Drywall is usually between 1/4 inch and 5/8 inch thick, with 1/2 inch being the standard thickness for most interior walls in modern homes.

Quick Scoop: How Thick Is Drywall?

For typical residential projects today, 1/2‑inch drywall is the “default” choice for most interior walls and many ceilings. But drywall actually comes in several thicknesses, each with its own job.

Common Drywall Thicknesses (Inches)

[8][4] [5][2][4][8] [7][9][2][4][5][8] [9][4][5][7][8] [4][7]
Thickness Typical Use
1/4 inch Curved walls, layering over old walls, very light covering.
3/8 inch Remodeling and patching, older partition walls.
1/2 inch Standard for most interior residential walls and many ceilings.
5/8 inch Thicker “standard” size; used for better soundproofing and fire resistance, often in ceilings or shared walls.
3/4 inch and thicker Special applications when specified by an engineer/architect, not common in typical homes.

Fast Answers to Common Situations

  • Interior walls in a typical house: usually 1/2 inch.
  • Ceilings in many homes: 1/2 inch, but 5/8 inch is often used to prevent sagging and to improve sound/fire performance.
  • Curved walls or resurfacing over old plaster: 1/4 inch, sometimes layered.
  • High‑noise or fire‑rated areas (like between units or around garages): often 5/8 inch type‑X or similar products.

A simple way to think about it: thinner sheets bend and cover, mid‑thickness (1/2 inch) handles normal rooms, and thicker sheets (5/8 inch and up) handle strength, sound, and fire where it matters most.

Information gathered from public forums or data available on the internet and portrayed here.