What is the rough framing dimension for a 30 inch door?

32-1/2 inches.The rough framing should be 2-1/2 inches wider than the door itself. That leaves room for the 3/4 inch finish frame on each side of the door, and then 1/2 inch on each side for the shims between the finish frame and the rough frame.There are some tricks for building frames into new walls that are usually built on the floor and lifted into place.  -- Remember that there are always two studs on each side of the door for strength. -- When building the frame on the floor, install the top and bottom piece of the wall and only the outer studs, the King Stud, for the wall -- now with a door+5

1500 Series Pocket Door Frames, , Sliding, Folding

Rough Opening Sizes for Commercial Door Frames

Rough Opening Sizes for Commercial Door Frames

What is the rough opening for a 30-inch door? - Quora

Rough Openings : Timely Industries

Framing a Door's Rough Opening

ARK DESIGN 30 in. x 80.5 in. 4-Lite Tempered Frosted Glass Solid Core White Finished Composite Bi-fold Door with Hardware Kit WT-BF-G-4L-30 - The Home Depot

Measuring for a Larson Storm Door – Reeb Learning Center

Measurement Charts– Murphy Door

Actual Window Sizes vs. Call Sizes