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There is no "formula for square inches". However, there is a formula for area in "square inches"... Actually, there are several:
Quoting (slightly modified for readability) the website: http://www.math.com/tables/geometry/areas.htm (my notes in square brackets ("[" and "]")
Area Formulas
Note: [In the following] "a*b" means "a" multiplied by "b". "a^2" means "a squared", which is the same as "a" times "a".
Be careful!! Units count. Use the same units for all measurements. Examples
[In answer to this question, all units should be in inches.]
square = a^2
rectangle = a*b 
parallelogram = b*h 
trapezoid = h/2 (b1 + b2) 
circle = pi*r^2 
ellipse = pi*r1*r2 
triangle = 1/2(b*h) 
(one half times the base length times the height of the triangle)
equilateral triangle = [image] 
--
triangle given SAS (two sides and the opposite angle) = (1/2)* a*b*(sin C)
triangle given a,b,c = sqrt[s(s-a)(s-b)(s-c)] when s = (a+b+c)/2 (Heron's formula)
regular polygon = (1/2)*n*sin(360°/n) S2 when n = # of sides and S = length from center to a corner
--
[Page also has a discussion about units]
by Brian I on March 1st, 2010
There is no single formula for square inches, it would depend upon the area that you wanted to measure. In the case of a square or rectangle it would be the width expressed in inches multiplied by the length expressed in inches.
In the case of a triangle it would be the base multiplied by the height divided by 2, and in the case of a circle it would be pi multiplied by the radius squared.
Of course, most of the world no longer uses the imperial system of measurement, but uses the metric system, which is much easier than all those inches, feet and yards.
by purplecows on February 11th, 2010
one-half times the base times the height of a triangle
by GeorgeGee left Answerbag (What's this?) on May 24th, 2010
Ha ha, you retarded assholes are still keeping as the "Great Answer" a totally incorrect answer. The question didn't ask the area of a rectangle, try READING the damned question instead of just answering a different one.
The only formula for square inches, as asked in the question is that Number of square inches = Number of square inches. What a retarded question. Go back to grade school and try paying attention next time.
by purplecows on March 1st, 2010
pi times radius squared....for a circle.
by SupErChiCk on March 1st, 2010
umm do you mean area?? cause its length times width....there is no formula for square inches...
by Jahono on March 1st, 2010
THe same equation used to find area.
by purplecows on February 11th, 2010
square feet divided by 144
The area of a rectangle is equal to one side multiplied by the other side. This is measured as square inches, or inches squared. The area of a square that has two five-inch sides is 25 square inches (5x5=25).Source
by GeorgeGee left Answerbag (What's this?) on May 4th, 2010
This is of course a stupid and poorly crafted question given that it's coming from "Answerbag Staff." However the only correct answer to this question is: The formula for square inches is (Area expressed in square inches) divided by (1 square inch) which yields the number of square inches of area. Pointless? Certainly. Accurate? yes. Want a better answer? Ask a better question.
by purplecows on March 3rd, 2010
Find a square, and measure how many inches he's got.
by Marky Mark on January 10th, 2010
X inches in length multiplied by Y inches in breadth....for a rectangle.
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Comments
NOTE: The image for the square is
It should have been above. But finding out how to show those as they were on the page (had to use div statements) took the time I had to edit the question, and I didn't notice it missing until it was too late. :-P
by BigDaddyBS on July 11th, 2010
I'm not even sure how you made those images in your comments. please tell! x3
by Mr.Wolf aka Nicholas_1007 is back! =D on April 25th, 2011
HTML image tag is & lt; img src="http ://siteimageishosted .dom/subfolder/image.ext" alt="name of image or null" /" & gt; [NOTE: Spaces in URL should NOT exist. Also angle brackets (greater than sign and less than sign) should be used in place of the "& gt;" and "& lt;".
