Drywall and plaster calculators
Estimate materials for drywall, taping, and plastering. Choose a calculator below.
Planning an Interior Wall Project
Decide between drywall and plaster early — they have different installation processes, costs, and timelines. Drywall is faster and cheaper, making it the standard for most residential projects. Plaster provides a harder, more durable finish with better sound insulation but costs 2-3× more due to the skilled labor required. Choose based on your budget, timeline, and desired finish quality.
Order materials based on your square footage calculations plus 10% waste. Drywall sheets come in 4×8 ft and 4×12 ft sizes — 4×12 ft sheets are easier for ceilings since fewer seams means less taping. For plaster, buy the right type for your substrate: veneer plaster for drywall, three-coat plaster for lath, and one-coat systems for quick renovations.
Drywall and Plaster Guide
Drywall is the standard choice for most interior walls and ceilings, available in regular, moisture-resistant (green board), and fire-rated (Type X) varieties. Plaster provides a harder, more durable finish with better soundproofing but requires skilled application and more labor. Use drywall for most residential rooms and plaster for high-traffic areas or historical renovations where a traditional finish is desired.
Installation Tips
- Use 5/8-inch drywall for ceilings to prevent sagging
- Stagger drywall seams for a stronger finished wall
- Apply joint compound in thin coats, sanding between each
- Plaster requires a skilled application - consider hiring a professional for large areas