How much drywall does a bathroom need?
The room
Openings
21 sq ft each
15 sq ft each
A linen closet you are not boarding, an archway. Anything under a couple of square feet is not worth deducting.
Sheet size
Thickness
Green board. Damp rooms only — not inside a shower or a steam enclosure.
Waste is 15%, 0 outside corners. Defaults are fine for most rooms.
Room plan
shape only, not to scale
You need
8sheets
4 × 8 ft · 1/2 in MR · 15% waste
wallboardcalc.com
Materials
$182
at your prices
- Walls
- 208 sq ft
- Ceiling
- 40 sq ft
- Openings
- −36 sq ft
- Net area to board
- 212 sq ft
- Sheets before waste
- 7 → 8
- Weight to carry
- 466 lb
What to put in the cart
Finishing follows the manufacturer coverage rates: 10 gal of mud and 370 ft of tape per 1,000 sq ft.
- 1$147
8 × 4 × 8 ft 1/2 in MR drywall sheets
- 2$9
1 × 1 lb box of 1-1/4 in drywall screws (about 195 screws)
- 3$7
1 × 250 ft roll of paper joint tape (79 ft needed)
- 4$19
1 × 4.5 gal pail of all-purpose joint compound (2.1 gal needed)
The whole setup lives in the link — send it to whoever is helping.