Wall Stud Calculator
Count the studs and plate boards for a straight framed wall.
Calculator
| Linear feet of plates (1 bottom + 2 top) | 36 ft |
|---|---|
| 8 ft plate boards | 5 boards |
How it is calculated
12 ft × 12 ÷ 16 in = 9.0, rounded up, plus 1 end stud = 10 studs. Plates: 3 × 12 ft = 36 ft.
About this calculator
The number of studs in a straight wall is the length in inches divided by the spacing, rounded up, plus one for the end. At 16 inches on center, a 12-foot wall needs 10 studs for the wall field.
That count is only the field. Corners, intersecting walls, door and window openings, headers and blocking all add studs, so real framing uses more than this calculator shows. Plates are three times the wall length: one bottom plate and a doubled top plate.
Worked examples
| Project | Studs for the wall field | Rough cost |
|---|---|---|
| a 12 ft wall with studs 16 in on center | 10 studs | $30.00 – $90.00 |
| a 20 ft wall with studs 16 in on center | 16 studs | $48.00 – $144 |
| a 30 ft wall with studs 24 in on center | 16 studs | $48.00 – $144 |
| a 50 ft wall with studs 16 in on center | 39 studs | $117 – $351 |
Buying notes
- Add studs for corners and openings before you buy.
- Pick through the stack: crooked studs are best used for blocking.
- Ceiling height changes the stud length; precut studs suit 8-foot ceilings.
Quick answers by size
Click a size for the exact quantity and cost.
How to measure and use this calculator
- Measure the wall length.
- Choose the stud spacing, 16 inches on center being common.
- Read the stud count and plate boards.
- Add extras for corners, doors, windows and headers.
Common mistakes
- Forgetting extra studs at corners and openings.
- Using too-tall precut studs for the ceiling height.
- Not leaving crooked studs for blocking instead of wall field.
Tips
- Add extra studs for corners, intersecting walls, doors, windows and headers.
- 16 in on center is common for load-bearing walls; 24 in suits some non-bearing framing.
- Buy a few extra studs because some will be bowed or twisted.
Frequently asked questions
How many studs for a 10 foot wall?
At 16 in on center, 9 studs, plus extras for corners and openings.
How many studs do I need for a 12 foot wall at 16 inches?
Ten studs for the wall field: 144 ÷ 16 = 9, plus one. Corners and openings need more.
What is on-center spacing?
It is the distance from the center of one stud to the center of the next. 16 inches is the most common spacing.