PDA

View Full Version : how do you calculate sq ft for a box

12-17-2008, 07:50 PM
i know its dumb to ask but how do you calculate the airspace for a box for instance if you have room for a box 44in long 24in deep and 18in tall?
thanks!

DBBOOM
12-17-2008, 08:04 PM
http://www.carstereo.com/help/Articles.cfm?id=31 This will get you to the section, might have to find the page.

DonH
12-17-2008, 08:09 PM
not quite shure what the question is here but why do u wan 2 know the sq footage? u want to know if u need 2 buy one or two boards of mdf? etc... elaborate please!

12-17-2008, 08:17 PM
i was just trying to figure the volume of the box, and going by this method

FIGURE 2 - How to Calculate Internal Box Volume

Area (rectangle) = Length x Width

Volume (rectangular box) = Area (of one side) x Depth

1728 Cubic Inches = 1 Cubic Foot
28 Liters = 1 Cubic Foot

the box with the dimensions i mentioned above would have a total vol of 11 cubic feet right?
that doesnt seem right at all!

Johnny Law.Lulz
12-17-2008, 08:20 PM

DonH
12-17-2008, 08:22 PM
i was just trying to figure the volume of the box, and going by this method

FIGURE 2 - How to Calculate Internal Box Volume

Area (rectangle) = Length x Width

Volume (rectangular box) = Area (of one side) x Depth

1728 Cubic Inches = 1 Cubic Foot
28 Liters = 1 Cubic Foot

the box with the dimensions i mentioned above would have a total vol of 11 cubic feet right?
that doesnt seem right at all!

no it wouldn't. it mean that a box that is 44x18x24 and 3/4" wood would mean that u would have 9.13ft^3

DBBOOM
12-17-2008, 08:22 PM
length x width x height / 1728 = cubic foot

12-17-2008, 08:25 PM

thanks according to it that box would be 8.32 cubic ft and i only need like 6.5

DonH
12-17-2008, 08:30 PM
thanks according to it that box would be 8.32 cubic ft and i only need like 6.5

u shure that 8.32? u putn thoze #'s in correct?

DonH
12-17-2008, 08:32 PM
n e ways go with a box like diz:

H=18
w=44
D=18

thats 6.7 ft^3

12-17-2008, 08:40 PM
n e ways go with a box like diz:

H=18
w=44
D=18

thats 6.7 ft^3

ya, the back of the box will have a angle slant to sit flush up ahainst my rear seats so i figure that will drop a little of the volume. so with

W=44
H=18
bottem D=20
top D=16
i should still be at the 6.7 mark.

now all i hafta figure out is what size port to put in firing upwards to make it sound right!

DonH
12-17-2008, 08:47 PM
ya, the back of the box will have a angle slant to sit flush up ahainst my rear seats so i figure that will drop a little of the volume. so with

W=44
H=18
bottem D=20
top D=16
i should still be at the 6.7 mark.

now all i hafta figure out is what size port to put in firing upwards to make it sound right!

wut kinda drivers? go with aeros! trust! 4 4"! made a box yesterday for the homie and they are nice and easy!

12-17-2008, 08:49 PM
wut kinda drivers? go with aeros! trust! 4 4"! made a box yesterday for the homie and they are nice and easy!

it will be 3 kicker cvx 12s with 1500.1 on them, i may drop the size to 6.25 but i want to stay in between that and 6.75

DonH
12-17-2008, 08:52 PM
it will be 3 kicker cvx 12s with 1500.1 on them, i may drop the size to 6.25 but i want to stay in between that and 6.75

go with 6.25!

12-17-2008, 08:55 PM
go with 6.25!

y do you say that?

an i figure if i do like 6.5 with the magnets facing in the box it will take up some airspace and make it close to 6.25

ngsm13
12-17-2008, 08:57 PM
Hmmm, there's not a sticky at the top of this section about box design or anything...

nG

12-17-2008, 09:02 PM
Hmmm, there's not a sticky at the top of this section about box design or anything...

nG

ya i read through them, i didnt c exactly what i needed. hope you dont mind. . .lol

DonH
12-17-2008, 09:03 PM
y do you say that?

an i figure if i do like 6.5 with the magnets facing in the box it will take up some airspace and make it close to 6.25

meh just cuz i liked 2 haha! hey im drawing up a design 4 you in sketchup right now the ports will b in the design as well.