How many drywall sheets for a 12x12 room?

A 12x12 room with 8 ft ceilings needs roughly 14–16 sheets depending on doors and windows. Enter your exact wall dimensions for sheets, mud and tape.

How much joint compound per drywall sheet?

Plan about one 5-gallon bucket per 12–15 sheets for a standard tape-and-finish job.

Drywall Sheet & Mud Counter — Guided Drywall Calculator

What are you covering?

Walls, ceiling, or the whole room — pick one.

Walls only Ceiling is already done or staying as-is Ceiling only Just the lid — no walls, no openings Walls + ceiling The whole room, top to bottom

Tell me about the room

Measure wall to wall — not the floor area, the surfaces you're covering.

Length (ft)

Width (ft)

Ceiling height (ft)

Floor to ceiling — this is the #1 number people guess wrong.

Doors

Windows

We subtract ~21 ft² per door and ~15 ft² per window so you don't overbuy.

Pick your sheet size

Bigger sheets = fewer seams = less taping. If they'll fit through the door, go big.

4 × 8 ft sheets 32 ft² each — easiest to handle solo 4 × 10 ft sheets 40 ft² each — fewer butt joints 4 × 12 ft sheets 48 ft² each — pro pick for long walls

Your drywall count

Buy this many sheets

–

Net area: –
Exact sheets: –
Joint compound: –
Tape + screws: –

💡 Pro field tips

🧰 Tools you'll need

Tap to check off as you load up.

Est. project cost (optional)

Price per sheet ($)

Price per mud bucket ($)

Labor hours

Labor rate ($/hr)

Save to job log (optional)

File this estimate under a job name or PO to track what to order. Leave blank to file under "General".