Drywall screw size: which screw for your drywall

Last updated: July 13, 2026

Drywall screw size comes down to one thing: the board's thickness. The screw has to pass through the drywall and bite far enough into the stud behind it — about ¾" — to hold. Here's the size for each common drywall thickness, the right thread and head, and a chart you can print.

The short answer: for standard ½" drywall use 1¼" screws; for ⅝" drywall use 1⅝" screws. Use coarse-thread drywall screws in wood studs, fine-thread in metal studs. The chart below has every common size.

Size the screw to the drywall thickness

A drywall screw has to do two things: pass all the way through the drywall, and drive far enough into the framing behind it to hold. Standard practice is for the screw to reach about ¾" into the stud (⅝" is the accepted minimum). So the screw length is just the drywall thickness plus that penetration.

That gives the two sizes almost every job uses:

• ½" drywall → 1¼" screws. The everyday wall size — 1¼" leaves about ¾" biting into the stud.
• ⅝" drywall → 1⅝" screws. ⅝" board is the thicker, often fire-rated sheet (and common on ceilings); 1⅝" keeps a full ~1" in the framing.
• Double-layer or 1" of drywall → 2" screws. For two ½" layers (sound or fire assemblies), step up so you still reach the stud.

Thread: coarse for wood, fine for metal

Match the thread to the framing the screw drives into. Coarse-thread drywall screws have deep, widely spaced threads that grab wood studs firmly — that's what most homes have. Fine-thread screws have shallow, closely spaced threads made to cut and hold in thin metal studs, where a coarse thread would strip. If you're not sure, tap the wall: metal studs sound and feel different, and the screws pull to a magnet.

Head: bugle, driven just below flush

Drywall screws have a bugle head — a curved underside that self-countersinks, so the head sinks in and dimples the paper without tearing it. Drive each screw until the head sits just below the surface, denting the paper but not breaking it; a drywall-screw setter (dimpler) bit does this automatically. A torn paper face has almost no holding power, so don't overdrive.

Ceilings: a bit longer, a bit closer

Ceilings fight gravity, so they're less forgiving. Ceiling drywall is often the ⅝" board (stiffer, sags less), driven with 1⅝" screws, and fasteners are typically spaced a little closer than on walls. Follow your local code and the board manufacturer for spacing on ceilings and fire-rated assemblies — those are the cases where the general rule gives way to a spec.

Honest note: these are the standard, widely used sizes for typical residential drywall over wood or metal framing. Fire-rated assemblies, thicker multi-layer builds, and commercial work have their own screw and spacing specs — for those, follow local building code and the manufacturer's instructions.