climate we can also push up (as girlfriend look in ~ the picture) the whole 2nd row till it touch the first row that pennies.

We"ll press every even numbered heat (2nd, 4th, 6th, ...) come the right by half a penny and also then the totality row up a little to touch the ahead row. Through every row moved up a little, us should obtain some room at the bottom the the cardboard.

Beginning that offset/staggered rows the pennies

Here"s much more of a visual: advertise a row by fifty percent a penny (A) results in half a coin overlapping the leaf of our square foot (B). 

Overlapping can"t take place if your precise one square foot (SF) project has sides/walls choose a tray. And for enlarge projects, every SF of pennies have the right to overlap top top the following SF till you reach the finish side of her project and cannot fit one more full penny anymore.

So, pushing 8 rows come the best by fifty percent a penny and then up a little, ours 16 initial rows of pennies gained "squeezed upwards" closer together and also revealed fairly the extra room (C) at the bottom of the cardboard.

Can we fit 2 an ext rows the pennies there? We sure can. Not only that however there will certainly be a little bit of room left after that which we"re not going to (mathematically) obtain into, yet some an ext "slices of pennies" will fit in the little room left below. 

There we have actually the 2 extra rows that pennies (above) and room left for "16 slices that pennies" aligned through the cardboard"s bottom edge.

How about the height side the the cardboard? an additional 16 super tiny "slices that pennies" will certainly fit in there, aligned through the edge, to do our square foot... Full.

And the overlapping pennies on the appropriate side, compensate for the empty spaces top top the left, for this reason no much more explanation needed here.

Easy math gives us the total variety of whole pennies (18x16=288) plus some 16 "slices of pennies" at the bottom of cardboard and also another 16 tiny slices in ~ the top.

The topic of "How many whole pennies are in the 32 slices" can be the title of a brand-new article i beg your pardon is past the objective of this page. However if you"re a genius mathematician who desires to offer it a shot, let united state know and we"ll publish your article and give you the credit.

A fast eyeballing claims that the 32 slices can comprise for around 6-8 pennies yet let"s wait for Einstein"s confirmation.

Here"s the humble conclusion...

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Pennies every square foot (sf) in offset pattern:288 plus about 6-8 pennies "sliced" at height & bottom that cardboardThe complete could be 294-296 pennies every SF

What if your perfect square foot was a tray (or similar) through edges/sides which don"t allow pennies come overlap... Like the 9 pennies do in the above or below picture.

So what then? Someone may say "let"s reduced the 9 overlapping pennies in fifty percent and fill the left side with the 9 halves". We totally advise against cutting pennies. Simply, not incorporate the 9 overlapping pennies and also the ideal side will certainly be identical to the left.

Also, slide the totality thing under so the top and also bottom will have identical spaces to the edge of the square foot. Pennies per SF is 279 in this instance (288-9=279).