Drywall Calculator

Estimate an area-based sheet allowance for walls and ceilings. Check a sheet layout before ordering, then add finishing materials from the product coverage.

Your measurements

Editable example

Use the unit on each label. You can also type feet and inches with ft and in, or the marks on your tape measure.

Room 1

Length (ft)Width (ft)Wall height (ft)Openings (sq ft)

Measure fromLength unitsChanges the dimensions labeled ft or m without a fixed unit. Thickness, openings and package sizes keep the inches, square feet, cubic feet and gallons shown on their labels.SurfacesExtra for cuts (%)

Sheet size and finishing materials

Sheet length (ft)Sheet width (ft)Measured joints to tape (ft)Tape roll length (ft)Compound coverage per container (sq ft)Screws per sheet from layoutYour price per sheet ($)Layers from accepted assemblySheet orientation noteCorners needing bead (ft)Usable corner bead per piece (ft)

Example: replace these measurements

Area-based sheet allowance

13 drywall sheets by area

352 sq ft measured

Shopping list & save options

Surface area: 352 sq ft
Sheet size: 4 × 8 ft
Tape rolls: Enter joint and roll lengths
Compound containers: Enter product coverage
Screws: Enter the fastening schedule
Sheet subtotal: Add your price
Corner-bead pieces: Enter both measurements
Sheet orientation to review: horizontal

Area estimate only. Check sheet orientation and joint locations against the framing before ordering.

Room dimensions and a schematic door opening. Subtract measured openings. Include the ceiling only when you select it.

The calculation

Surface area: 352 sq ft
ceil(352 × (1 + 10/100) ÷ 32) = 13
Single-layer sheet allowance × 1 layers = 13 sheets.

Material price trends, separate from your quote

These U.S. producer indexes track material prices over time. They are not store prices, labor rates or local installed costs. We do not use them to increase a historical project median.

Gypsum products

+0.2% from August 2025 to August 2026. Latest observation is preliminary and may be revised.

BLS producer index, not seasonally adjusted
Period	Index level, not dollars
August 2025	484.016
August 2026	484.844

U.S. Bureau of Labor Statistics · Updated 2026-09-20. Use your quoted unit price in the material calculator; delivery, tax, preparation and labor remain separate.

Plan the work as well as the order: Drywall installation, finishing & repair planning.

Before ordering, use the drywall measurement, materials & finish scope guide to check the inputs and take the right questions to the supplier. Choose another calculator.

How to plan the quantity

Walls use perimeter times room height. Select the ceiling to add its length times width. Openings subtract area, but small cutouts may not reduce the actual number of sheets.

The sheet count is an area estimate with your allowance. Plan board orientation and joint locations against the framing before using it as an order. A narrow offcut cannot necessarily finish another wall.

Tape is based on measured joint length. Compound coverage and screw counts are inputs from the product and fastening layout, not hidden per-room constants.

Before you order

This does not set fire rating, board thickness, wet-area suitability, finish level or fastener spacing.
Count corner bead, access panels and backing separately. Texture matching and repainting belong in a repair quote.