thick cardboard

when cutting thick cardboard that is on the backs of furniture like dressers and shit what is the best way to cut it? its about 1/8" thick but it is so hard to cut through. does anyone have a good way to do this? i want to cut out 3 squares in the back for fans but i found it extremely hard to even but off a strip of cardboard earlier

use a knife,

jig saw?........

i tried an exacto knife i had laying around and it didnt do anything its cardboard with a coat of plastic over it i cut the plastic but this had to bend it to break the cardboard and i cant really do that with squares. a jigsaw was what i wass thinking but i dont have money or room for it. i was also thinking about a drill or drimmel and using a drill bit to shape out the square or atleast get an initial hole in it first

a saw blade. Maybe even a serated knife . The kind you use to carve a turkey.

If its just cardboard, the solution is use more muscle

Make a starter hole with a drill if you need to, then just ram what ever cutting utensil in there.

haha i wish i had a electric turkey knife that would be easy haha alright looks like im just gonna have to use a knife and work at it for a while... haha it will be worth it tho

harden the fuck up and punch holes through it lol

haha cardboard, got the same problem, but just gunna get a hole saw from work

its not cardboard, its panelboard if its off the back of a piece of furniture, you can cut with a good sharp utility knife just keep scoring the same spot it will eventually cut through.

and you said you dont have room for a jigsaw, they arent that big, no bigger than a common drill. jigsaw would be your best solution, drill a hole in corners of square that you have pre markes on the panel board and just jigsaw or utility knife it

drywall knife

hm well it was that panelwood shit or whatever and i improvezed haha i forgot about that board and got some normal cardboard for easier workability
so i just cut a cardboard to fit the spot and now i am about to cut out the holes for fans. not sure if i should use one intake and one outtake or 2 outtake and one intake

Just put some muscle into it. I used a pocket knife to cut a hole through my closet door for my fan. To start a hole hammer the knife into the cardboard. It takes some time to finish, but if all you got is a knife it works.