Stud Calculator
Calculate how many wall studs and plates you need for a wall.
Enter your values to see the result.
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Read the privacy policyHow this calculation works
Understand the method, inputs and limits behind your result.
- Formula
- Base studs = ceil(wall length(in)/spacing(in)) + 1 + 2 × corners + 2 × openings. Required studs round up base × (1 + waste/100). Plate length = wall length × 3.
- Variables
- Units: Feet & inches, Meters & cm
- Wall length (ft / m)
- Stud spacing: 12 in, 16 in, 24 in
- Corners
- Doors & windows
- Extra for waste
- Price per stud (optional)
- Units
- Extra for waste: %
- Use the same selected currency for all monetary inputs. Changing the symbol does not convert exchange rates.
- Example
- A 20 ft wall at 16 in on center needs 16 studs, plus extras for two corners and one door, about 24 with waste.
- Assumptions
- The result follows the selected options and supplied inputs. Displayed values may be rounded; check input precision before using the result.
- Source
- ToolzHive calculation guide and calculator implementation. External reference verification is pending.
- Last reviewed
- Review date not yet recorded.
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Clear instructions
Find steps, examples and limitations below.
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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.
Practical guides
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How to Use Stud Calculator
Calculate how many wall studs and plates you need for a wall from its length and stud spacing, with extra studs for corners and openings.
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