Stud Wall Framing Calculator
Estimate wall studs, opening extras, top and bottom plates, sheathing sheets and framing-lumber cost for a straight wall.
Default project preview
25 studs
Plate boards
8
Sheathing sheets
5
Net wall area
118 ft²
Regular stud positions
16
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Wall length
Enter this project assumption in ft. The current imperial default is 20 ft.
Wall height
Enter this project assumption in ft. The current imperial default is 8 ft.
Stud spacing
Enter this project assumption in in. The current imperial default is 16 in.
Door and window openings
Enter this project assumption in a unitless value. The current imperial default is 2. Minimum: 0.
Total opening area
Enter this project assumption in ft². The current imperial default is 42 ft². Minimum: 0.
Plate runs
Enter this project assumption in a unitless value. The current imperial default is 3. Minimum: 1.
Waste allowance
Enter this project assumption in %. The current imperial default is 10 %. Minimum: 0. Maximum: 50.
Plate stock length
Enter this project assumption in ft. The current imperial default is 8 ft.
Price per stud
Enter this project assumption in a unitless value. The current imperial default is 4.5. Minimum: 0.
Price per plate board
Enter this project assumption in a unitless value. The current imperial default is 5. Minimum: 0.
How to read the outputs
Plate boards
60 ft total plate length. Default preview: 8.
Sheathing sheets
4 × 8 ft equivalent sheets. Default preview: 5.
Net wall area
after openings. Default preview: 118 ft².
Regular stud positions
16 in centres. Default preview: 16.
Opening extras
two additional studs per opening. Default preview: 4.
Lumber cost
studs and plate boards. Default preview: $152.50.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Regular studs = round up (wall length ÷ spacing) + 1. Opening and end studs are added, then waste is applied. Plate boards = round up (wall length × plate runs ÷ stock length).
Reviewed project guidance
How to use this estimate in a real project
Last reviewed: July 29, 2026
Use this calculator to estimate studs, plates and basic framing lumber from wall length, spacing, corners and openings. It supports takeoff planning but not load-bearing design, header sizing or bracing.
Calculation steps
- 1Divide wall length by stud spacing and include both ends.
- 2Add corner and intersection assemblies.
- 3Add opening-specific king, jack and cripple studs.
- 4Calculate plate layers and round all lumber to stock lengths.
Worked numerical example
A 40 ft wall at 16 in on center needs about 31 layout studs including both ends before adding corner, intersection, king, jack and cripple studs.
Purchasing and rounding
Order whole studs and plate boards by grade, species, treatment and stock length. Allow for defects and layout changes.
Interpret the result
The base on-center count is only the repeating field. Openings and intersections often account for a significant share of total studs.
Page-specific assumptions
- Straight walls.
- Uniform spacing.
- Opening framing details are entered separately.
- Lumber dimensions and grades are already specified.
Common mistakes
- Counting only wall length ÷ spacing.
- Omitting the end stud.
- Ignoring corners and openings.
- Using quantity output to size headers or bracing.
Primary and technical references
BuildMeter provides planning estimates, not engineering, architectural, electrical, mechanical, plumbing, permit or code approval. Review the methodology and verify final decisions with product documentation and qualified professionals.
BuildMeter Guides
Understand the measurements and assumptions
Use these visible reference guides before changing project inputs or planning allowances.
FAQ
Stud Wall Framing Calculator questions
Why are extra studs added at openings?+
Doors and windows commonly need king and jack framing, although exact assemblies vary.
Does this calculate headers?+
No. Header size and supports depend on opening width, loads and code.
Can metric framing spacing be used?+
Yes. Enter the intended centre spacing and stock dimensions for the system being used.