Sheet counts are the first thing you need when planning a drywall job — for the order, for the delivery, and for the budget. This chart gives them by room size: how many sheets the walls take, and how many if the ceiling is included, in both standard sheet sizes.
The assumptions, stated plainly: rectangular rooms with 8 ft ceilings, and no subtraction for doors and windows. That is deliberate — openings are usually covered by pieces cut from full sheets anyway, and leaving them in gives every room a small built-in cutting allowance. Exact areas are divided by the sheet size and rounded up, because partial sheets are still bought whole.
Drywall sheet chart by room size
| Room size | Wall area | Walls only — 4 × 8 | Walls only — 4 × 12 | Walls + ceiling — 4 × 8 | Walls + ceiling — 4 × 12 |
|---|---|---|---|---|---|
| 8 × 10 ft | 288 sq ft | 9 | 6 | 12 | 8 |
| 10 × 10 ft | 320 sq ft | 10 | 7 | 14 | 9 |
| 10 × 12 ft | 352 sq ft | 11 | 8 | 15 | 10 |
| 12 × 12 ft | 384 sq ft | 12 | 8 | 17 | 11 |
| 12 × 16 ft | 448 sq ft | 14 | 10 | 20 | 14 |
| 16 × 20 ft | 576 sq ft | 18 | 12 | 28 | 19 |
How to read this chart
The math behind every cell is one line: sheets = area to cover ÷ sheet area, rounded up — a 4 × 8 ft sheet covers 32 sq ft and a 4 × 12 ft sheet covers 48 sq ft. Wall area is the room’s perimeter times its ceiling height; the “walls + ceiling” columns add the floor footprint (length × width) on top.
- Between sizes? Areas scale smoothly: work out your wall area (perimeter × height) and divide by 32 or 48, rounding up — or use the calculator below.
- Openings: a standard door is about 21 sq ft — less than one sheet — so subtracting openings lowers the count by at most a sheet in most rooms. The chart keeps that material as cutting allowance instead.
- Spares: add one or two sheets to any order. Sheets get damaged in delivery and handling, and a spare is cheaper than a second trip.
- Sheet size choice: 4 × 12 sheets mean roughly a third fewer seams to tape, but at about 75 lb each they are harder to move and may not turn a stairwell corner. The count is not the only variable.
Run your exact numbers
Our Drywall Calculator takes any area — your measured walls, an L-shaped room, a garage — and returns the count for both sheet sizes, with the same rounding used here.
FAQ
What if my ceilings are 9 ft instead of 8 ft?
Scale the wall area by 9 ÷ 8. A 12 × 12 ft room’s walls become 432 sq ft, which is 14 sheets of 4 × 8 or 9 sheets of 4 × 12 (walls only). Ceiling figures do not change — the ceiling is the same size whatever its height.
Does the chart include waste?
Only the waste built into rounding up and leaving openings in. That covers normal cutting in rectangular rooms. For rooms with many angles, or first-time hangers, add the one or two spare sheets mentioned above.
How many sheets for a 12 × 12 room?
Walls only: 12 sheets of 4 × 8, or 8 of 4 × 12. Walls and ceiling together: 17 sheets of 4 × 8, or 11 of 4 × 12. Those are the chart’s middle row — and the most commonly looked-up room on this page.
Are 5/8 in sheets counted differently?
No. Thickness changes weight, price, and fire rating — not coverage. A 4 × 8 sheet covers 32 sq ft at any thickness, so every count in this chart holds for 5/8 in type X board as well.
From count to budget
To see a sheet count carried through a complete materials budget — compound, tape, screws, and totals — read Cost to Drywall a Basement Room: Materials & Cost, which prices the 12 × 16 ft row of this chart as a real project. Our How We Calculate page explains how we source and test the figures behind charts like this one.
Estimates only: quantities come from the standard formulas shown on this page and prices are typical US ranges checked November 2026; your costs vary by region, store, and product. Confirm measurements and prices before buying. This page estimates materials for common DIY projects; it does not cover structural, load-bearing, electrical, gas, or plumbing design — for safety-critical work, hire a licensed professional.