I just put them there so 1) the link wouldn't work, 2) the image tag wouldn't work, and the whole comment wouldn't be screwed up. I also used the HTML "& lt;" and "& gt;" for the tag ends.
I just put them inline with my paragraphs.
by BigDaddyBS on April 26th, 2011
Can I get some insight as to why you people ask/answer these sub-kindergarten level questions?
by WarHorseLeBron on October 23rd, 2011
So, you are saying you learned to calculate square footage (or inches or yards or metres or whatever) BEFORE kindergarten? AMAZING.
No wonder our kids are so messed up, considering WE learned this calculation in maybe 4th-6th grade. I mean, I think the problem now-a-days is we are DEMANDING that our kids learn and in some cases mature too quickly.
Oh... And we answer questions to help - The questioner, AB, and future people looking for answers to the same or similar questions - Grade-level of the question be damned.
You DO have to remember that AB is world-wide, and while you are thinking this question is simple, in some places - and for some people - it isn't. Some questions ARE difficult until you hit that epiphanous thought about it, and suddenly can understand. For some, it happens easily. For others, it's much more difficult.
by BigDaddyBS on October 23rd, 2011
ok I get that some kids don't know this stuff...but its probably because the question-worded how it is-doesn't make much sense. I see Answerbag ask questions like this all the time. I've seen them ask "how many square are in an inch" and many questions like that. I consider these kinds of questions nonsensical and I'm sure AB staff knows that they are yet they ask them all the time. Is it the aim of AB to confuse people? Confusing people with questions that make little sense does NOT help kids learn. If I asked a first grader if "8+7 = 2" he rack his brain trying to justify something that just doesn't make sense. Its deconstructive.
by WarHorseLeBron on October 23rd, 2011
If AB has asked a nonsense question, or answered a question incorrectly, and you find it, you should report it to the staff. Use the form here: http://www.answerbag.com/contact-us/ . Be sure you have the URL of the question, or the permalink (or URL) of the answer, and explain why you believe it wrong or nonsense. They will either correct it, remove it, or may not do anything, but at least you've tried, right?
by BigDaddyBS on October 24th, 2011
Well what I want to know is why AB asks those questions. Look at this one for example.
http://www.answerbag.com/q_view/2497710
Please tell me that a robot is asking this question.
by WarHorseLeBron on October 24th, 2011
It might possibly be - If so, they have written one to hit other sites (probably not other known question sites like Y!A) and find questions that are not similar to (supposedly) other questions on AB. Then they get professional writers to research and answer (with links to sources). The idea being to help fill AB with questions and answers that can be found by people when they are searching for those type answers.
Another way AB questions occur is that the staff themselves ask, or search for, questions out there in internetland. THEN they have the "pros" answer them.
VERY few people who have been here for some time pay too much attention to them, as most believe that AB was doing well without them doing this.
AB was originally designed as an FAQ resource. People started asking questions to those who wrote those FAQs, and it was redesigned as a Q&A site (built before Y!A, BTW). For years only those questions asked by others, and a few FAQ-type Q&As were here. Now, they're trying to build up the DB so even more people are drawn to the site. (I started by answering questions about Music in Commercials. I answered a few questions with fun answers, and some relationship questions very seriously, and people noticed. That made me feel good, and I started doing AB much more. That seems to be what they are trying to do. They also added the social aspect with comments, and now forums. They try to keep us updated on things via the blog. They also allow questions to be sent to Twitter and to Facebook, now. (Twitter's limitation of 140 characters is why questions are limited to ... 140 characters. ;-) )
I hope that's helped. If they bother you, just ignore them. If you think your answer is better than the professionally researched answer, and you have your sources listed, there's a topic in the forums for you to point out errors in the PRAs, and to point out the best answer - even if it's yours. It may take some time to become an "Asker's Pick", but sooner or later it will, as this one did. ;-)
by BigDaddyBS on October 25th, 2011
I appreciate the explanation. Thanks.
by WarHorseLeBron on October 25th, 2011