Stud Calculator
Calculate how many wall studs and plates you need for a wall.
Enter your values to see the result.
Continue your work
- Drywall Calculator — Cover the framed wall.
- Board Foot Calculator — Price the lumber.
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Clear instructions
Find steps, examples and limitations below.
Use online
Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the Stud Calculator
Calculate how many wall studs and plates you need for a wall.
- 1 Enter the wall length.
- 2 Choose the stud spacing and count corners and openings.
- 3 Read the studs and plate lumber needed.
Example and practical tips
A 20 ft wall at 16 in on center needs 16 studs, plus extras for two corners and one door, about 24 with waste.
Frequently asked questions
16 or 24 inch spacing?
16 in is standard for most walls; 24 in suits non-load-bearing walls and advanced framing.
Why double top plates?
They tie walls together and spread loads from above.
Report an issue
Something broken or not quite right? Tell us and we will look into it.