How this calculator works
This runs our stud and drywall calculators on one wall. Studs are the length divided by the spacing plus one, plus extras for corners, doors and windows and a few spares. Plates are one on the bottom and two on top. Drywall is the wall area for each side you finish, with 10% waste, and screws, tape and compound follow from the area.
Worked example: a 20 ft wall, 8 ft high, with studs at 16 inches, two corners and a door takes 26 studs and 8 plates of 8 ft. Drywall on both sides is 11 sheets, with 352 screws, 1 roll of tape and 1 box of compound.
Studs and drywall by wall length (8 ft high, 16 in spacing, 2 corners, 1 door, drywall both sides)
Studs include corners, the door and 5% spare.
| Wall length | Studs | Plates (8 ft) | Drywall sheets | Screws |
|---|---|---|---|---|
| 8 ft | 16 | 3 | 5 | 160 |
| 12 ft | 19 | 5 | 7 | 224 |
| 16 ft | 23 | 6 | 9 | 288 |
| 20 ft | 26 | 8 | 11 | 352 |
| 30 ft | 34 | 12 | 17 | 544 |
Tips before you buy
- Studs are usually 16 inches on center, with 24 inches allowed in some non-bearing walls. Drywall edges should land on a stud.
- Use pressure-treated lumber for any plate that sits on concrete, and fasten it with anchors.
- Plan the electrical and plumbing before you close the wall, and ask for an inspection where the code requires it.
- Buy straight studs. Sight down each board, and keep the crowned edge up.
- Frame a bit tall and cut to fit, since ceilings and floors are never perfectly level.
Tools & materials for this project
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Frequently asked questions
How many studs do I need for a 20 foot wall?
26 studs for a 20 ft wall at 16 inch spacing with two corners and a door, including a few spares. The plain spacing alone is 16; corners and openings add the rest.
How much drywall for a 20x8 wall?
11 sheets of 4 × 8 ft for both sides with 10% waste, or 6 for one side.
How many plates do I need?
8 pieces of 8 ft, for one bottom plate and two top plates along 20 ft.
What spacing should studs be?
16 inches on center is standard. 24 inches is allowed for some non-bearing walls and some framing, and 12 inches for walls that carry heavy loads or tile.
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Related calculators & guides
Estimates only. Results assume standard materials and simple shapes. Supplier products vary, and the final call on quantity, structure and safety is yours. Check your local code and your supplier's guidance before ordering.