CalHub

Drywall Calculator

Calculate drywall sheets and screws from your total wall/ceiling area.

Sheets needed (sheets) 18
Screws (approx.) (screws) 576
Total cost ($) 0

Formula: sheets = area ÷ sheet size × (1 + waste)

Step-by-step with your numbers:
1. Values used:
2. Surface area = 500
3. Sheet size = 32
4. Waste = 10 %
5. Price per sheet = 0 $
6.
7. Sheets needed = 18sheets
8. Screws (approx.) = 576screws
9. Total cost = 0$
Did we solve your problem today?

Estimate the number of drywall (gypsum board) sheets and screws for a room. Measure all walls and ceilings you plan to cover and enter the total area.

The math behind it

Sheets = total area ÷ sheet area, rounded up, plus waste for cuts around doors/windows.

Screw estimate uses ~32 screws per sheet (16 in spacing on studs/joists).

Worked example

500 ft² with 4×8 ft sheets and 10% waste → 500 ÷ 32 × 1.10 = 18 sheets (≈576 screws).

FAQ

How far apart should drywall screws be?

About 16 in on walls and 12 in on ceilings, along each framing member.

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