More than likely you have 1/2" or 5/8" drywall. Remove one of your electrical outlet covers, you should be able to see the depth of the drywall in the gap next to the outlet box.
A 4x8 sheet is about 70 pounds.
A 4x8 is about 25 pounds - and very fragile.
One sheet of the new 'Light' 4x8 x 1/2 inch is about 32 pounds. The old one (probably still sold in some areas ) is 54 pounds.
It is used for archway ceilings or a archways in a hall. The general purpose of 1/4" is for any wall or surface that is not flat. Round walls, coved ceilings.
You must get the units to cancel out; for example 12 inch * 1 foot/12 inch the inch cancels and leaves the answer in feet which is 1.
The most common drywall thickness sizes available for installation are 1/4 inch, 3/8 inch, 1/2 inch, and 5/8 inch.
For interior walls you want to use 1/2 inch size drywall. You want to use the thicker drywall because its stronger and it's a lot harder to damage than the thinner drywall.
The standard drywall thickness for ceilings is typically 1/2 inch.
You use standard 1/2 inch drywall .
If the framing is wood, you use the #6 x 1-1/8 drywall screw. If the framing is metal, you can still use those screws, but I find it goes faster if I use #4 x 1 inch drill tippedscrews. About 50% more to buy (at Drywall warehouses) but they save lots of time.
Should be 1/4 inch or less.
take out the drywall (2 x 1/2") and you have 59"
1/2 inch is the standard.
You use 1/2 inch for ceilings
Preferably you cut and fit a patch of drywall. I always do that for holes and gaps over 1/2 inch.
The most common drywall thickness used in residential construction is 1/2 inch.
3 1/2 inches before drywall standard walls have 1/2 inch drywall so 4 1/2 inches for a standard wall