Two-story house floor plan showing rooms including bedrooms, bathrooms, kitchen, living, dining, family room, and garage.
3D floor plan view of two-story house layout with multiple rooms and staircases visible.

Drywall calculator

Enter your room size. We'll tell you how many sheets of drywall to buy and what hanging and finishing costs near you.

Your estimate is only as good as your measurements.

Skip the tape measure.

Every calculator relies on the numbers you enter manually. Scan the room with your phone using Polycam and get exact dimensions and floor plans within minutes.

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$9k in hardware savings per user
FAQ

Questions, answered

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How many sheets of drywall do I need for a room?

Add up the wall area (perimeter × ceiling height) and the ceiling area, then divide by the area of one sheet: 32 sq ft for 4 × 8, 48 sq ft for 4 × 12. Add 10–15% for cuts. A 12 × 12 ft room with 8 ft ceilings needs about 19–20 sheets of 4 × 8.

Should I subtract doors and windows from my drywall estimate?

Only for large openings, like garage doors, wide patio doors or picture windows. Pros often leave standard doors and windows in, because the cutouts become offcuts and waste anyway. A Polycam scan records every opening's size, so you can decide with real numbers.

How much does it cost to hang and finish drywall?

Cost depends on your region, sheet type (standard, moisture-resistant or fire-rated) and the finish level you want. The calculator estimates hanging and finishing costs for your location. Higher finish levels for smooth or painted walls cost more.

What does Polycam measure when I scan a room for drywall?

A scan captures interior and exterior dimensions, wall, window and door openings, room labels, furniture and fixtures. Multi-floor layouts come out as labeled 2D and 3D plans, with the wall areas and openings a drywall takeoff needs.

How accurate are Polycam's measurements for a drywall takeoff?

Standard interior captures are accurate to within about half an inch. Space complexity, scan coverage and your device can widen that tolerance, so review dimensions on site and correct anything before you export.

What does Polycam's Business plan include?

Floor plan exports, advanced measure tools, a shared team library, point cloud exports, virtual walkthroughs and AI-generated reports, on top of the basic features. Business starts with a free 7-day trial.

Which exports can I use for drywall estimating?

Floor plan exports (PDF, PNG, SVG, DXF and CSV) are on Business and above, with point cloud exports (PLY, LAS, geo-referenced LAS, PTS, XYZ and DXF) and the Spatial Report as a PDF. 3D model exports (OBJ, DAE, FBX, GLTF, STL and USDZ) start on Basic.