How many drywall sheets do I need?

Add each room's length, width and ceiling height. The calculator sums wall and ceiling area, applies a waste allowance, and returns the number of sheets to buy in your chosen size, broken down per room for delivery.

What size drywall sheet should I use?

It shows the sheet count for 4x8, 4x9, 4x10 and 4x12 and flags the size with the fewest sheets. Bigger sheets mean fewer seams to tape, but they are heavier to handle.

Does it calculate screws, tape and mud?

Yes. From the same rooms it estimates drywall screws, joint tape and joint compound, and adjusts the mud for a Level 4 or Level 5 finish.

SCOPE LOGIC

Free contractor tools

Free Drywall Calculator

Add your rooms — one, or a whole basement — and get sheets, screws, tape and mud in seconds, plus the smartest sheet size to cut down your seams. No sign-up.

Runs on the same estimating engine ScopeLogic uses to price real jobs.

Drywall take-off — 2 rooms

Your rooms

Finish level

Waste Default 10%

Standard rooms run 8–10% waste; lots of cuts, closets or vaulted ceilings run higher. Small doors and windows are absorbed into the waste — we only net out openings bigger than a full sheet.

Drywall sheets to buy

—4×8 sheets

Pick your sheet size — bigger = fewer seams to tape

Per room — stock your delivery

How we got this

Source: wall = perimeter × height, ceiling = floor area (deduct only openings > 32 SF) · ~32 screws/wall & 36/ceiling sheet · ~10.5 LF tape/sheet · mud ≈ 2 × 4.5-gal pails per 1,000 SF (Level 4) · fastening per GA-216 / ASTM C840.

Board type is a code call, not preference — use Type-X 5/8″ on garages & garage ceilings, moisture-resistant board in bathrooms. Big windows or raking light? Spec Level 5. We count the sheets; set the type per room to code.

Free calculator — no sign-up. Sheets are 4 ft wide, standard in Canada & the U.S. Powered by ScopeLogic.

Sheets are just the start

Hanging is half the job. The finish is where the money is.

You've got sheets, screws, tape and mud. But a real bid also has to price two separate crews — the hangers and the tapers — plus your markup. That's the part that decides if the job makes money.

Your numbers, grown up

The same take-off, turned into a bid you'd actually send.

In ScopeLogic your rooms flow straight into a full estimate — board, fasteners, finishing, and hang + finish labour as two lines — and come out as a clean proposal your client approves and pays online.

Estimate — Basement drywallExample

Line item	Qty	Unit	Your price
1/2″ drywall, 4×12 sheetsfrom calculator	29	sheets	$493
Screws, tape & joint compound	1	lot	$168
Hang — labour (2-person)	24	hr	$1,320
Tape & finish to Level 4 — labour	30	hr	$1,650
Client proposal total			$3,631

Your cost and markup stay private — the client only ever sees the price.

Want the whole takeoff & estimating platform — not just the calculator? Try ScopeLogic free for 7 days →

Start free →

Free for 7 days — no charge today. Cancel anytime. Solo $39 · Crew $69 · Pro $99 /mo after trial.