1. ## calculating a slanted box

well, my sealed box is slanted and i want to measure the interior. now, how do measure the slant on the back of the box? the rest of the box is all at 90 degree angles. i measured from the very top to the top at the back of the box, the middle and bottom the same way. as you go from top to bottom, the box gets longer in depth.

thx

2. ## Re: calculating a slanted box

Go here: http://www.the12volt.com/caraudio/boxcalcs.asp

They have a slated box volume calculator...

3. ## Re: calculating a slanted box

Take the opposite side's length, add it to to the slant length and divide by 2 to get a rough estimate. So for instance:

Slant side: 8"
Opoosite non slant side: 10"

8+10= 18/2 =9" use this as your measurement.

cu foott = 1728 cu inches

Thx!!!!!!

5. ## Re: calculating a slanted box

but its strange??? on bcae1.com and their calculator i get = 0.686 total volume

and with 12volt.com calculator, i get 0.73372

why? i enter these numbers:

thickness .75 < but dont need to use this number since i have the exact INSIDE dimensions

INSIDE:

width 10.5"
height 10.5"
depth 1 at top > 9.5"
depth 1 at bottom > 12"

now the bcae1.com calculator has the picture of the same way mine is designed, with 2 DEPTH measurements.

but 12volt.com doesnt have 2 DEPTH measuremnets, it says 2 HEIGHT measuremnets. i thought it would work out the same, just that one box is flipped around then the one on the bcae1.com site. its weird

6. ## Re: calculating a slanted box

can anyone guess whats wrong?

7. ## Re: calculating a slanted box

nothing, onlince calculators don't always use the same formulas.
So just pick one and stick wt it I say.

8. ## Re: calculating a slanted box

both if i get 2 different answers, how can i know which is more accurate?

9. ## Re: calculating a slanted box

find out the formula and do it ur self.

10. ## Re: calculating a slanted box

well thats what the calculator are there for. its just its strange getting 2 different answers when the calculator in both sites look the same

11. ## Re: calculating a slanted box

put ZERO in for wood thickness and use the internal dimensions

12. ## Re: calculating a slanted box

a triangle is half a rectangle.
measure the two right angle sides to make a rectangle and divide by 2.
use INTERNAL distances to get INTERNAL volume though!

13. ## Re: calculating a slanted box

Originally Posted by djman37
a triangle is half a rectangle.
measure the two right angle sides to make a rectangle and divide by 2.
use INTERNAL distances to get INTERNAL volume though!
Semantics!!! if its an equilatteral triangle its going to be a square!! or a rhombus if you wanna get crazy... or hell paralleogram fits the bill too!

14. ## Re: calculating a slanted box

got me. I should say, in his case. Use the calculator to find the volume of a box that is side 2 tall by side 3 minus side 1 wide by side 5 deep, then divide by 2 for the volume of the 'triangle part.' Add that to the volume of a box that is side 1 by side 2 by side 5 to get total.
1
___ ---------------
| \ | |
2 | \ 4 2| |
|------- ---------------
3 5

*edit* great. that looks like @ss when i post it!!!

15. ## Re: calculating a slanted box

(1/2) base * height * depth

All it is, is a triangle dude

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