How many drywall sheets do I need?

Divide adjusted wall and ceiling area by sheet area, then round up with waste.

How much joint compound should I plan?

A rough planning rate is one 4.5-gallon bucket per 450-500 square feet of board.

Yes for planning. This calculator subtracts about 20 square feet per door and 15 per window.

Inputs

Change any field and the results update instantly. Use supplier specs when you have them.

Room lengthftRoom widthftWall heightftDoorsWindowsSheet widthftSheet lengthftWaste%Include ceiling

Tips & notes

Assumptions that most often change the final quantity in the field—so you order with clearer eyes.

Use 4x8 sheets for small rooms and 4x12 sheets where longer boards reduce seams.

Add waste for closets, soffits, stairwells, and cut-up rooms.

Moisture-resistant board belongs in baths, laundry rooms, and other damp areas.

Plan extra help or lifts for ceilings and long sheets.

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