The rough opening width for a 24" door is 26-1/2"
The rough opening height for a 24" door is 26-5/8" Rough openings are 2" wider and 2-1/2" taller than the actual door. This allows room for the door frame and adjustment.
The recommended rough opening size for a 30 by 80 inch door is 32 by 82 inches.
The rough opening required for a 30-inch door is typically 32 inches in width and 82 inches in height.
The recommended rough opening size for a 30-inch door is 32 inches in width and 82 inches in height.
The recommended rough opening size for a 34-inch door is 38 inches in width and 82 inches in height.
The recommended rough opening size for a 24-inch door is 26 inches in width and 82 inches in height.
The recommended rough opening size for a 28-inch door is 30 inches in width and 82 inches in height.
The recommended rough opening size for a 30-inch interior door is 32 inches in width and 82 inches in height.
The standard rough opening size required for a 30-inch door is 32 inches in width and 82 inches in height.
The standard rough opening size required for a 24-inch door is 26 inches in width and 82 inches in height.
The standard rough opening size required for installing a 30-inch interior door is 32 inches in width and 82 inches in height.
Add two inches to height and width. So a 36 x 80 door roughed out is 38 x82. This is with doors only. Windows you add 1 inch to the height and width.
Rough opening requirements vary by door manufacturer. It would be best to check with the lumberyard where you plan to purchase the door, but if you've got to get it framed now, make it 38-1/2" wide, and 6'-11" high. You can always build it in later if necessary.